Discuz!字符串裁剪函数cutstr介绍

来源：互联网发布：人工智能对社会编辑：程序博客网时间：2024/05/29 11:19

函数定义位置：
\source\function\function_core.php
函数定义：

function cutstr($string, $length, $dot = ' ...') {if(strlen($string) <= $length) {return $string;}$pre = chr(1);$end = chr(1);$string = str_replace(array('&', '"', '<', '>'), array($pre.'&'.$end, $pre.'"'.$end, $pre.'<'.$end, $pre.'>'.$end), $string);$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, $n);} else {$_length = $length - 1;for($i = 0; $i < $length; $i++) {if(ord($string[$i]) <= 127) {$strcut .= $string[$i];} else if($i < $_length) {$strcut .= $string[$i].$string[++$i];}}}$strcut = str_replace(array($pre.'&'.$end, $pre.'"'.$end, $pre.'<'.$end, $pre.'>'.$end), array('&', '"', '<', '>'), $strcut);$pos = strrpos($strcut, chr(1));if($pos !== false) {$strcut = substr($strcut,0,$pos);}return $strcut.$dot;}

使用说明
cutstr($string, $length, $dot = ' ...')
$string：要裁剪的字符串
$length：返回长度
$dot：替换截掉部分的结尾字符串

0 0