Php Chinese encoding judgment code-php Tutorial

Php Chinese encoding judgment code

Preg_replace ("/([\ x80-\ xff])/", "", $ str ); Preg_replace ("/([u4e00-u9fa5])/", ", $ str ); Example: php Chinese encoding judgment. // Determine whether the content contains Chinese characters-gbk (php) Function check_is_chinese ($ s ){ Return preg_match ('/[\ x80-\ xff]./', $ s ); } // Obtain the string length-gbk (php) Function gb_strlen ($ str ){ $ Count = 0; For ($ I = 0; $ I $ S = substr ($ str, $ I, 1 ); If (preg_match ("/[\ x80-\ xff]/", $ s) ++ $ I; + + $ Count; } Return $ count; } // Truncate the string-gbk (php) Function gb_substr ($ str, $ len ){ $ Count = 0; For ($ I = 0; $ I If ($ count = $ len) break; If (preg_match ("/[\ x80-\ xff]/", substr ($ str, $ I, 1) ++ $ I; + + $ Count; } Return substr ($ str, 0, $ I ); } // Count the length of the string-utf8 (php) Function utf8_strlen ($ str ){ $ Count = 0; For ($ I = 0; $ I <strlen ($ str); $ I ++ ){ $ Value = ord ($ str [$ I]); If ($ value & gt; 127 ){ $ Count ++; If ($ value >=192 & $ value <= 223) $ I ++; Elseif ($ value >=224 & $ value <= 239) $ I = $ I + 2; Elseif ($ value >=240 & $ value <= 247) $ I = $ I + 3; Else die ('not a UTF-8 compatible string '); } $ Count ++; } Return $ count; } // Truncate the string-utf8 (php) Function utf8_substr ($ str, $ position, $ length ){ $ Start_position = strlen ($ str ); $ Start_byte = 0; $ End_position = strlen ($ str ); $ Count = 0; For ($ I = 0; $ I <strlen ($ str); $ I ++ ){ If ($ count >=$ position & $ start_position> $ I ){ $ Start_position = $ I; $ Start_byte = $ count; } If ($ count-$ start_byte)> = $ length ){ $ End_position = $ I; Break; } $ Value = ord ($ str [$ I]); If ($ value & gt; 127 ){ $ Count ++; If ($ value >=192 & $ value <= 223) $ I ++; Elseif ($ value >=224 & $ value <= 239) $ I = $ I + 2; Elseif ($ value >=240 & $ value <= 247) $ I = $ I + 3; Else die ('not a UTF-8 compatible string '); } $ Count ++; } Return (substr ($ str, $ start_position, $ end_position-$ start_position )); } // Determine whether there is Korean-UTF-8 (javascript) Function checkkoreachar (str ){ For (I = 0; I If (str. charcodeat (I)> 0x3130 & str. charcodeat (I) <0x318f) | (str. charcodeat (I)> = 0xac00 & str. charcodeat (I) <= 0xd7a3 ))){ Return true; } } Return false; } // Determine whether a Chinese character-gbk (javascript) exists) Function check_chinese_char (s ){ Return (s. length! = S. replace (/[^ \ x00-\ xff]/g, "**"). length ); }