{"id":12406,"date":"2013-08-24T03:36:00","date_gmt":"2013-08-24T03:36:00","guid":{"rendered":"https:\/\/kiencang.net\/2013\/08\/24\/thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php\/"},"modified":"2013-08-24T03:36:00","modified_gmt":"2013-08-24T03:36:00","slug":"thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php","status":"publish","type":"post","link":"https:\/\/kiencang.net\/thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php\/","title":{"rendered":"Th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP"},"content":{"rendered":"\n
H\u00f4m nay Ki\u1ebfn c\u00e0ng s\u1ebd c\u00f9ng b\u1ea1n th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai v\u1edbi c\u00e1c ph\u00e9p t\u00ednh c\u1ed9ng tr\u1eeb nh\u00e2n chia \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP.<\/p>\n\n\n\n
\u00dd t\u01b0\u1edfng l\u00e0 t\u00f4i s\u1ebd t\u1ea1o 3 \u00f4 input nh\u1eadp d\u1eef li\u1ec7u:<\/p>\n\n\n\n
C\u00f3 m\u1ed9t n\u00fat b\u1ea5m \u0111\u1ec3 sau khi ng\u01b0\u1eddi d\u00f9ng nh\u1eadp \u0111\u1ea7y \u0111\u1ee7 d\u1eef li\u1ec7u h\u1ecd s\u1ebd nh\u1ea5n \u0111\u1ec3 xem k\u1ebft qu\u1ea3 \u2013 ngo\u00e0i ra vi\u1ec7c \u1ea5n ph\u00edm Enter tr\u00ean b\u00e0n ph\u00edm c\u0169ng cho k\u1ebft qu\u1ea3 t\u01b0\u01a1ng t\u1ef1.3 \u00f4 input n\u00e0y s\u1ebd n\u1eb1m trong form, sau khi nh\u1ea5n submit, d\u1eef li\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1ea9y sang trang action.php \u0111\u1ec3 t\u00ednh to\u00e1n, k\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p t\u00ednh sau \u0111\u00f3 \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb cho ng\u01b0\u1eddi d\u00f9ng. <\/p>\n\n\n\n
V\u1edbi y\u00eau c\u1ea7u c\u1ee7a b\u00e0i n\u00e0y, ch\u00fang ta kh\u00f4ng c\u1ea7n C\u01a1 S\u1edf D\u1eef Li\u1ec7u, ch\u1ec9 t\u00ednh to\u00e1n v\u00e0 tr\u1ea3 v\u1ec1 th\u00f4i l\u00e0 \u0111\u1ee7.<\/p>\n\n\n\n
\u0110\u00e2y l\u00e0 m\u1eabu code c\u1ee7a form \u1edf trang index.php:<\/p>\n\n\n\n
<form action=\"action.php\" method=\"get\">\n <input type=\"text\" name=\"so_thu_nhat\" size=\"10\">\n <input type=\"text\" name=\"toan_tu\" size=\"5\">\n <input type=\"text\" name=\"so_thu_hai\u201d size=\"10\">\n =\n <input type=\"text\" name=\"ketqua\" size=\"10\">\n <input type=\"submit\" value=\"T\u00ednh\">\n<\/form><\/code><\/pre>\n\n\n\nTheo \u0111\u00f3, d\u1eef li\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c \u0111\u01b0a sang trang action.php b\u1eb1ng\u00a0ph\u01b0\u01a1ng th\u1ee9c get<\/strong>. Ngo\u00e0i 3 input \u0111\u1ec3 nh\u1eadp li\u1ec7u, ta c\u1ea7n th\u00eam 2 input n\u1eefa, m\u1ed9t c\u00e1i \u0111\u1ec3 hi\u1ec3n th\u1ecb k\u1ebft qu\u1ea3, c\u00f2n m\u1ed9t c\u00e1i l\u00e0m n\u00fat nh\u1ea5n.<\/p>\n\n\n\n\u1ede trang action.php, ch\u00fang ta c\u00f3 kh\u00e1 nhi\u1ec1u vi\u1ec7c ph\u1ea3i l\u00e0m. Tr\u01b0\u1edbc h\u1ebft l\u00e0 l\u1ea5y d\u1eef li\u1ec7u t\u1eeb trang index.php truy\u1ec1n sang b\u1eb1ng bi\u1ebfn si\u00eau to\u00e0n c\u1ee5c $_GET:<\/p>\n\n\n\n$so_thu_nhat=$_GET['so_thu_nhat'];\n$so_thu_hai=$_GET['so_thu_hai'];\n$toan_tu=$_GET['toan_tu'];<\/code><\/pre>\n\n\n\nso_thu_nhat, so_thu_hai, so_thu_ba ch\u00ednh l\u00e0 t\u00ean (thu\u1ed9c t\u00ednh name) c\u1ee7a c\u00e1c input. C\u00e1c bi\u1ebfn s\u1ebd \u0111\u01b0\u1ee3c g\u00e1n v\u00e0o gi\u00e1 tr\u1ecb l\u1ea5y \u0111\u01b0\u1ee3c t\u1eeb c\u00e1c input n\u00e0y.<\/p>\n\n\n\nTi\u1ebfp theo l\u00e0 kh\u00e2u x\u00e1c th\u1ef1c d\u1eef li\u1ec7u, b\u1ea1n ph\u1ea3i x\u00e1c \u0111\u1ecbnh nh\u1eefng \u0111i\u1ec1u kh\u00f4ng mong mu\u1ed1n m\u00e0 c\u00f3 th\u1ec3 ng\u01b0\u1eddi d\u00f9ng s\u1ebd t\u1ea1o ra. C\u1ee5 th\u1ec3:<\/p>\n\n\n\nNg\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 b\u1ecf s\u00f3t kh\u00f4ng nh\u1eadp d\u1eef li\u1ec7u \u1edf tr\u01b0\u1eddng n\u00e0o \u0111\u00f3.<\/li>Ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 nh\u1eadp sai ki\u1ec3u d\u1eef li\u1ec7u, \u0111\u00e1ng nh\u1eadp s\u1ed1 h\u1ecd l\u1ea1i nh\u1eadp ch\u1eef, hay h\u1ecd nh\u1eadp sai to\u00e1n t\u1eed \u2013 trong b\u00e0i n\u00e0y ch\u00fang ta ch\u1ec9 cho ph\u00e9p nh\u1eadp 4 ki\u1ec3u c\u01a1 b\u1ea3n l\u00e0 c\u1ed9ng, tr\u1eeb, nh\u00e2n v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 chia.<\/li><\/ul>\n\n\n\n\/\/ Code c\u1ea3nh b\u00e1o nh\u1eadp thi\u1ebfu d\u1eef li\u1ec7u\nif (empty($so_thu_nhat) || empty($toan_tu) || empty($so_thu_hai)) {\n echo 'Canh bao: Ban nhap thieu du lieu !!!';\n exit();\n}\n\/\/Code c\u1ea3nh b\u00e1o ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i nh\u1eadp s\u1ed1\nif (!is_numeric($so_thu_nhat) || !is_numeric($so_thu_hai )) {\n echo 'Canh bao: Ban phai nhap so !!!';\n exit();\n}<\/code><\/pre>\n\n\n\nCu\u1ed1i c\u00f9ng, t\u00f9y v\u00e0o vi\u1ec7c ng\u01b0\u1eddi d\u00f9ng nh\u1eadp ph\u00e9p t\u00ednh n\u00e0o (to\u00e1n t\u1eed) m\u00e0 ta ti\u1ebfn h\u00e0nh t\u00ednh to\u00e1n:<\/p>\n\n\n\nif ($toan_tu == '+') {\n $ketqua=$so_thu_nhat + $so_thu_hai;\n}\nelse if ($toan_tu == '-') {\n $ketqua=$so_thu_nhat \u2013 $so_thu_hai;\n}\nelse if ($toan_tu == '\/') {\n $ketqua=$so_thu_nhat \/ $so_thu_hai;\n}\nelse if ($toan_tu == '*') {\n $ketqua=$so_thu_nhat * $so_thu_hai;\n}\nelse {\n echo 'Canh bao: Toan tu ban nhap vao khong chinh xac !!!';\n exit();\n}<\/code><\/pre>\n\n\n\n\u0110o\u1ea1n else d\u01b0\u1edbi c\u00f9ng c\u1ea3nh b\u00e1o ng\u01b0\u1eddi d\u00f9ng l\u00e0 h\u1ecd ph\u1ea3i nh\u1eadp \u0111\u00fang to\u00e1n t\u1eed.<\/p>\n\n\n\nNh\u01b0 v\u1eady l\u00e0 ch\u00fang ta \u0111\u00e3 c\u00f3 \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p to\u00e1n, \u0111\u1ec3 hi\u1ec3n th\u1ecb k\u1ebft qu\u1ea3, ch\u00fang l\u00e0 l\u00e0m g\u1ea7n gi\u1ed1ng c\u00e1i form \u1edf trang index.php (*)\u00a0 \u00a0 <\/p>\n\n\n\n <input type=\"text\" value=\"<?php echo $so_thu_nhat ?>\" name=\"so_thu_nhat\" size=\"10\">\n <input type=\"text\" value=\"<?php echo $toan_tu ?>\" name=\"toan_tu\" size=\"5\">\n <input type=\"text\" value=\"<?php echo $so_thu_hai ?>\" name=\"so_thu_hai\" size=\"10\">\n =\n <input type=\"text\" value=\"<?php echo $ketqua ?>\" name=\"ketqua\" size=\"10\"><br\/><br\/>\n <a href=\"index.php\">L\u00e0m ph\u00e9p t\u00ednh kh\u00e1c<\/a><\/code><\/pre>\n\n\n\nNh\u01b0 v\u1eady l\u00e0 xong, b\u1ea1n \u0111\u00e3 th\u1ef1c hi\u1ec7n th\u00e0nh c\u00f4ng l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP.<\/p>\n\n\n\n(*) C\u00f3 m\u1ed9t c\u00e1ch kh\u00e1c l\u00e0 \u1edf trang action.php b\u1ea1n th\u1ef1c hi\u1ec7n chuy\u1ec3n h\u01b0\u1edbng v\u1ec1 trang index.php nh\u01b0 v\u1eady \u0111\u1ee1 m\u1ea5t c\u00f4ng t\u1ea1o l\u1ea1i giao di\u1ec7n \u1edf trang action.php, nh\u01b0ng n\u1ebfu th\u1ebf ch\u00fang ta c\u1ea7n t\u1ea1o SESSION \u0111\u1ec3 khi chuy\u1ec3n t\u1eeb trang n\u00e0y sang trang kh\u00e1c c\u00e1c bi\u1ebfn kh\u00f4ng b\u1ecb m\u1ea5t gi\u00e1 tr\u1ecb.<\/p>\n","protected":false},"excerpt":{"rendered":"H\u00f4m nay Ki\u1ebfn c\u00e0ng s\u1ebd c\u00f9ng b\u1ea1n th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai v\u1edbi c\u00e1c ph\u00e9p t\u00ednh c\u1ed9ng tr\u1eeb nh\u00e2n chia \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP. \u00dd t\u01b0\u1edfng l\u00e0 t\u00f4i s\u1ebd t\u1ea1o 3 \u00f4 input nh\u1eadp d\u1eef li\u1ec7u: \u00d4 \u0111\u1ea7u ti\u00ean l\u00e0 bi\u1ebfn s\u1ed1 th\u1ee9 nh\u1ea5t. \u00d4 ti\u1ebfp theo l\u00e0 to\u00e1n t\u1eed: l\u00e0 m\u1ed9t trong …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[238],"tags":[],"yoast_head":"\nTh\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn c\u00e0ng<\/title>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\t\n\t\n\t\n","yoast_head_json":{"title":"Th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn c\u00e0ng","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/kiencang.net\/thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php\/","og_locale":"vi_VN","og_type":"article","og_title":"Th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn c\u00e0ng","og_description":"H\u00f4m nay Ki\u1ebfn c\u00e0ng s\u1ebd c\u00f9ng b\u1ea1n th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai v\u1edbi c\u00e1c ph\u00e9p t\u00ednh c\u1ed9ng tr\u1eeb nh\u00e2n chia \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP. \u00dd t\u01b0\u1edfng l\u00e0 t\u00f4i s\u1ebd t\u1ea1o 3 \u00f4 input nh\u1eadp d\u1eef li\u1ec7u: \u00d4 \u0111\u1ea7u ti\u00ean l\u00e0 bi\u1ebfn s\u1ed1 th\u1ee9 nh\u1ea5t. \u00d4 ti\u1ebfp theo l\u00e0 to\u00e1n t\u1eed: l\u00e0 m\u1ed9t trong …","og_url":"https:\/\/kiencang.net\/thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php\/","og_site_name":"Ki\u1ebfn c\u00e0ng","article_author":"https:\/\/www.facebook.com\/anhducnguyen87\/","article_published_time":"2013-08-24T03:36:00+00:00","og_image":[{"url":"https:\/\/i2.wp.com\/freehost.page\/wp-content\/uploads\/2021\/02\/cong-tru-nhan-chia.png?resize=530%2C111&ssl=1"}],"author":"Nguy\u1ec5n \u0110\u1ee9c Anh","twitter_card":"summary_large_image","twitter_misc":{"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi":"Nguy\u1ec5n \u0110\u1ee9c Anh","\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc":"4 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T\u00f4i th\u00edch Content, SEO, Ads, T\u0103ng t\u1ed1c website v\u00e0 Th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed. B\u00ean c\u1ea1nh b\u00e0i t\u1ef1 vi\u1ebft, t\u00f4i c\u0169ng d\u1ecbch nhi\u1ec1u n\u1ed9i dung th\u00fa v\u1ecb c\u1ee7a c\u00e1c t\u00e1c gi\u1ea3 kh\u00e1c nhau. FB c\u00e1 nh\u00e2n: facebook.com\/anhducnguyen87. 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Theo \u0111\u00f3, d\u1eef li\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c \u0111\u01b0a sang trang action.php b\u1eb1ng\u00a0ph\u01b0\u01a1ng th\u1ee9c get<\/strong>. Ngo\u00e0i 3 input \u0111\u1ec3 nh\u1eadp li\u1ec7u, ta c\u1ea7n th\u00eam 2 input n\u1eefa, m\u1ed9t c\u00e1i \u0111\u1ec3 hi\u1ec3n th\u1ecb k\u1ebft qu\u1ea3, c\u00f2n m\u1ed9t c\u00e1i l\u00e0m n\u00fat nh\u1ea5n.<\/p>\n\n\n\n\u1ede trang action.php, ch\u00fang ta c\u00f3 kh\u00e1 nhi\u1ec1u vi\u1ec7c ph\u1ea3i l\u00e0m. Tr\u01b0\u1edbc h\u1ebft l\u00e0 l\u1ea5y d\u1eef li\u1ec7u t\u1eeb trang index.php truy\u1ec1n sang b\u1eb1ng bi\u1ebfn si\u00eau to\u00e0n c\u1ee5c $_GET:<\/p>\n\n\n\n$so_thu_nhat=$_GET['so_thu_nhat'];\n$so_thu_hai=$_GET['so_thu_hai'];\n$toan_tu=$_GET['toan_tu'];<\/code><\/pre>\n\n\n\nso_thu_nhat, so_thu_hai, so_thu_ba ch\u00ednh l\u00e0 t\u00ean (thu\u1ed9c t\u00ednh name) c\u1ee7a c\u00e1c input. C\u00e1c bi\u1ebfn s\u1ebd \u0111\u01b0\u1ee3c g\u00e1n v\u00e0o gi\u00e1 tr\u1ecb l\u1ea5y \u0111\u01b0\u1ee3c t\u1eeb c\u00e1c input n\u00e0y.<\/p>\n\n\n\nTi\u1ebfp theo l\u00e0 kh\u00e2u x\u00e1c th\u1ef1c d\u1eef li\u1ec7u, b\u1ea1n ph\u1ea3i x\u00e1c \u0111\u1ecbnh nh\u1eefng \u0111i\u1ec1u kh\u00f4ng mong mu\u1ed1n m\u00e0 c\u00f3 th\u1ec3 ng\u01b0\u1eddi d\u00f9ng s\u1ebd t\u1ea1o ra. C\u1ee5 th\u1ec3:<\/p>\n\n\n\nNg\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 b\u1ecf s\u00f3t kh\u00f4ng nh\u1eadp d\u1eef li\u1ec7u \u1edf tr\u01b0\u1eddng n\u00e0o \u0111\u00f3.<\/li>Ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 nh\u1eadp sai ki\u1ec3u d\u1eef li\u1ec7u, \u0111\u00e1ng nh\u1eadp s\u1ed1 h\u1ecd l\u1ea1i nh\u1eadp ch\u1eef, hay h\u1ecd nh\u1eadp sai to\u00e1n t\u1eed \u2013 trong b\u00e0i n\u00e0y ch\u00fang ta ch\u1ec9 cho ph\u00e9p nh\u1eadp 4 ki\u1ec3u c\u01a1 b\u1ea3n l\u00e0 c\u1ed9ng, tr\u1eeb, nh\u00e2n v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 chia.<\/li><\/ul>\n\n\n\n\/\/ Code c\u1ea3nh b\u00e1o nh\u1eadp thi\u1ebfu d\u1eef li\u1ec7u\nif (empty($so_thu_nhat) || empty($toan_tu) || empty($so_thu_hai)) {\n echo 'Canh bao: Ban nhap thieu du lieu !!!';\n exit();\n}\n\/\/Code c\u1ea3nh b\u00e1o ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i nh\u1eadp s\u1ed1\nif (!is_numeric($so_thu_nhat) || !is_numeric($so_thu_hai )) {\n echo 'Canh bao: Ban phai nhap so !!!';\n exit();\n}<\/code><\/pre>\n\n\n\nCu\u1ed1i c\u00f9ng, t\u00f9y v\u00e0o vi\u1ec7c ng\u01b0\u1eddi d\u00f9ng nh\u1eadp ph\u00e9p t\u00ednh n\u00e0o (to\u00e1n t\u1eed) m\u00e0 ta ti\u1ebfn h\u00e0nh t\u00ednh to\u00e1n:<\/p>\n\n\n\nif ($toan_tu == '+') {\n $ketqua=$so_thu_nhat + $so_thu_hai;\n}\nelse if ($toan_tu == '-') {\n $ketqua=$so_thu_nhat \u2013 $so_thu_hai;\n}\nelse if ($toan_tu == '\/') {\n $ketqua=$so_thu_nhat \/ $so_thu_hai;\n}\nelse if ($toan_tu == '*') {\n $ketqua=$so_thu_nhat * $so_thu_hai;\n}\nelse {\n echo 'Canh bao: Toan tu ban nhap vao khong chinh xac !!!';\n exit();\n}<\/code><\/pre>\n\n\n\n\u0110o\u1ea1n else d\u01b0\u1edbi c\u00f9ng c\u1ea3nh b\u00e1o ng\u01b0\u1eddi d\u00f9ng l\u00e0 h\u1ecd ph\u1ea3i nh\u1eadp \u0111\u00fang to\u00e1n t\u1eed.<\/p>\n\n\n\nNh\u01b0 v\u1eady l\u00e0 ch\u00fang ta \u0111\u00e3 c\u00f3 \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p to\u00e1n, \u0111\u1ec3 hi\u1ec3n th\u1ecb k\u1ebft qu\u1ea3, ch\u00fang l\u00e0 l\u00e0m g\u1ea7n gi\u1ed1ng c\u00e1i form \u1edf trang index.php (*)\u00a0 \u00a0 <\/p>\n\n\n\n <input type=\"text\" value=\"<?php echo $so_thu_nhat ?>\" name=\"so_thu_nhat\" size=\"10\">\n <input type=\"text\" value=\"<?php echo $toan_tu ?>\" name=\"toan_tu\" size=\"5\">\n <input type=\"text\" value=\"<?php echo $so_thu_hai ?>\" name=\"so_thu_hai\" size=\"10\">\n =\n <input type=\"text\" value=\"<?php echo $ketqua ?>\" name=\"ketqua\" size=\"10\"><br\/><br\/>\n <a href=\"index.php\">L\u00e0m ph\u00e9p t\u00ednh kh\u00e1c<\/a><\/code><\/pre>\n\n\n\nNh\u01b0 v\u1eady l\u00e0 xong, b\u1ea1n \u0111\u00e3 th\u1ef1c hi\u1ec7n th\u00e0nh c\u00f4ng l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP.<\/p>\n\n\n\n(*) C\u00f3 m\u1ed9t c\u00e1ch kh\u00e1c l\u00e0 \u1edf trang action.php b\u1ea1n th\u1ef1c hi\u1ec7n chuy\u1ec3n h\u01b0\u1edbng v\u1ec1 trang index.php nh\u01b0 v\u1eady \u0111\u1ee1 m\u1ea5t c\u00f4ng t\u1ea1o l\u1ea1i giao di\u1ec7n \u1edf trang action.php, nh\u01b0ng n\u1ebfu th\u1ebf ch\u00fang ta c\u1ea7n t\u1ea1o SESSION \u0111\u1ec3 khi chuy\u1ec3n t\u1eeb trang n\u00e0y sang trang kh\u00e1c c\u00e1c bi\u1ebfn kh\u00f4ng b\u1ecb m\u1ea5t gi\u00e1 tr\u1ecb.<\/p>\n","protected":false},"excerpt":{"rendered":"H\u00f4m nay Ki\u1ebfn c\u00e0ng s\u1ebd c\u00f9ng b\u1ea1n th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai v\u1edbi c\u00e1c ph\u00e9p t\u00ednh c\u1ed9ng tr\u1eeb nh\u00e2n chia \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP. \u00dd t\u01b0\u1edfng l\u00e0 t\u00f4i s\u1ebd t\u1ea1o 3 \u00f4 input nh\u1eadp d\u1eef li\u1ec7u: \u00d4 \u0111\u1ea7u ti\u00ean l\u00e0 bi\u1ebfn s\u1ed1 th\u1ee9 nh\u1ea5t. \u00d4 ti\u1ebfp theo l\u00e0 to\u00e1n t\u1eed: l\u00e0 m\u1ed9t trong …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[238],"tags":[],"yoast_head":"\nTh\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn c\u00e0ng<\/title>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\t\n\t\n\t\n","yoast_head_json":{"title":"Th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn c\u00e0ng","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/kiencang.net\/thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php\/","og_locale":"vi_VN","og_type":"article","og_title":"Th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn c\u00e0ng","og_description":"H\u00f4m nay Ki\u1ebfn c\u00e0ng s\u1ebd c\u00f9ng b\u1ea1n th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai v\u1edbi c\u00e1c ph\u00e9p t\u00ednh c\u1ed9ng tr\u1eeb nh\u00e2n chia \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP. \u00dd t\u01b0\u1edfng l\u00e0 t\u00f4i s\u1ebd t\u1ea1o 3 \u00f4 input nh\u1eadp d\u1eef li\u1ec7u: \u00d4 \u0111\u1ea7u ti\u00ean l\u00e0 bi\u1ebfn s\u1ed1 th\u1ee9 nh\u1ea5t. \u00d4 ti\u1ebfp theo l\u00e0 to\u00e1n t\u1eed: l\u00e0 m\u1ed9t trong …","og_url":"https:\/\/kiencang.net\/thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php\/","og_site_name":"Ki\u1ebfn c\u00e0ng","article_author":"https:\/\/www.facebook.com\/anhducnguyen87\/","article_published_time":"2013-08-24T03:36:00+00:00","og_image":[{"url":"https:\/\/i2.wp.com\/freehost.page\/wp-content\/uploads\/2021\/02\/cong-tru-nhan-chia.png?resize=530%2C111&ssl=1"}],"author":"Nguy\u1ec5n \u0110\u1ee9c Anh","twitter_card":"summary_large_image","twitter_misc":{"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi":"Nguy\u1ec5n \u0110\u1ee9c Anh","\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc":"4 ph\u00fat"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/kiencang.net\/thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php\/","url":"https:\/\/kiencang.net\/thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php\/","name":"Th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn 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c\u00e0ng","description":"\u00d4m l\u00fd thuy\u1ebft, h\u00f4n th\u1ef1c h\u00e0nh","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/kiencang.net\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"vi"},{"@type":"Person","@id":"https:\/\/kiencang.net\/#\/schema\/person\/5e7e1a04d8d1218ad8c421ba43d25c16","name":"Nguy\u1ec5n \u0110\u1ee9c Anh","image":{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/kiencang.net\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/6d71f9b89393952a8382e30dad26c1ec?s=96&d=monsterid&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/6d71f9b89393952a8382e30dad26c1ec?s=96&d=monsterid&r=g","caption":"Nguy\u1ec5n \u0110\u1ee9c Anh"},"description":"Sinh n\u0103m 1987, t\u1ed1t nghi\u1ec7p Cao \u0111\u1eb3ng th\u1ef1c h\u00e0nh FPT qu\u00e3ng 2014, chuy\u00ean ng\u00e0nh Thi\u1ebft k\u1ebf website. T\u00f4i th\u00edch Content, SEO, Ads, T\u0103ng t\u1ed1c website v\u00e0 Th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed. B\u00ean c\u1ea1nh b\u00e0i t\u1ef1 vi\u1ebft, t\u00f4i c\u0169ng d\u1ecbch nhi\u1ec1u n\u1ed9i dung th\u00fa v\u1ecb c\u1ee7a c\u00e1c t\u00e1c gi\u1ea3 kh\u00e1c nhau. FB c\u00e1 nh\u00e2n: facebook.com\/anhducnguyen87. 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\u1ede trang action.php, ch\u00fang ta c\u00f3 kh\u00e1 nhi\u1ec1u vi\u1ec7c ph\u1ea3i l\u00e0m. Tr\u01b0\u1edbc h\u1ebft l\u00e0 l\u1ea5y d\u1eef li\u1ec7u t\u1eeb trang index.php truy\u1ec1n sang b\u1eb1ng bi\u1ebfn si\u00eau to\u00e0n c\u1ee5c $_GET:<\/p>\n\n\n\n
$so_thu_nhat=$_GET['so_thu_nhat'];\n$so_thu_hai=$_GET['so_thu_hai'];\n$toan_tu=$_GET['toan_tu'];<\/code><\/pre>\n\n\n\nso_thu_nhat, so_thu_hai, so_thu_ba ch\u00ednh l\u00e0 t\u00ean (thu\u1ed9c t\u00ednh name) c\u1ee7a c\u00e1c input. C\u00e1c bi\u1ebfn s\u1ebd \u0111\u01b0\u1ee3c g\u00e1n v\u00e0o gi\u00e1 tr\u1ecb l\u1ea5y \u0111\u01b0\u1ee3c t\u1eeb c\u00e1c input n\u00e0y.<\/p>\n\n\n\nTi\u1ebfp theo l\u00e0 kh\u00e2u x\u00e1c th\u1ef1c d\u1eef li\u1ec7u, b\u1ea1n ph\u1ea3i x\u00e1c \u0111\u1ecbnh nh\u1eefng \u0111i\u1ec1u kh\u00f4ng mong mu\u1ed1n m\u00e0 c\u00f3 th\u1ec3 ng\u01b0\u1eddi d\u00f9ng s\u1ebd t\u1ea1o ra. C\u1ee5 th\u1ec3:<\/p>\n\n\n\nNg\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 b\u1ecf s\u00f3t kh\u00f4ng nh\u1eadp d\u1eef li\u1ec7u \u1edf tr\u01b0\u1eddng n\u00e0o \u0111\u00f3.<\/li>Ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 nh\u1eadp sai ki\u1ec3u d\u1eef li\u1ec7u, \u0111\u00e1ng nh\u1eadp s\u1ed1 h\u1ecd l\u1ea1i nh\u1eadp ch\u1eef, hay h\u1ecd nh\u1eadp sai to\u00e1n t\u1eed \u2013 trong b\u00e0i n\u00e0y ch\u00fang ta ch\u1ec9 cho ph\u00e9p nh\u1eadp 4 ki\u1ec3u c\u01a1 b\u1ea3n l\u00e0 c\u1ed9ng, tr\u1eeb, nh\u00e2n v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 chia.<\/li><\/ul>\n\n\n\n\/\/ Code c\u1ea3nh b\u00e1o nh\u1eadp thi\u1ebfu d\u1eef li\u1ec7u\nif (empty($so_thu_nhat) || empty($toan_tu) || empty($so_thu_hai)) {\n echo 'Canh bao: Ban nhap thieu du lieu !!!';\n exit();\n}\n\/\/Code c\u1ea3nh b\u00e1o ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i nh\u1eadp s\u1ed1\nif (!is_numeric($so_thu_nhat) || !is_numeric($so_thu_hai )) {\n echo 'Canh bao: Ban phai nhap so !!!';\n exit();\n}<\/code><\/pre>\n\n\n\nCu\u1ed1i c\u00f9ng, t\u00f9y v\u00e0o vi\u1ec7c ng\u01b0\u1eddi d\u00f9ng nh\u1eadp ph\u00e9p t\u00ednh n\u00e0o (to\u00e1n t\u1eed) m\u00e0 ta ti\u1ebfn h\u00e0nh t\u00ednh to\u00e1n:<\/p>\n\n\n\nif ($toan_tu == '+') {\n $ketqua=$so_thu_nhat + $so_thu_hai;\n}\nelse if ($toan_tu == '-') {\n $ketqua=$so_thu_nhat \u2013 $so_thu_hai;\n}\nelse if ($toan_tu == '\/') {\n $ketqua=$so_thu_nhat \/ $so_thu_hai;\n}\nelse if ($toan_tu == '*') {\n $ketqua=$so_thu_nhat * $so_thu_hai;\n}\nelse {\n echo 'Canh bao: Toan tu ban nhap vao khong chinh xac !!!';\n exit();\n}<\/code><\/pre>\n\n\n\n\u0110o\u1ea1n else d\u01b0\u1edbi c\u00f9ng c\u1ea3nh b\u00e1o ng\u01b0\u1eddi d\u00f9ng l\u00e0 h\u1ecd ph\u1ea3i nh\u1eadp \u0111\u00fang to\u00e1n t\u1eed.<\/p>\n\n\n\nNh\u01b0 v\u1eady l\u00e0 ch\u00fang ta \u0111\u00e3 c\u00f3 \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p to\u00e1n, \u0111\u1ec3 hi\u1ec3n th\u1ecb k\u1ebft qu\u1ea3, ch\u00fang l\u00e0 l\u00e0m g\u1ea7n gi\u1ed1ng c\u00e1i form \u1edf trang index.php (*)\u00a0 \u00a0 <\/p>\n\n\n\n <input type=\"text\" value=\"<?php echo $so_thu_nhat ?>\" name=\"so_thu_nhat\" size=\"10\">\n <input type=\"text\" value=\"<?php echo $toan_tu ?>\" name=\"toan_tu\" size=\"5\">\n <input type=\"text\" value=\"<?php echo $so_thu_hai ?>\" name=\"so_thu_hai\" size=\"10\">\n =\n <input type=\"text\" value=\"<?php echo $ketqua ?>\" name=\"ketqua\" size=\"10\"><br\/><br\/>\n <a href=\"index.php\">L\u00e0m ph\u00e9p t\u00ednh kh\u00e1c<\/a><\/code><\/pre>\n\n\n\nNh\u01b0 v\u1eady l\u00e0 xong, b\u1ea1n \u0111\u00e3 th\u1ef1c hi\u1ec7n th\u00e0nh c\u00f4ng l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP.<\/p>\n\n\n\n(*) C\u00f3 m\u1ed9t c\u00e1ch kh\u00e1c l\u00e0 \u1edf trang action.php b\u1ea1n th\u1ef1c hi\u1ec7n chuy\u1ec3n h\u01b0\u1edbng v\u1ec1 trang index.php nh\u01b0 v\u1eady \u0111\u1ee1 m\u1ea5t c\u00f4ng t\u1ea1o l\u1ea1i giao di\u1ec7n \u1edf trang action.php, nh\u01b0ng n\u1ebfu th\u1ebf ch\u00fang ta c\u1ea7n t\u1ea1o SESSION \u0111\u1ec3 khi chuy\u1ec3n t\u1eeb trang n\u00e0y sang trang kh\u00e1c c\u00e1c bi\u1ebfn kh\u00f4ng b\u1ecb m\u1ea5t gi\u00e1 tr\u1ecb.<\/p>\n","protected":false},"excerpt":{"rendered":"H\u00f4m nay Ki\u1ebfn c\u00e0ng s\u1ebd c\u00f9ng b\u1ea1n th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai v\u1edbi c\u00e1c ph\u00e9p t\u00ednh c\u1ed9ng tr\u1eeb nh\u00e2n chia \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP. \u00dd t\u01b0\u1edfng l\u00e0 t\u00f4i s\u1ebd t\u1ea1o 3 \u00f4 input nh\u1eadp d\u1eef li\u1ec7u: \u00d4 \u0111\u1ea7u ti\u00ean l\u00e0 bi\u1ebfn s\u1ed1 th\u1ee9 nh\u1ea5t. \u00d4 ti\u1ebfp theo l\u00e0 to\u00e1n t\u1eed: l\u00e0 m\u1ed9t trong …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[238],"tags":[],"yoast_head":"\nTh\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn c\u00e0ng<\/title>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\t\n\t\n\t\n","yoast_head_json":{"title":"Th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn c\u00e0ng","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/kiencang.net\/thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php\/","og_locale":"vi_VN","og_type":"article","og_title":"Th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn c\u00e0ng","og_description":"H\u00f4m nay Ki\u1ebfn c\u00e0ng s\u1ebd c\u00f9ng b\u1ea1n th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai v\u1edbi c\u00e1c ph\u00e9p t\u00ednh c\u1ed9ng tr\u1eeb nh\u00e2n chia \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP. \u00dd t\u01b0\u1edfng l\u00e0 t\u00f4i s\u1ebd t\u1ea1o 3 \u00f4 input nh\u1eadp d\u1eef li\u1ec7u: \u00d4 \u0111\u1ea7u ti\u00ean l\u00e0 bi\u1ebfn s\u1ed1 th\u1ee9 nh\u1ea5t. \u00d4 ti\u1ebfp theo l\u00e0 to\u00e1n t\u1eed: l\u00e0 m\u1ed9t trong …","og_url":"https:\/\/kiencang.net\/thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php\/","og_site_name":"Ki\u1ebfn c\u00e0ng","article_author":"https:\/\/www.facebook.com\/anhducnguyen87\/","article_published_time":"2013-08-24T03:36:00+00:00","og_image":[{"url":"https:\/\/i2.wp.com\/freehost.page\/wp-content\/uploads\/2021\/02\/cong-tru-nhan-chia.png?resize=530%2C111&ssl=1"}],"author":"Nguy\u1ec5n \u0110\u1ee9c Anh","twitter_card":"summary_large_image","twitter_misc":{"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi":"Nguy\u1ec5n \u0110\u1ee9c Anh","\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc":"4 ph\u00fat"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/kiencang.net\/thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php\/","url":"https:\/\/kiencang.net\/thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php\/","name":"Th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn 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T\u00f4i th\u00edch Content, SEO, Ads, T\u0103ng t\u1ed1c website v\u00e0 Th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed. B\u00ean c\u1ea1nh b\u00e0i t\u1ef1 vi\u1ebft, t\u00f4i c\u0169ng d\u1ecbch nhi\u1ec1u n\u1ed9i dung th\u00fa v\u1ecb c\u1ee7a c\u00e1c t\u00e1c gi\u1ea3 kh\u00e1c nhau. FB c\u00e1 nh\u00e2n: facebook.com\/anhducnguyen87. Email li\u00ean h\u1ec7: guiemailchotoi@gmail.com","sameAs":["https:\/\/www.facebook.com\/anhducnguyen87\/"],"url":"https:\/\/kiencang.net\/author\/admin\/"}]}},"_links":{"self":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts\/12406"}],"collection":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/comments?post=12406"}],"version-history":[{"count":0,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts\/12406\/revisions"}],"wp:attachment":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/media?parent=12406"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/categories?post=12406"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/tags?post=12406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
so_thu_nhat, so_thu_hai, so_thu_ba ch\u00ednh l\u00e0 t\u00ean (thu\u1ed9c t\u00ednh name) c\u1ee7a c\u00e1c input. C\u00e1c bi\u1ebfn s\u1ebd \u0111\u01b0\u1ee3c g\u00e1n v\u00e0o gi\u00e1 tr\u1ecb l\u1ea5y \u0111\u01b0\u1ee3c t\u1eeb c\u00e1c input n\u00e0y.<\/p>\n\n\n\n
Ti\u1ebfp theo l\u00e0 kh\u00e2u x\u00e1c th\u1ef1c d\u1eef li\u1ec7u, b\u1ea1n ph\u1ea3i x\u00e1c \u0111\u1ecbnh nh\u1eefng \u0111i\u1ec1u kh\u00f4ng mong mu\u1ed1n m\u00e0 c\u00f3 th\u1ec3 ng\u01b0\u1eddi d\u00f9ng s\u1ebd t\u1ea1o ra. C\u1ee5 th\u1ec3:<\/p>\n\n\n\n
\/\/ Code c\u1ea3nh b\u00e1o nh\u1eadp thi\u1ebfu d\u1eef li\u1ec7u\nif (empty($so_thu_nhat) || empty($toan_tu) || empty($so_thu_hai)) {\n echo 'Canh bao: Ban nhap thieu du lieu !!!';\n exit();\n}\n\/\/Code c\u1ea3nh b\u00e1o ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i nh\u1eadp s\u1ed1\nif (!is_numeric($so_thu_nhat) || !is_numeric($so_thu_hai )) {\n echo 'Canh bao: Ban phai nhap so !!!';\n exit();\n}<\/code><\/pre>\n\n\n\nCu\u1ed1i c\u00f9ng, t\u00f9y v\u00e0o vi\u1ec7c ng\u01b0\u1eddi d\u00f9ng nh\u1eadp ph\u00e9p t\u00ednh n\u00e0o (to\u00e1n t\u1eed) m\u00e0 ta ti\u1ebfn h\u00e0nh t\u00ednh to\u00e1n:<\/p>\n\n\n\nif ($toan_tu == '+') {\n $ketqua=$so_thu_nhat + $so_thu_hai;\n}\nelse if ($toan_tu == '-') {\n $ketqua=$so_thu_nhat \u2013 $so_thu_hai;\n}\nelse if ($toan_tu == '\/') {\n $ketqua=$so_thu_nhat \/ $so_thu_hai;\n}\nelse if ($toan_tu == '*') {\n $ketqua=$so_thu_nhat * $so_thu_hai;\n}\nelse {\n echo 'Canh bao: Toan tu ban nhap vao khong chinh xac !!!';\n exit();\n}<\/code><\/pre>\n\n\n\n\u0110o\u1ea1n else d\u01b0\u1edbi c\u00f9ng c\u1ea3nh b\u00e1o ng\u01b0\u1eddi d\u00f9ng l\u00e0 h\u1ecd ph\u1ea3i nh\u1eadp \u0111\u00fang to\u00e1n t\u1eed.<\/p>\n\n\n\nNh\u01b0 v\u1eady l\u00e0 ch\u00fang ta \u0111\u00e3 c\u00f3 \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p to\u00e1n, \u0111\u1ec3 hi\u1ec3n th\u1ecb k\u1ebft qu\u1ea3, ch\u00fang l\u00e0 l\u00e0m g\u1ea7n gi\u1ed1ng c\u00e1i form \u1edf trang index.php (*)\u00a0 \u00a0 <\/p>\n\n\n\n <input type=\"text\" value=\"<?php echo $so_thu_nhat ?>\" name=\"so_thu_nhat\" size=\"10\">\n <input type=\"text\" value=\"<?php echo $toan_tu ?>\" name=\"toan_tu\" size=\"5\">\n <input type=\"text\" value=\"<?php echo $so_thu_hai ?>\" name=\"so_thu_hai\" size=\"10\">\n =\n <input type=\"text\" value=\"<?php echo $ketqua ?>\" name=\"ketqua\" size=\"10\"><br\/><br\/>\n <a href=\"index.php\">L\u00e0m ph\u00e9p t\u00ednh kh\u00e1c<\/a><\/code><\/pre>\n\n\n\nNh\u01b0 v\u1eady l\u00e0 xong, b\u1ea1n \u0111\u00e3 th\u1ef1c hi\u1ec7n th\u00e0nh c\u00f4ng l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP.<\/p>\n\n\n\n(*) C\u00f3 m\u1ed9t c\u00e1ch kh\u00e1c l\u00e0 \u1edf trang action.php b\u1ea1n th\u1ef1c hi\u1ec7n chuy\u1ec3n h\u01b0\u1edbng v\u1ec1 trang index.php nh\u01b0 v\u1eady \u0111\u1ee1 m\u1ea5t c\u00f4ng t\u1ea1o l\u1ea1i giao di\u1ec7n \u1edf trang action.php, nh\u01b0ng n\u1ebfu th\u1ebf ch\u00fang ta c\u1ea7n t\u1ea1o SESSION \u0111\u1ec3 khi chuy\u1ec3n t\u1eeb trang n\u00e0y sang trang kh\u00e1c c\u00e1c bi\u1ebfn kh\u00f4ng b\u1ecb m\u1ea5t gi\u00e1 tr\u1ecb.<\/p>\n","protected":false},"excerpt":{"rendered":"H\u00f4m nay Ki\u1ebfn c\u00e0ng s\u1ebd c\u00f9ng b\u1ea1n th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai v\u1edbi c\u00e1c ph\u00e9p t\u00ednh c\u1ed9ng tr\u1eeb nh\u00e2n chia \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP. \u00dd t\u01b0\u1edfng l\u00e0 t\u00f4i s\u1ebd t\u1ea1o 3 \u00f4 input nh\u1eadp d\u1eef li\u1ec7u: \u00d4 \u0111\u1ea7u ti\u00ean l\u00e0 bi\u1ebfn s\u1ed1 th\u1ee9 nh\u1ea5t. \u00d4 ti\u1ebfp theo l\u00e0 to\u00e1n t\u1eed: l\u00e0 m\u1ed9t trong …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[238],"tags":[],"yoast_head":"\nTh\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn c\u00e0ng<\/title>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\t\n\t\n\t\n","yoast_head_json":{"title":"Th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn 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Cu\u1ed1i c\u00f9ng, t\u00f9y v\u00e0o vi\u1ec7c ng\u01b0\u1eddi d\u00f9ng nh\u1eadp ph\u00e9p t\u00ednh n\u00e0o (to\u00e1n t\u1eed) m\u00e0 ta ti\u1ebfn h\u00e0nh t\u00ednh to\u00e1n:<\/p>\n\n\n\n
if ($toan_tu == '+') {\n $ketqua=$so_thu_nhat + $so_thu_hai;\n}\nelse if ($toan_tu == '-') {\n $ketqua=$so_thu_nhat \u2013 $so_thu_hai;\n}\nelse if ($toan_tu == '\/') {\n $ketqua=$so_thu_nhat \/ $so_thu_hai;\n}\nelse if ($toan_tu == '*') {\n $ketqua=$so_thu_nhat * $so_thu_hai;\n}\nelse {\n echo 'Canh bao: Toan tu ban nhap vao khong chinh xac !!!';\n exit();\n}<\/code><\/pre>\n\n\n\n\u0110o\u1ea1n else d\u01b0\u1edbi c\u00f9ng c\u1ea3nh b\u00e1o ng\u01b0\u1eddi d\u00f9ng l\u00e0 h\u1ecd ph\u1ea3i nh\u1eadp \u0111\u00fang to\u00e1n t\u1eed.<\/p>\n\n\n\nNh\u01b0 v\u1eady l\u00e0 ch\u00fang ta \u0111\u00e3 c\u00f3 \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p to\u00e1n, \u0111\u1ec3 hi\u1ec3n th\u1ecb k\u1ebft qu\u1ea3, ch\u00fang l\u00e0 l\u00e0m g\u1ea7n gi\u1ed1ng c\u00e1i form \u1edf trang index.php (*)\u00a0 \u00a0 <\/p>\n\n\n\n <input type=\"text\" value=\"<?php echo $so_thu_nhat ?>\" name=\"so_thu_nhat\" size=\"10\">\n <input type=\"text\" value=\"<?php echo $toan_tu ?>\" name=\"toan_tu\" size=\"5\">\n <input type=\"text\" value=\"<?php echo $so_thu_hai ?>\" name=\"so_thu_hai\" size=\"10\">\n =\n <input type=\"text\" value=\"<?php echo $ketqua ?>\" name=\"ketqua\" size=\"10\"><br\/><br\/>\n <a href=\"index.php\">L\u00e0m ph\u00e9p t\u00ednh kh\u00e1c<\/a><\/code><\/pre>\n\n\n\nNh\u01b0 v\u1eady l\u00e0 xong, b\u1ea1n \u0111\u00e3 th\u1ef1c hi\u1ec7n th\u00e0nh c\u00f4ng l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP.<\/p>\n\n\n\n(*) C\u00f3 m\u1ed9t c\u00e1ch kh\u00e1c l\u00e0 \u1edf trang action.php b\u1ea1n th\u1ef1c hi\u1ec7n chuy\u1ec3n h\u01b0\u1edbng v\u1ec1 trang index.php nh\u01b0 v\u1eady \u0111\u1ee1 m\u1ea5t c\u00f4ng t\u1ea1o l\u1ea1i giao di\u1ec7n \u1edf trang action.php, nh\u01b0ng n\u1ebfu th\u1ebf ch\u00fang ta c\u1ea7n t\u1ea1o SESSION \u0111\u1ec3 khi chuy\u1ec3n t\u1eeb trang n\u00e0y sang trang kh\u00e1c c\u00e1c bi\u1ebfn kh\u00f4ng b\u1ecb m\u1ea5t gi\u00e1 tr\u1ecb.<\/p>\n","protected":false},"excerpt":{"rendered":"H\u00f4m nay Ki\u1ebfn c\u00e0ng s\u1ebd c\u00f9ng b\u1ea1n th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai v\u1edbi c\u00e1c ph\u00e9p t\u00ednh c\u1ed9ng tr\u1eeb nh\u00e2n chia \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP. \u00dd t\u01b0\u1edfng l\u00e0 t\u00f4i s\u1ebd t\u1ea1o 3 \u00f4 input nh\u1eadp d\u1eef li\u1ec7u: \u00d4 \u0111\u1ea7u ti\u00ean l\u00e0 bi\u1ebfn s\u1ed1 th\u1ee9 nh\u1ea5t. \u00d4 ti\u1ebfp theo l\u00e0 to\u00e1n t\u1eed: l\u00e0 m\u1ed9t trong …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[238],"tags":[],"yoast_head":"\nTh\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn c\u00e0ng<\/title>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\t\n\t\n\t\n","yoast_head_json":{"title":"Th\u1ef1c h\u00e0nh 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T\u00f4i th\u00edch Content, SEO, Ads, T\u0103ng t\u1ed1c website v\u00e0 Th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed. B\u00ean c\u1ea1nh b\u00e0i t\u1ef1 vi\u1ebft, t\u00f4i c\u0169ng d\u1ecbch nhi\u1ec1u n\u1ed9i dung th\u00fa v\u1ecb c\u1ee7a c\u00e1c t\u00e1c gi\u1ea3 kh\u00e1c nhau. FB c\u00e1 nh\u00e2n: facebook.com\/anhducnguyen87. Email li\u00ean h\u1ec7: guiemailchotoi@gmail.com","sameAs":["https:\/\/www.facebook.com\/anhducnguyen87\/"],"url":"https:\/\/kiencang.net\/author\/admin\/"}]}},"_links":{"self":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts\/12406"}],"collection":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/comments?post=12406"}],"version-history":[{"count":0,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts\/12406\/revisions"}],"wp:attachment":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/media?parent=12406"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/categories?post=12406"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/tags?post=12406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\u0110o\u1ea1n else d\u01b0\u1edbi c\u00f9ng c\u1ea3nh b\u00e1o ng\u01b0\u1eddi d\u00f9ng l\u00e0 h\u1ecd ph\u1ea3i nh\u1eadp \u0111\u00fang to\u00e1n t\u1eed.<\/p>\n\n\n\n
Nh\u01b0 v\u1eady l\u00e0 ch\u00fang ta \u0111\u00e3 c\u00f3 \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p to\u00e1n, \u0111\u1ec3 hi\u1ec3n th\u1ecb k\u1ebft qu\u1ea3, ch\u00fang l\u00e0 l\u00e0m g\u1ea7n gi\u1ed1ng c\u00e1i form \u1edf trang index.php (*)\u00a0 \u00a0 <\/p>\n\n\n\n
<input type=\"text\" value=\"<?php echo $so_thu_nhat ?>\" name=\"so_thu_nhat\" size=\"10\">\n <input type=\"text\" value=\"<?php echo $toan_tu ?>\" name=\"toan_tu\" size=\"5\">\n <input type=\"text\" value=\"<?php echo $so_thu_hai ?>\" name=\"so_thu_hai\" size=\"10\">\n =\n <input type=\"text\" value=\"<?php echo $ketqua ?>\" name=\"ketqua\" size=\"10\"><br\/><br\/>\n <a href=\"index.php\">L\u00e0m ph\u00e9p t\u00ednh kh\u00e1c<\/a><\/code><\/pre>\n\n\n\nNh\u01b0 v\u1eady l\u00e0 xong, b\u1ea1n \u0111\u00e3 th\u1ef1c hi\u1ec7n th\u00e0nh c\u00f4ng l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP.<\/p>\n\n\n\n(*) C\u00f3 m\u1ed9t c\u00e1ch kh\u00e1c l\u00e0 \u1edf trang action.php b\u1ea1n th\u1ef1c hi\u1ec7n chuy\u1ec3n h\u01b0\u1edbng v\u1ec1 trang index.php nh\u01b0 v\u1eady \u0111\u1ee1 m\u1ea5t c\u00f4ng t\u1ea1o l\u1ea1i giao di\u1ec7n \u1edf trang action.php, nh\u01b0ng n\u1ebfu th\u1ebf ch\u00fang ta c\u1ea7n t\u1ea1o SESSION \u0111\u1ec3 khi chuy\u1ec3n t\u1eeb trang n\u00e0y sang trang kh\u00e1c c\u00e1c bi\u1ebfn kh\u00f4ng b\u1ecb m\u1ea5t gi\u00e1 tr\u1ecb.<\/p>\n","protected":false},"excerpt":{"rendered":"H\u00f4m nay Ki\u1ebfn c\u00e0ng s\u1ebd c\u00f9ng b\u1ea1n th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai v\u1edbi c\u00e1c ph\u00e9p t\u00ednh c\u1ed9ng tr\u1eeb nh\u00e2n chia \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP. \u00dd t\u01b0\u1edfng l\u00e0 t\u00f4i s\u1ebd t\u1ea1o 3 \u00f4 input nh\u1eadp d\u1eef li\u1ec7u: \u00d4 \u0111\u1ea7u ti\u00ean l\u00e0 bi\u1ebfn s\u1ed1 th\u1ee9 nh\u1ea5t. \u00d4 ti\u1ebfp theo l\u00e0 to\u00e1n t\u1eed: l\u00e0 m\u1ed9t trong …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[238],"tags":[],"yoast_head":"\nTh\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn c\u00e0ng<\/title>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\t\n\t\n\t\n","yoast_head_json":{"title":"Th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn c\u00e0ng","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/kiencang.net\/thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php\/","og_locale":"vi_VN","og_type":"article","og_title":"Th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP • Ki\u1ebfn c\u00e0ng","og_description":"H\u00f4m nay Ki\u1ebfn c\u00e0ng s\u1ebd c\u00f9ng b\u1ea1n th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai v\u1edbi c\u00e1c ph\u00e9p t\u00ednh c\u1ed9ng tr\u1eeb nh\u00e2n chia \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP. \u00dd t\u01b0\u1edfng l\u00e0 t\u00f4i s\u1ebd t\u1ea1o 3 \u00f4 input nh\u1eadp d\u1eef li\u1ec7u: \u00d4 \u0111\u1ea7u ti\u00ean l\u00e0 bi\u1ebfn s\u1ed1 th\u1ee9 nh\u1ea5t. \u00d4 ti\u1ebfp theo l\u00e0 to\u00e1n t\u1eed: l\u00e0 m\u1ed9t trong …","og_url":"https:\/\/kiencang.net\/thuc-hanh-lam-may-tinh-bo-tui-don-gian-bang-php\/","og_site_name":"Ki\u1ebfn c\u00e0ng","article_author":"https:\/\/www.facebook.com\/anhducnguyen87\/","article_published_time":"2013-08-24T03:36:00+00:00","og_image":[{"url":"https:\/\/i2.wp.com\/freehost.page\/wp-content\/uploads\/2021\/02\/cong-tru-nhan-chia.png?resize=530%2C111&ssl=1"}],"author":"Nguy\u1ec5n \u0110\u1ee9c Anh","twitter_card":"summary_large_image","twitter_misc":{"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi":"Nguy\u1ec5n \u0110\u1ee9c Anh","\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc":"4 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T\u00f4i th\u00edch Content, SEO, Ads, T\u0103ng t\u1ed1c website v\u00e0 Th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed. B\u00ean c\u1ea1nh b\u00e0i t\u1ef1 vi\u1ebft, t\u00f4i c\u0169ng d\u1ecbch nhi\u1ec1u n\u1ed9i dung th\u00fa v\u1ecb c\u1ee7a c\u00e1c t\u00e1c gi\u1ea3 kh\u00e1c nhau. FB c\u00e1 nh\u00e2n: facebook.com\/anhducnguyen87. 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Nh\u01b0 v\u1eady l\u00e0 xong, b\u1ea1n \u0111\u00e3 th\u1ef1c hi\u1ec7n th\u00e0nh c\u00f4ng l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP.<\/p>\n\n\n\n
(*) C\u00f3 m\u1ed9t c\u00e1ch kh\u00e1c l\u00e0 \u1edf trang action.php b\u1ea1n th\u1ef1c hi\u1ec7n chuy\u1ec3n h\u01b0\u1edbng v\u1ec1 trang index.php nh\u01b0 v\u1eady \u0111\u1ee1 m\u1ea5t c\u00f4ng t\u1ea1o l\u1ea1i giao di\u1ec7n \u1edf trang action.php, nh\u01b0ng n\u1ebfu th\u1ebf ch\u00fang ta c\u1ea7n t\u1ea1o SESSION \u0111\u1ec3 khi chuy\u1ec3n t\u1eeb trang n\u00e0y sang trang kh\u00e1c c\u00e1c bi\u1ebfn kh\u00f4ng b\u1ecb m\u1ea5t gi\u00e1 tr\u1ecb.<\/p>\n","protected":false},"excerpt":{"rendered":"
H\u00f4m nay Ki\u1ebfn c\u00e0ng s\u1ebd c\u00f9ng b\u1ea1n th\u1ef1c h\u00e0nh l\u00e0m m\u00e1y t\u00ednh b\u1ecf t\u00fai v\u1edbi c\u00e1c ph\u00e9p t\u00ednh c\u1ed9ng tr\u1eeb nh\u00e2n chia \u0111\u01a1n gi\u1ea3n b\u1eb1ng PHP. \u00dd t\u01b0\u1edfng l\u00e0 t\u00f4i s\u1ebd t\u1ea1o 3 \u00f4 input nh\u1eadp d\u1eef li\u1ec7u: \u00d4 \u0111\u1ea7u ti\u00ean l\u00e0 bi\u1ebfn s\u1ed1 th\u1ee9 nh\u1ea5t. \u00d4 ti\u1ebfp theo l\u00e0 to\u00e1n t\u1eed: l\u00e0 m\u1ed9t trong …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[238],"tags":[],"yoast_head":"\n