{"id":14142,"date":"2021-08-23T16:36:02","date_gmt":"2021-08-23T16:36:02","guid":{"rendered":"https:\/\/freehost.page\/?p=14142"},"modified":"2021-08-23T16:36:02","modified_gmt":"2021-08-23T16:36:02","slug":"kiem-tra-vi-tri-dau-thanh","status":"publish","type":"post","link":"https:\/\/kiencang.net\/kiem-tra-vi-tri-dau-thanh\/","title":{"rendered":"H\u00e0m PHP d\u00f9ng \u0111\u1ec3 ki\u1ec3m tra m\u1ed9t t\u1eeb n\u00e0o \u0111\u00f3 c\u00f3 c\u1ea7n chuy\u1ec3n v\u1ecb tr\u00ed d\u1ea5u thanh hay kh\u00f4ng"},"content":{"rendered":"\n<p>Phi\u00ean b\u1ea3n n\u00e2ng c\u1ea5p cho h\u00e0m chuy\u1ec3n d\u1ea5u ti\u1ebfng Vi\u1ec7t \u0111\u00e3 c\u00f3 \u1edf \u0111\u00e2y: <a href=\"https:\/\/kiencang.net\/php-chuyen-dau-thanh-v12\/\" target=\"_blank\" rel=\"noreferrer noopener\">Vi\u1ebft l\u1ea1i h\u00e0m PHP chuy\u1ec3n d\u1ea5u thanh cho t\u1eeb ti\u1ebfng Vi\u1ec7t (v1.2)<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>Trong b\u00e0i vi\u1ebft n\u00e0y t\u00f4i s\u1ebd n\u00f3i v\u1ec1 2 h\u00e0m b\u1eaft l\u1ed7i th\u1ea3 d\u1ea5u thanh trong ti\u1ebfng Vi\u1ec7t. \u0110\u1ea7u v\u00e0o l\u00e0 t\u1eeb \u0111\u01a1n. Trong tr\u01b0\u1eddng h\u1ee3p b\u1ea1n b\u1eaft l\u1ed7i m\u1ed9t chu\u1ed7i th\u00ec c\u1ea7n t\u00e1ch n\u00f3 ra r\u1ed3i \u0111\u01b0a v\u00e0o h\u00e0m.<\/p>\n\n\n\n<p>H\u00e0m th\u1ee9 nh\u1ea5t s\u1eed d\u1ee5ng Regex, n\u00f3 nh\u01b0 sau:<\/p>\n\n\n\n<ul><li>Bi\u1ebfn \u0111\u1ea7u v\u00e0o \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean l\u00e0 <code>$str<\/code>;<\/li><li>Bi\u1ebfn <code>$bat_loi<\/code> m\u1eb7c \u0111\u1ecbnh \u0111\u1ec3 l\u00e0 0 (kh\u00f4ng c\u00f3 l\u1ed7i). Khi so kh\u1edbp th\u1ea5y l\u1ed7i bi\u1ebfn n\u00e0y m\u1edbi chuy\u1ec3n th\u00e0nh 1;<\/li><li>T\u1eeb <code>$r<\/code> \u0111\u1ebfn <code>$r8<\/code> l\u00e0 c\u00e1c <a href=\"https:\/\/kiencang.net\/cu-phap-co-ban-regex\/\" target=\"_blank\" rel=\"noreferrer noopener\">bi\u1ec3u th\u1ee9c ch\u00ednh quy regex<\/a> \u0111\u1ec3 b\u1eaft l\u1ed7i d\u1ea5u trong t\u1eebng tr\u01b0\u1eddng h\u1ee3p, trong m\u00e3 m\u1eabu t\u00f4i c\u00f3 ch\u00fa th\u00edch \u0111\u1ec3 d\u1ec5 hi\u1ec3u h\u01a1n;<\/li><li>Cu\u1ed1i m\u00e3 l\u00e0 ph\u1ea7n ki\u1ec3m tra v\u1edbi c\u00e2u l\u1ec7nh \u0111i\u1ec1u ki\u1ec7n <code>if<\/code>, ch\u1ec9 c\u1ea7n so kh\u1edbp ch\u00ednh x\u00e1c m\u1ed9t trong 8 bi\u1ec3u th\u1ee9c l\u00e0 n\u00f3 tr\u1ea3 v\u1ec1 k\u1ebft qu\u1ea3 d\u1ea5u thanh \u0111ang \u0111\u1eb7t sai;<\/li><\/ul>\n\n\n\n<p>PS: ti\u1ebfng Vi\u1ec7t hi\u1ec7n ch\u01b0a th\u1ed1ng nh\u1ea5t quy t\u1eafc \u0111\u1eb7t d\u1ea5u thanh, trong m\u00e3 b\u00ean d\u01b0\u1edbi t\u00f4i s\u1eed d\u1ee5ng quy t\u1eafc ph\u1ed5 bi\u1ebfn h\u01a1n.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$str = \"h\u00f9ynh\";\n\nfunction kiem_tra_dau_loi($str) {\n$bat_loi=0;\n\n\/\/ b\u1eaft l\u1ed7i g\u00edo, q\u00faa, q\u00fay-----------------\n\n$r='\/^(g\u00ed|g\u00ec|g\u1ec9|g\u0129|g\u1ecb]|q\u00fa|q\u00f9|q\u1ee7|q\u0169|q\u1ee5|q\u1ee9|q\u1eeb|q\u1eed|q\u1eef|q\u1ef1)(a|\u0103|\u00e2|e|\u00ea|o|\u00f4|\u01a1|u|\u01b0|i|y)(&#91;a-z]*)\/'; \n\n\/\/---------------------------------------\n\n\/\/ b\u1eaft l\u1ed7i to\u00e0, ke\u00f3, ho\u1ea1-----------------------------\n\n$r2='\/&#91;bcdfhjklmnprstvxz\u0111]*&#91;^gq](a|\u0103|\u00e2|e|o|\u00f4|\u01a1|u|\u01b0|i|y)(\u00e1|\u00e0|\u1ea3|\u00e3|\u1ea1|\u1eaf|\u1eb1|\u1eb3|\u1eb5|\u1eb7|\u1ea5|\u1ea7|\u1ea9|\u1eab|\u1ead|\u00e9|\u00e8|\u1ebb|\u1ebd|\u1eb9|\u00f3|\u00f2|\u1ecf|\u00f5|\u1ecd|\u1ed1|\u1ed3|\u1ed5|\u1ed7|\u1ed9|\u00fa|\u00f9|\u1ee7|\u0169|\u1ee5|\u1ee9|\u1eeb|\u1eed|\u1eef|\u1ef1|\u00fd|\u1ef3|\u1ef7|\u1ef9|\u1ef5|\u00ed|\u00ec|\u1ec9|\u0129|\u1ecb)$\/'; \n\n\/\/---------------------------------------------------\n\n\/\/ b\u1eaft l\u1ed7i t\u00f2an, c\u1eeb\u01a1i, h\u00f2ang-------------\n\n$r3='\/&#91;bcdfhjklmnprstvxz\u0111]*&#91;^a\u0103\u00e2eo\u00f4\u01a1u\u01b0iy](\u00e1|\u00e0|\u1ea3|\u00e3|\u1ea1|\u1eaf|\u1eb1|\u1eb3|\u1eb5|\u1eb7|\u1ea5|\u1ea7|\u1ea9|\u1eab|\u1ead|\u00e9|\u00e8|\u1ebb|\u1ebd|\u1eb9|\u00f3|\u00f2|\u1ecf|\u00f5|\u1ecd|\u1ed1|\u1ed3|\u1ed5|\u1ed7|\u1ed9|\u00fa|\u00f9|\u1ee7|\u0169|\u1ee5|\u1ee9|\u1eeb|\u1eed|\u1eef|\u1ef1|\u00fd|\u1ef3|\u1ef7|\u1ef9|\u1ef5|\u00ed|\u00ec|\u1ec9|\u0129|\u1ecb)(a|\u0103|\u00e2|\u00ea|e|o|\u00f4|\u01a1|u|\u01b0|i|y)(a|\u0103|\u00e2|e|o|\u00f4|\u01a1|u|\u01b0|i|y|b|c|d|f|g|h|k|l|m|n|p|q|r|s|t|v|x)+\/'; \n\n\/\/---------------------------------------\n\n\/\/ b\u1eaft l\u1ed7i c\u01b0\u01a1\u00ed, t\u01b0\u01a1\u00ed, cu\u00f4\u00ed---------------------------\n\n$r4='\/&#91;bcdfghjklmnpqrstvxz\u0111]*(a|\u0103|\u00e2|\u00ea|e|o|\u00f4|\u01a1|u|\u01b0|i|y)(a|\u0103|\u00e2|\u00ea|e|o|\u00f4|\u01a1|u|\u01b0|i|y)(\u00e1|\u00e0|\u1ea3|\u00e3|\u1ea1|\u1eaf|\u1eb1|\u1eb3|\u1eb5|\u1eb7|\u1ea5|\u1ea7|\u1ea9|\u1eab|\u1ead|\u00e9|\u00e8|\u1ebb|\u1ebd|\u1eb9|\u00f3|\u00f2|\u1ecf|\u00f5|\u1ecd|\u1ed1|\u1ed3|\u1ed5|\u1ed7|\u1ed9|\u00fa|\u00f9|\u1ee7|\u0169|\u1ee5|\u1ee9|\u1eeb|\u1eed|\u1eef|\u1ef1|\u00fd|\u1ef3|\u1ef7|\u1ef9|\u1ef5|\u00ed|\u00ec|\u1ec9|\u0129|\u1ecb)&#91;bcdfghjklmnpqrstvxz]*\/';\n\n\/\/----------------------------------------------------\n\n\/\/ b\u1eaft l\u1ed7i \u00ea kh\u00f4ng c\u00f3 d\u1ea5u trong t\u1eeb c\u00f3 d\u1ea5u\n\n$r5='\/\u00ea&#91;a-z]*(\u00e1|\u00e0|\u1ea3|\u00e3|\u1ea1|\u1eaf|\u1eb1|\u1eb3|\u1eb5|\u1eb7|\u1ea5|\u1ea7|\u1ea9|\u1eab|\u1ead|\u00e9|\u00e8|\u1ebb|\u1ebd|\u1eb9|\u00f3|\u00f2|\u1ecf|\u00f5|\u1ecd|\u1ed1|\u1ed3|\u1ed5|\u1ed7|\u1ed9|\u00fa|\u00f9|\u1ee7|\u0169|\u1ee5|\u1ee9|\u1eeb|\u1eed|\u1eef|\u1ef1|\u00fd|\u1ef3|\u1ef7|\u1ef9|\u1ef5|\u00ed|\u00ec|\u1ec9|\u0129|\u1ecb)\/';\n\n$r6='\/(\u00e1|\u00e0|\u1ea3|\u00e3|\u1ea1|\u1eaf|\u1eb1|\u1eb3|\u1eb5|\u1eb7|\u1ea5|\u1ea7|\u1ea9|\u1eab|\u1ead|\u00e9|\u00e8|\u1ebb|\u1ebd|\u1eb9|\u00f3|\u00f2|\u1ecf|\u00f5|\u1ecd|\u1ed1|\u1ed3|\u1ed5|\u1ed7|\u1ed9|\u00fa|\u00f9|\u1ee7|\u0169|\u1ee5|\u1ee9|\u1eeb|\u1eed|\u1eef|\u1ef1|\u00fd|\u1ef3|\u1ef7|\u1ef9|\u1ef5|\u00ed|\u00ec|\u1ec9|\u0129|\u1ecb)&#91;a-z]*\u00ea\/';\n\n\/\/---------------------------------------\n\n\/\/ b\u1eaft l\u1ed7i \u01a1 kh\u00f4ng c\u00f3 d\u1ea5u trong t\u1eeb c\u00f3 d\u1ea5u\n\n$r7='\/(\u00e1|\u00e0|\u1ea3|\u00e3|\u1ea1|\u1eaf|\u1eb1|\u1eb3|\u1eb5|\u1eb7|\u1ea5|\u1ea7|\u1ea9|\u1eab|\u1ead|\u00e9|\u00e8|\u1ebb|\u1ebd|\u1eb9|\u00f3|\u00f2|\u1ecf|\u00f5|\u1ecd|\u1ed1|\u1ed3|\u1ed5|\u1ed7|\u1ed9|\u00fa|\u00f9|\u1ee7|\u0169|\u1ee5|\u1ee9|\u1eeb|\u1eed|\u1eef|\u1ef1|\u00fd|\u1ef3|\u1ef7|\u1ef9|\u1ef5|\u00ed|\u00ec|\u1ec9|\u0129|\u1ecb)&#91;a-z]*\u01a1\/';\n\n$r8='\/\u01a1&#91;a-z]*(\u00e1|\u00e0|\u1ea3|\u00e3|\u1ea1|\u1eaf|\u1eb1|\u1eb3|\u1eb5|\u1eb7|\u1ea5|\u1ea7|\u1ea9|\u1eab|\u1ead|\u00e9|\u00e8|\u1ebb|\u1ebd|\u1eb9|\u00f3|\u00f2|\u1ecf|\u00f5|\u1ecd|\u1ed1|\u1ed3|\u1ed5|\u1ed7|\u1ed9|\u00fa|\u00f9|\u1ee7|\u0169|\u1ee5|\u1ee9|\u1eeb|\u1eed|\u1eef|\u1ef1|\u00fd|\u1ef3|\u1ef7|\u1ef9|\u1ef5|\u00ed|\u00ec|\u1ec9|\u0129|\u1ecb)\/';\n\n\n if (preg_match($r, $str) || preg_match($r2, $str) || preg_match($r3, $str) || preg_match($r4, $str) || preg_match($r5, $str) || preg_match($r6, $str) || preg_match($r7, $str) || preg_match($r8, $str)) {$bat_loi=1;}\n\nreturn $bat_loi;\n}\n\necho kiem_tra_dau_loi($str); \/\/ s\u1ebd cho k\u1ebft qu\u1ea3 1<\/code><\/pre>\n\n\n\n<p>Regex tuy tr\u00f4ng h\u01a1i kh\u00f3 hi\u1ec3u, nh\u01b0ng m\u00e3 s\u00e1ng, d\u1ec5 nh\u00ecn.<\/p>\n\n\n\n<p>C\u00e1ch th\u1ee9 hai vi\u1ebft theo ki\u1ec3u ph\u00e2n t\u00edch th\u00f4ng th\u01b0\u1eddng, m\u00e3 tr\u00f4ng kh\u00e1 r\u1ed1i, v\u00e0 c\u1ea7n ch\u00fa th\u00edch nhi\u1ec1u m\u1edbi hi\u1ec3u \u0111\u01b0\u1ee3c. C\u00e1ch n\u00e0y v\u1eabn l\u00e0 c\u00e1ch c\u01a1 b\u1ea3n h\u01a1n, v\u00ec kh\u00f4ng ch\u1ec9 gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c chuy\u1ec7n b\u1eaft l\u1ed7i, m\u00e0 ch\u00ednh n\u00f3 <a href=\"https:\/\/kiencang.net\/kiem-tra-vi-tri-dau-thanh\/\" target=\"_blank\" rel=\"noreferrer noopener\">b\u1ed5 sung th\u00eam m\u00e3 s\u1ebd gi\u00fap s\u1eeda \u0111\u01b0\u1ee3c c\u00e1c d\u1ea5u thanh ti\u1ebfng Vi\u1ec7t \u0111\u1eb7t kh\u00f4ng \u0111\u00fang chu\u1ea9n<\/a>.<\/p>\n\n\n\n<p>H\u00e0m b\u00ean d\u01b0\u1edbi c\u0169ng y\u00eau c\u1ea7u nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n h\u01a1n tr\u01b0\u1edbc khi x\u1eed l\u00fd:<\/p>\n\n\n\n<ul><li>T\u1eeb c\u00f3 t\u1ed1i \u0111a 6 k\u00fd t\u1ef1;<\/li><li>T\u1eeb ch\u1ec9 c\u00f3 1 d\u1ea5u thanh, v\u00ed d\u1ee5 t\u1eeb <code>ho\u1ea1<\/code>, <code>th\u1ee7\u01a1<\/code>, <code>h\u00f2ang<\/code> s\u1ebd \u0111\u01b0\u1ee3c b\u1eaft l\u1ed7i, c\u00f2n t\u1eeb nh\u01b0 h\u00f2\u00e0ng s\u1ebd kh\u00f4ng l\u00e0m g\u00ec c\u1ea3, nh\u1eefng t\u1eeb nh\u01b0 v\u1eady c\u1ea7n ti\u1ec1n x\u1eed l\u00fd ki\u1ec3m tra ch\u00ednh t\u1ea3 tr\u01b0\u1edbc;<\/li><li>Kho\u1ea3ng c\u00e1ch gi\u1eefa m\u1ed9t nguy\u00ean \u00e2m c\u00f3 d\u1ea5u v\u00e0 m\u1ed9t nguy\u00ean \u00e2m kh\u00f4ng c\u00f3 d\u1ea5u l\u00e0 kh\u00f4ng qu\u00e1 2 k\u00fd t\u1ef1, v\u00ec nh\u1eefng t\u1eeb nh\u01b0 v\u1eady c\u0169ng c\u1ea7n ti\u1ec1n x\u1eed l\u00fd ch\u00ednh t\u1ea3 tr\u01b0\u1edbc, v\u00ec kh\u1ea3 n\u0103ng cao l\u00e0 n\u00f3 sai ch\u00ednh t\u1ea3 nghi\u00eam tr\u1ecdng;<\/li><\/ul>\n\n\n\n<p>T\u00f3m l\u1ea1i tr\u01b0\u1edbc khi d\u00f9ng h\u00e0m n\u00e0y t\u1eeb c\u1ea7n \u0111\u00fang chu\u1ea9n t\u01b0\u01a1ng \u0111\u1ed1i r\u1ed3i, ch\u1ec9 c\u00f2n g\u1eb7p l\u1ed7i v\u1ec1 d\u1ea5u thanh, v\u00e0 n\u00f3 s\u1ebd x\u1eed l\u00fd n\u1ed1t.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>function mang_hex_dau() {\n     $hex_dau = array(\"cc80\",\"cc81\",\"cc83\",\"cc89\",\"cca3\");\n\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\n\nfunction mang_codau() { \/\/ m\u1ea3ng nguy\u00ean \u00e2m c\u00f3 d\u1ea5u, m\u00e3 h\u00f3a ph\u1ed5 th\u00f4ng\n    $cd=array(\"\u00e1\",\"\u00e0\",\"\u1ea3\",\"\u00e3\",\"\u1ea1\",\"\u1eaf\",\"\u1eb1\",\"\u1eb3\",\"\u1eb5\",\"\u1eb7\",\"\u1ea5\",\"\u1ea7\",\"\u1ea9\",\"\u1eab\",\"\u1ead\",\"\u00e9\",\"\u00e8\",\"\u1ebb\",\"\u1ebd\",\"\u1eb9\",\"\u1ebf\",\"\u1ec1\",\"\u1ec3\",\"\u1ec5\",\"\u1ec7\",\"\u00f3\",\"\u00f2\",\"\u1ecf\",\"\u00f5\",\"\u1ecd\",\"\u1ed1\",\"\u1ed3\",\"\u1ed5\",\"\u1ed7\",\"\u1ed9\",\"\u1edd\",\"\u1edb\",\"\u1edf\",\"\u1ee1\",\"\u1ee3\",\"\u00fa\",\"\u00f9\",\"\u1ee7\",\"\u0169\",\"\u1ee5\",\"\u1ee9\",\"\u1eeb\",\"\u1eed\",\"\u1eef\",\"\u1ef1\",\"\u00fd\",\"\u1ef3\",\"\u1ef7\",\"\u1ef9\",\"\u1ef5\",\"\u00ed\",\"\u00ec\",\"\u1ec9\",\"\u0129\",\"\u1ecb\");\nreturn $cd;\n}\n\n\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\n\nfunction mang_khongdau() { \/\/ m\u1ea3ng nguy\u00ean \u00e2m kh\u00f4ng d\u1ea5u\n    $kd=array(\"a\",\"\u00e2\",\"e\",\"\u00ea\",\"u\",\"\u01b0\",\"o\",\"\u00f4\",\"\u01a1\",\"i\",\"y\");\nreturn $kd;    \n}\n\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\n\n\/\/ \u0111\u1ea3o d\u1ea5u t\u1eeb $x sang $y, t\u1ee9c l\u00e0 sau khi chuy\u1ec3n $y s\u1ebd c\u00f3 d\u1ea5u. Th\u00f4ng tin \u0111\u1ea7u v\u00e0o l\u00e0 ch\u1eef c\u00e1i \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a theo ki\u1ec3u ph\u1ed5 th\u00f4ng\nfunction chdau($x,$y){ \/\/\u0111\u1ea7u v\u00e0o $x c\u00f3 d\u1ea5u, $y kh\u00f4ng c\u00f3 d\u1ea5u\n    $dx=array(\"cc80\",\"cc81\",\"cc83\",\"cc89\",\"cca3\"); \/\/ m\u00e3 h\u00f3a d\u1ea5u ti\u1ebfng Vi\u1ec7t, ph\u1ea3i \u0111\u01b0a v\u00e0o trong h\u00e0m m\u1edbi d\u00f9ng \u0111\u01b0\u1ee3c\n    $hx=bin2hex(mahoa_itdung($x)); \/\/ chuy\u1ec3n sang m\u00e3 hex \u0111\u1ec3 t\u00ecm d\u1ea5u\n    $hy=bin2hex(mahoa_itdung($y)); \/\/ chuy\u1ec3n sang m\u00e3 hex \u0111\u1ec3 gh\u00e9p d\u1ea5u\n    $i=0;$dau=array();\n    foreach ($dx as $dxm) { \/\/ t\u00e1ch m\u1ea3ng d\u1ea5u\n                  $k='\/'.$dxm.'\/';\n                  if (preg_match($k, $hx)) {\n                      $dau&#91;$i]=$dxm;\n                      $hy=$hy.$dau&#91;$i]; \/\/ th\u00eam d\u1ea5u cho $hy, n\u00f3 v\u1eabn \u0111ang \u1edf d\u1ea1ng m\u00e3 hex\n                      $xd='\/'.$dau&#91;$i].'\/';\n                      $hx=preg_replace($xd,'',$hx); \/\/ kh\u1eed d\u1ea5u c\u1ee7a $hx; n\u00f3 v\u1eabn \u0111ang \u1edf d\u1ea1ng hex\n                      $i++;\n                  } \/\/ t\u00ecm ra d\u1ea5u c\u1ee7a $x\n    }\n    $dauma=chuyen_ma_hoa(hex2bin($hx)).'.'.chuyen_ma_hoa(hex2bin($hy)); \/\/ c\u00f3 d\u1ea5u\n    \nreturn $dauma; \/\/ tr\u1ea3 v\u1ec1 m\u1ea3ng, bi\u1ebfn \u0111\u1ea7u ti\u00ean l\u00e0 kh\u00f4ng d\u1ea5u, bi\u1ebfn th\u1ee9 2 l\u00e0 c\u00f3 d\u1ea5u\n}\n\nfunction kiem_tra_chuyen_dau($str) {\n$chuyen_dau = 0; \/\/ m\u1eb7c \u0111\u1ecbnh l\u00e0 kh\u00f4ng chuy\u1ec3n d\u1ea5u, th\u1ecfa \u0111i\u1ec1u ki\u1ec7n m\u1edbi chuy\u1ec3n sang 1   \n\/\/ y\u00eau c\u1ea7u \u0111\u1ea7u v\u00e0o l\u00e0 ti\u1ebfng Vi\u1ec7t kh\u00f4ng d\u1ea5u \u0111\u00e3 \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a sang m\u00e3 ph\u1ed5 bi\u1ebfn, c\u1ea7n x\u1eed l\u00fd d\u00ednh t\u1eeb tr\u01b0\u1edbc, c\u00f3 th\u1ec3 c\u1ea7n x\u1eed l\u00fd tr\u01b0\u1edbc c\u1ea3 l\u1ed7i ch\u00ednh t\u1ea3\n$tvtd = mang_codau(); \/\/ c\u00e1c nguy\u00ean \u00e2m c\u00f3 d\u1ea5u\n$tkd = mang_khongdau(); \/\/ c\u00e1c nguy\u00ean \u00e2m kh\u00f4ng d\u1ea5u\n$dx = mang_hex_dau(); \/\/ m\u00e3 h\u00f3a hex c\u1ee7a d\u1ea5u ti\u1ebfng Vi\u1ec7t\n\n$tt = preg_split('\/\/u', $str, -1, PREG_SPLIT_NO_EMPTY); \/\/ t\u00e1ch t\u1eeb\n$skt = count($tt)-1; \/\/ t\u00ecm s\u1ed1 l\u01b0\u1ee3ng k\u00fd t\u1ef1, tr\u1eeb \u0111i 1 \u0111\u1ec3 ti\u1ec7n so v\u1edbi m\u1ea3ng b\u1eaft \u0111\u1ea7u t\u1eeb 0\n\n$tcd = array(); \/\/ m\u1ea3ng t\u1eeb c\u00f3 d\u1ea5u\n$ml = 0; \/\/ \u0111\u1ebfm s\u1ed1 l\u01b0\u1ee3ng t\u1eeb c\u00f3 d\u1ea5u \n\nforeach ($tt as $ttm) { \/\/ $ttm l\u00fac n\u00e0y l\u00e0 c\u00e1c k\u00fd t\u1ef1 c\u1ee7a string\n         foreach ($tvtd as $kt) { \/\/$kt l\u00fac n\u00e0y l\u00e0 c\u00e1c k\u00fd t\u1ef1 ti\u1ebfng Vi\u1ec7t c\u00f3 d\u1ea5u\n                                 if ($ttm==$kt) {$tcd&#91;$ml]=$ttm; $ml++;}}} \/\/ t\u00ecm s\u1ed1 l\u01b0\u1ee3ng t\u1eeb c\u00f3 d\u1ea5u \n                                 \n         $tg=0; \/\/ bi\u1ebfn trung gian\n         \nif ($ml==1 &amp;&amp; $skt &lt; 6) { \/\/c\u00f3 \u0111\u00fang m\u1ed9t d\u1ea5u thanh m\u1edbi x\u1eed l\u00fd ti\u1ebfp, gi\u1edbi h\u1ea1n c\u1ea3 s\u1ed1 k\u00fd t\u1ef1 \u0111\u1ec3 tr\u00e1nh l\u1ed7i d\u00ednh t\u1eeb, t\u1ed1i \u0111a 6 k\u00fd t\u1ef1\n\nforeach ($tt as $ttm2) { \n    if ($ttm2==$tcd&#91;0]) { \/\/ d\u1ea5u lu\u00f4n n\u1eb1m trong ph\u1ea7n t\u1eed \u0111\u1ea7u ti\u00ean c\u1ee7a m\u1ea3ng c\u00f3 d\u1ea5u\n        $vtcd=$tg; \/\/ v\u1ecb tr\u00ed c\u00f3 d\u1ea5u \n    } $tg++;\n} \/\/ ra \u0111\u01b0\u1ee3c v\u1ecb tr\u00ed c\u1ee7a nguy\u00ean \u00e2m c\u00f3 d\u1ea5u t\u00ednh t\u1eeb tr\u00e1i qua\n\n\n\/\/ t\u1ea1o ngo\u1ea1i l\u1ec7, nh\u1eefng nguy\u00ean \u00e2m n\u00e0y n\u1ebfu c\u00f3 d\u1ea5u th\u00ec kh\u00f4ng c\u1ea7n chuy\u1ec3n\n$ngle=($tt&#91;$vtcd]!=\"\u1ebf\" &amp;&amp; $tt&#91;$vtcd]!=\"\u1ec1\" &amp;&amp; $tt&#91;$vtcd]!=\"\u1ec3\" &amp;&amp; $tt&#91;$vtcd]!=\"\u1ec5\" &amp;&amp; $tt&#91;$vtcd]!=\"\u1ec7\" &amp;&amp; $tt&#91;$vtcd]!=\"\u1edb\" &amp;&amp; $tt&#91;$vtcd]!=\"\u1edd\" &amp;&amp; $tt&#91;$vtcd]!=\"\u1edf\" &amp;&amp; $tt&#91;$vtcd]!=\"\u1ee1\" &amp;&amp; $tt&#91;$vtcd]!=\"\u1ee3\");\n\n\n$mkd=array(); $slkd=0;\n\/\/\u0111\u1ebfm s\u1ed1 l\u01b0\u1ee3ng nguy\u00ean \u00e2m kh\u00f4ng d\u1ea5u\n\nforeach ($tt as $ttm3) {\n                        foreach ($tkd as $kt3) {\n                                                if ($ttm3==$kt3) \n                                                                {$mkd&#91;$slkd]=$ttm3; $slkd++;}}} \n\/\/ m\u1ea3ng ch\u1ec9 c\u00e1c v\u1ecb tr\u00ed nguy\u00ean \u00e2m kh\u00f4ng d\u1ea5u\n\n\n            if ($slkd==1) { \/\/ tr\u01b0\u1eddng h\u1ee3p c\u00f3 m\u1ed9t nguy\u00ean \u00e2m kh\u00f4ng d\u1ea5u\n                            $tg4=0; \/\/ t\u00ecm v\u1ecb tr\u00ed c\u1ee7a nguy\u00ean \u00e2m kh\u00f4ng d\u1ea5u\n                            foreach ($tt as $ttm4) {\n                                                    if ($ttm4==$mkd&#91;0]) {\n                                                                         $vtkd=$tg4;} $tg4++;} \/\/ ra \u0111\u01b0\u1ee3c v\u1ecb tr\u00ed c\u1ee7a nguy\u00ean \u00e2m kh\u00f4ng d\u1ea5u\n                          $kc = abs($vtcd - $vtkd); \/\/ l\u1ea5y gi\u00e1 tr\u1ecb kho\u1ea3ng c\u00e1ch t\u1eeb, \u0111\u1ec3 ph\u00f2ng tr\u01b0\u1eddng h\u1ee3p dinh t\u1eeb. C\u00e1c nguy\u00ean \u00e2m c\u00e1ch nhau t\u1ed1i \u0111a 1 t\u1eeb, do v\u1eady $kc kh\u00f4ng l\u1edbn h\u01a1n 2\n\n                          if (($tt&#91;$vtkd]==\"\u00ea\" || $tt&#91;$vtkd]==\"\u01a1\") &amp;&amp; $kc &lt; 3) {$chuyen_dau = 1;} \/\/ th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 chuy\u1ec3n d\u1ea5u\n\n\n                          else {\n\n                                        \/\/ so s\u00e1nh s\u1ed1 l\u01b0\u1ee3ng k\u00fd t\u1ef1 v\u1edbi v\u1ecb tr\u00ed c\u1ee7a c\u00e1c nguy\u00ean \u00e2m\n                                        if ($skt == $vtcd || $skt == $vtkd) {\/\/t\u1ee9c l\u00e0 kh\u00f4ng c\u00f3 ph\u1ee5 \u00e2m \u0111\u1eb1ng sau, v\u1eady th\u00ec \u00e2m c\u00f3 d\u1ea5u s\u1ebd \u0111\u1ee9ng \u0111\u1eb1ng tr\u01b0\u1edbc m\u1edbi \u0111\u00fang chu\u1ea9n, nh\u01b0ng c\u00f3 ngo\u1ea1i l\u1ec7 v\u1edbi c\u00e1c \u00e2m c\u00f3 d\u1ea5u \u00ea v\u00e0 \u01a1 v\u00e0 gi, qu\n                                                        if ($vtcd &gt; $vtkd &amp;&amp; $kc &lt; 3) { \/\/ t\u1ee9c l\u00e0 sai chu\u1ea9n c\u00f3 d\u1ea5u \u0111ang \u0111\u1eebng \u0111\u1eb1ng sau\n                                                                                    \/\/ tuy nhi\u00ean c\u1ea7n ki\u1ec3m tra t\u1eeb c\u00f3 d\u1ea5u c\u00f3 ph\u1ea3i l\u00e0 \u00ea ho\u1eb7c \u01a1 kh\u00f4ng, n\u1ebfu kh\u00f4ng th\u00ec m\u1edbi ph\u1ea3i \u0111\u1ea3o d\u1ea5u\n                                                                                    $gq=$tt&#91;0].$tt&#91;1]; \/\/ l\u1ea5y 2 k\u00fd t\u1ef1 \u0111\u1ea7u ti\u00ean \u0111\u1ec3 ki\u1ec3m tra n\u00f3 c\u00f3 tr\u00f9ng gi v\u00e0 qu kh\u00f4ng\n                                                                                                    if ($ngle &amp;&amp; $gq != \"gi\" &amp;&amp; $gq != \"qu\") { \/\/ th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n chuy\u1ec3n d\u1ea5u\n                                                                                                    \/\/b\u00e2y gi\u1edd s\u1ebd \u0111\u1ea3o d\u1ea5u, d\u00f9ng h\u00e0m cho ti\u1ec7n, v\u00ec vi\u1ec7c n\u00e0y ph\u1ea3i l\u1eb7p l\u1ea1i\n                                                                                                          $chuyen_dau = 1;\n                                                                                                    }             \n                                                        }\n                                                        \n                                                        if ($vtcd &lt; $vtkd &amp;&amp; $kc &lt; 3) {\n                                                                \/\/ d\u1ea5u \u1edf gi v\u00e0 qu, v\u00ed d\u1ee5 g\u00eda q\u1ee5a\n                                                                 $gq=$tt&#91;0].$tt&#91;1]; \/\/ l\u1ea5y 2 k\u00fd t\u1ef1 \u0111\u1ea7u ti\u00ean \u0111\u1ec3 ki\u1ec3m tra n \u00f3 c\u00f3 tr\u00f9ng gi v\u00e0 qu kh\u00f4ng\n                                                                                    if ($gq == \"g\u00ed\" || $gq == \"g\u00ec\" || $gq == \"g\u1ec9\" || $gq == \"g\u0129\" || $gq == \"g\u1ecb\") {\n                                                                                        $chuyen_dau=1;}\n                                                                                        \n                                                                                    if ($gq == \"q\u00fa\" || $gq == \"q\u00f9\" || $gq == \"q\u1ee7\" || $gq == \"q\u0169\" || $gq == \"q\u1ee5\") {\n                                                                                        $chuyen_dau=1;}    \n                                                        }\n                                        }\n\n                                        if ($skt &gt; $vtcd &amp;&amp; $skt &gt; $vtkd &amp;&amp; $kc &lt; 3) { \/\/ t\u1ee9c l\u00e0 c\u00f3 ph\u1ee5 \u00e2m \u0111\u1eb1ng sau \/\/ quy t\u1eafc th\u00f4ng th\u01b0\u1eddng s\u1ebd l\u00e0 nguy\u00ean \u00e2m sau c\u00f3 d\u1ea5u, tuy nhi\u00ean c\u00f3 ngo\u1ea1i l\u1ec7 v\u1edbi \u00ea v\u00e0 \u01a1 c\u00f3 d\u1ea5u\n                                         \/\/ t\u1ee9c l\u00e0 n\u1ebfu v\u1ecb tr\u00ed c\u00f3 d\u1ea5u nh\u1ecf h\u01a1n v\u1ecb tr\u00ed kh\u00f4ng d\u1ea5u l\u00e0 c\u1ea7n ch\u1ec9nh, v\u00ed d\u1ee5 nh\u01b0 h\u00f9ynh\n                                                       if (($vtcd &lt; $vtkd) &amp;&amp; $ngle)   {\/\/ c\u1ea7n ph\u1ea3i v\u01b0\u1ee3t qua ngo\u1ea1i l\u1ec7 \u00ea \u01a1 c\u00f3 d\u1ea5u trong m\u1ecdi tr\u01b0\u1eddng h\u1ee3p\n                                                                                        \/\/b\u00e2y gi\u1edd s\u1ebd \u0111\u1ea3o d\u1ea5u, d\u00f9ng h\u00e0m cho ti\u1ec7n, v\u00ec vi\u1ec7c n\u00e0y ph\u1ea3i l\u1eb7p l\u1ea1i\n                                                                                                    $chuyen_dau = 1;\n                                                       }\n                                        }\n                          }\n            }\n\n \n\n            if ($slkd==2) { \/\/ tr\u01b0\u1eddng h\u1ee3p c\u00f3 hai nguy\u00ean \u00e2m kh\u00f4ng d\u1ea5u\n                            $tg5=0; \/\/ t\u00ecm v\u1ecb tr\u00ed c\u1ee7a nguy\u00ean \u00e2m kh\u00f4ng d\u1ea5u th\u1ee9 nh\u1ea5t\n                            $k=0; \/\/ tr\u00e1nh tr\u00f9ng nguy\u00ean \u00e2m, v\u00ed d\u1ee5 gi\u1ecfi, 2 \u00e2m i n\u00e0y s\u1ebd c\u00f3 v\u1ecb tr\u00ed t\u1ed1i \u0111a l\u00e0 3\n                            foreach ($tt as $ttm5) {\n                                        if ($ttm5==$mkd&#91;0] &amp;&amp; $k&lt;1) { \/\/t\u00e1ch m\u1ea3ng kh\u00f4ng d\u1ea5u\n                                            $vtkd1=$tg5; \/\/ ra \u0111\u01b0\u1ee3c v\u1ecb tr\u00ed c\u1ee7a nguy\u00ean \u00e2m kh\u00f4ng d\u1ea5u\n                                            $k++;\n                                        }\n                                        if ($ttm5==$mkd&#91;1]) {\n                                            $vtkd2=$tg5;\n                                        }\n                                            $tg5++;                              \n                            } \/\/ nguy\u00ean \u00e2m kh\u00f4ng d\u1ea5u th\u1ee9 2\n                                \/\/ v\u1edbi tr\u01b0\u1eddng h\u1ee3p c\u00f3 3 nguy\u00ean th\u00ec d\u1ea5u ph\u1ea3i \u0111\u1eb7t \u1edf nguy\u00ean \u00e2m th\u1ee9 2\n                                \/\/ ch\u00fang ta s\u1ebd ph\u1ea3i chuy\u1ec3n trong tr\u01b0\u1eddng h\u1ee3p v\u1ecb tr\u00ed c\u00f3 d\u1ea5u \u1edf v\u1ecb tr\u00ed 1 ho\u1eb7c 3 nh\u01b0 t\u1ee9\u01a1i ho\u1eb7c t\u01b0\u01a1\u00ed\n                                \/\/ ngo\u1ea1i l\u1ec7 v\u1edbi \u00ea v\u00e0 \u01a1 c\u00f3 d\u1ea5u\n                            $kc = abs($vtcd - $vtkd2);\n                            $uut=0;\n\n                            if (($tt&#91;$vtkd1]==\"\u00ea\" || $tt&#91;$vtkd1]==\"\u01a1\") &amp;&amp; $kc &lt; 3) {$chuyen_dau=1; $uut=1;}\n\n                            if (($tt&#91;$vtkd2]==\"\u00ea\" || $tt&#91;$vtkd2]==\"\u01a1\") &amp;&amp; $kc &lt; 3) {$chuyen_dau=1; $uut=1;}  \n\n                            if ($uut!=1) {\n\n                                            if ((($vtcd&gt;$vtkd1 &amp;&amp; $vtcd&gt;$vtkd2)) &amp;&amp; $kc &lt; 3) { \/\/c\u00f3 d\u1ea5u \u0111ang \u1edf v\u1ecb tr\u00ed 3\n                                            \/\/ c\u1ea7n ph\u1ea3i v\u01b0\u1ee3t qua ngo\u1ea1i l\u1ec7 v\u1edbi \u00ea v\u00e0 \u01a1 c\u00f3 d\u1ea5u\n                                                    if ($ngle) { \n                                                    \/\/b\u00e2y gi\u1edd s\u1ebd \u0111\u1ea3o d\u1ea5u, d\u00f9ng h\u00e0m cho ti\u1ec7n, v\u00ec vi\u1ec7c n\u00e0y ph\u1ea3i l\u1eb7p l\u1ea1i\n                                                                $chuyen_dau = 1;\n                                                    }}\n\n\n                                            if ((($vtcd&lt;$vtkd1 &amp;&amp; $vtcd&lt;$vtkd2)) &amp;&amp; $kc &lt; 3) { \/\/c\u00f3 d\u1ea5u \u0111ang \u1edf v\u1ecb tr\u00ed 1\n                                                                            \/\/ c\u1ea7n ph\u1ea3i v\u01b0\u1ee3t qua ngo\u1ea1i l\u1ec7 v\u1edbi \u00ea v\u00e0 \u01a1 c\u00f3 d\u1ea5u\n                                                                            if ($ngle) { \n                                                                                        \/\/b\u00e2y gi\u1edd s\u1ebd \u0111\u1ea3o d\u1ea5u, d\u00f9ng h\u00e0m cho ti\u1ec7n, v\u00ec vi\u1ec7c n\u00e0y ph\u1ea3i l\u1eb7p l\u1ea1i\n                                                                                        $chuyen_dau = 1;\n                                                                             }                         \n                                             }\n\n                            }\n\n            }\n}\nreturn $chuyen_dau; \/\/ \u0111\u1ec3 bi\u1ebft c\u00f3 n\u00ean chuy\u1ec3n d\u1ea5u hay kh\u00f4ng\n}<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Phi\u00ean b\u1ea3n n\u00e2ng c\u1ea5p cho h\u00e0m chuy\u1ec3n d\u1ea5u ti\u1ebfng Vi\u1ec7t \u0111\u00e3 c\u00f3 \u1edf \u0111\u00e2y: Vi\u1ebft l\u1ea1i h\u00e0m PHP chuy\u1ec3n d\u1ea5u thanh cho t\u1eeb ti\u1ebfng Vi\u1ec7t (v1.2) Trong b\u00e0i vi\u1ebft n\u00e0y t\u00f4i s\u1ebd n\u00f3i v\u1ec1 2 h\u00e0m b\u1eaft l\u1ed7i th\u1ea3 d\u1ea5u thanh trong ti\u1ebfng Vi\u1ec7t. \u0110\u1ea7u v\u00e0o l\u00e0 t\u1eeb \u0111\u01a1n. Trong tr\u01b0\u1eddng h\u1ee3p b\u1ea1n b\u1eaft l\u1ed7i &hellip;<\/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":"<!-- This site is optimized with the Yoast SEO plugin v21.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>H\u00e0m PHP d\u00f9ng \u0111\u1ec3 ki\u1ec3m tra m\u1ed9t t\u1eeb n\u00e0o \u0111\u00f3 c\u00f3 c\u1ea7n chuy\u1ec3n v\u1ecb tr\u00ed d\u1ea5u thanh hay kh\u00f4ng &#8226; Ki\u1ebfn c\u00e0ng<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kiencang.net\/kiem-tra-vi-tri-dau-thanh\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"H\u00e0m PHP d\u00f9ng \u0111\u1ec3 ki\u1ec3m tra m\u1ed9t t\u1eeb n\u00e0o \u0111\u00f3 c\u00f3 c\u1ea7n chuy\u1ec3n v\u1ecb tr\u00ed d\u1ea5u thanh hay kh\u00f4ng &#8226; Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"og:description\" content=\"Phi\u00ean b\u1ea3n n\u00e2ng c\u1ea5p cho h\u00e0m chuy\u1ec3n d\u1ea5u ti\u1ebfng Vi\u1ec7t \u0111\u00e3 c\u00f3 \u1edf \u0111\u00e2y: Vi\u1ebft l\u1ea1i h\u00e0m PHP chuy\u1ec3n d\u1ea5u thanh cho t\u1eeb ti\u1ebfng Vi\u1ec7t (v1.2) Trong b\u00e0i vi\u1ebft n\u00e0y t\u00f4i s\u1ebd n\u00f3i v\u1ec1 2 h\u00e0m b\u1eaft l\u1ed7i th\u1ea3 d\u1ea5u thanh trong ti\u1ebfng Vi\u1ec7t. \u0110\u1ea7u v\u00e0o l\u00e0 t\u1eeb \u0111\u01a1n. 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