php取文章内容前50字摘要

1.去掉转义和html标签

$newContent = strip_tags(stripslashes($_POST["content"]));

2.取掉两边多余的空格

$newContent = trim($newContent);

$patternArr = array("/s/","/ /");
$replaceArr = array("","");
$newContent = preg_replace($patternArr,$replaceArr,$newContent);

4.截取固定的长度

$newContent = mb_strcut($newContent,0,150,"utf-8");