php截取一定长度的字符串
function ssubstr( $string , $length , $dot = ' ...' ) { global $charset ; if ( strlen ( $string ) <= $length ) { return $string ; } $string = str_replace ( array ( '&' , '"' , '<' , '>' ), array ( '&' , '"' , '<' , '>' ), $string ); $strcut = '' ; if ( strtolower ( $charset ) == 'utf-8' ) { $n = $tn = $noc = 0; while ( $n < strlen ( $string )) { $t = ord( $string [ $n ]); if ( $t == 9 || $t == 10 || (32 <= $t && $t <= 126)) { $tn = 1; $n ++; $noc ++; } elseif (194 <= $t && $t <= 223) { $tn = 2; $n += 2; $noc += 2; } elseif (224 <= $t && $t < 239) { $tn = 3; $n += 3; $noc += 2; } elseif (240 <= $t && $t <= 247) { $tn = 4; $n += 4; $noc += 2; } elseif (248 <= $t && $t <= 251) { $tn = 5; $n += 5; $noc += 2; } elseif ( $t == 252 || $t == 253) { $tn = 6; $n += 6; $noc += 2; } else { $n ++; } if ( $noc >= $length ) { break ; } } if ( $noc > $length ) { $n -= $tn ; } $strcut = substr ( $string , 0, $n ); } else { for ( $i = 0; $i < $length ; $i ++) { $strcut .= ord( $string [ $i ]) > 127 ? $string [ $i ]. $string [++ $i ] : $string [ $i ]; } } $strcut = str_replace ( array ( '&' , '"' , '<' , '>' ), array ( '&' , '"' , '<' , '>' ), $strcut ); return $strcut . $dot ; } 截取一定长度的字符串（该函数对gb2312使用有效） <? function wordscut( $string , $length , $sss =0) { if ( strlen ( $string ) > $length ) { if ( $sss ){ $length = $length - 3; $addstr =@# ...@#; } for ( $i = 0; $i < $length ; $i ++) { if (ord( $string [ $i ]) > 127) { $wordscut .= $string [ $i ]. $string [ $i + 1]; // $i ++; //开源软件:phpfensi测试数据 } else { $wordscut .= $string [ $i ]; } } return $wordscut . $addstr ; } return $string ; } ?>查看更多关于php截取一定长度的字符串 - php函数的详细内容...
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