php 字符串截取函数(可以自动清除网页标签)

php 字符串截取函数完整代码。

<?php
/**
* 字符串截取函数 自动清除网页标签
* site http://www.jb200.com
**/
Function str_cut($string, $length = 80, $etc = '...', $code = 'UTF-8')
{
$string = strip_tags(preg_replace('!s+!', $string, ' '));
if ($length == 0)
return '';
if ($code == 'UTF-8') {
$pa = "/[x01-x7f]|[xc2-xdf][x80-xbf]|xe0[xa0-xbf][x80-xbf]|[xe1-xef][x80-xbf][x80-xbf]|xf0[x90-xbf][x80-xbf][x80-xbf]|[xf1-xf7][x80-xbf][x80-xbf][x80-xbf]/";
}
else {
$pa = "/[x01-x7f]|[xa1-xff][xa1-xff]/";
}
preg_match_all($pa, $string, $t_string);
if (count($t_string[0]) > $length)
return join('', array_slice($t_string[0], 0, $length)) . $etc;
return join('', array_slice($t_string[0], 0, $length));
}
?>