PHP method to intercept Chinese text strings without garbled characters_PHP tutorial

Many PHP beginners use the substr() function or the mb_substr() function to intercept characters. The first Chinese character must be garbled, and the second one has poor performance. I have summarized a few custom ones below. Example of intercepting Chinese text strings without garbled characters.

Example 1

         elseif(function_exists('iconv_substr')) {                return iconv_substr($str,$start,$length,$charset);

The code is as follows

代码如下

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function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true)     {         if(function_exists("mb_substr"))             return mb_substr($str, $start, $length, $charset);         elseif(function_exists('iconv_substr')) {             return iconv_substr($str,$start,$length,$charset);         }         $re['utf-8']   = "/[x01-x7f]|[xc2-xdf][x80-xbf]|[xe0-xef][x80-xbf]{2}|[xf0-xff][x80-xbf]{3}/";         $re['gb2312'] = "/[x01-x7f]|[xb0-xf7][xa0-xfe]/";         $re['gbk']    = "/[x01-x7f]|[x81-xfe][x40-xfe]/";         $re['big5']   = "/[x01-x7f]|[x81-xfe]([x40-x7e]|xa1-xfe])/";         preg_match_all($re[$charset], $str, $match);         $slice = join("",array_slice($match[0], $start, $length));         if($suffix) return $slice."…";         return $slice;     }

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代码如下

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//$start：指定开始截取字符串的位置；$length指定截取字符的长度 function substr2($string, $start, $length) { $len = strlen($string); if($len > $length) {    $str = '';    $len1 = $start + $length; //截取到原字符串的位置    for($i=$start; $i<$len1; $i++) { if(ord(substr($string, $i, 2)) > 0xa0) //在ASCII中，0xa0表示汉字的开始     {      $str.=substr($string, $i, 2);      $i++;     }     else     {      $str.=substr($string, $i, 1);     }    }    return $str.'...'; } else {    return $string; } } ?>

function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true)

{

If(function_exists("mb_substr"))

代码如下	复制代码
function chinesesubstr($str, $start, $len){ $strlen = $start + $len; for($i=0; $i<$strlen; $i++){ if(ord(substr($str, $i, 1)) > 0xa0){      $tmpstr .= substr($str, $i, 2);      $i++;     }else{      $tmpstr .= substr($str, $i, 1);     }    }    return $tmpstr; } $str = "waiting for you 等wait你back"; echo chinesesubstr($str, 0, 19) ?>

                return mb_substr($str, $start, $length, $charset);

} $re['utf-8'] = "/[x01-x7f]|[xc2-xdf][x80-xbf]|[xe0-xef][x80-xbf]{2}|[xf0-xff][x80 -xbf]{3}/";           $re['gb2312'] = "/[x01-x7f]|[xb0-xf7][xa0-xfe]/";           $re['gbk']                                                                                                             = "/[x01-x7f]|[x81-xfe][x40-xfe]/";           $re['big5']     = "/[x01-x7f]|[x81-xfe]([x40-x7e]|xa1-xfe])/"; Preg_match_all($re[$charset], $str, $match);           $slice = join("",array_slice($match[0], $start, $length)); If($suffix) return $slice."…";           return $slice; } Example 2

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//$start: Specifies the starting position to intercept the string; $length specifies the length of the intercepted characters <🎜> function substr2($string, $start, $length)<🎜> {<🎜> $len = strlen($string);<🎜> if($len > $length) { $str = ''; $len1 = $start + $length; //Intercept to the position of the original string for($i=$start; $i<$len1; $i++)<🎜> {<🎜> If(ord(substr($string, $i, 2)) > 0xa0) //In ASCII, 0xa0 represents the beginning of Chinese characters { $str.=substr($string, $i, 2); $i++; } else { $str.=substr($string, $i, 1); } } Return $str.'...'; } else { Return $string; } } ?> I’ll add a simple one with the same idea (2010-5-31)

The code is as follows

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function chinesesubstr($str, $start, $len){<🎜> $strlen = $start + $len;<🎜> for($i=0; $i<$strlen; $i++){<🎜> If(ord(substr($str, $i, 1)) > 0xa0){ $tmpstr .= substr($str, $i, 2); $i++; }else{ $tmpstr .= substr($str, $i, 1); } } Return $tmpstr; } $str = "waiting for you wait for you back"; echo chinesesubstr($str, 0, 19) ?> http://www.bkjia.com/PHPjc/632772.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/632772.htmlTechArticleMany PHP beginners use the substr() function or mb_substr() function to intercept characters. Chapter One Chinese character must be garbled, and the second one has poor performance. I have summarized a few customizations below...