php中文編碼判斷代碼

preg_replace(”/([\x80-\xff])/”,”",$str); preg_replace(”/([u4e00-u9fa5])/”,”",$str); 複製代碼 例子，php中文編碼判斷。 //判斷內容裡有沒有中文-gbk (php) function check_is_chinese($s){ return preg_match('/[\x80-\xff]./', $s); } //擷取字串長度-gbk (php) function gb_strlen($str){ $count = 0; for($i=0; $i$s = substr($str, $i, 1); if (preg_match("/[\x80-\xff]/", $s)) ++$i; ++$count; } return $count; } //截取字串字串-gbk (php) function gb_substr($str, $len){ $count = 0; for($i=0; $iif($count == $len) break; if(preg_match("/[\x80-\xff]/", substr($str, $i, 1))) ++$i; ++$count; } return substr($str, 0, $i); } //統計字串長度-utf8 (php) function utf8_strlen($str) { $count = 0; for($i = 0; $i < strlen($str); $i++){ $value = ord($str[$i]); if($value > 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 $count; } //截取字串-utf8(php) function utf8_substr($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 > 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)); } //判斷是否是有韓文-utf-8 (javascript) function checkkoreachar(str) { for(i=0; iif(((str.charcodeat(i) > 0x3130 && str.charcodeat(i) < 0x318f) || (str.charcodeat(i) >= 0xac00 && str.charcodeat(i) <= 0xd7a3))) { return true; } } return false; } //判斷是否有中文字元-gbk (javascript) function check_chinese_char(s){ return (s.length != s.replace(/[^\x00-\xff]/g,"**").length); } 複製代碼

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