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PHP 清理字符串中所有无用标签

WBOY
WBOYOriginal
2016-05-25 16:46:341094browse

很多时候需要输出一些 “纯” 字符串，也就是去除任何杂质（例如 Html 标签、空格之类的文本），输出的摘要就是如此，下面的这个函数可以帮你实现着一点：

<?php
function Bing_string_cleanr($string) {
    $string = trim($string);
    $string = strip_tags($string);
    $string = htmlspecialchars($string, ENT_QUOTES, &#39;UTF-8&#39;);
    $string = str_replace("n", "", $string);
    $string = trim($string);
    return $string;
}
?>

使用方法：

echo Bing_string_cleanr( &#39;内 容 <br> <html> asdfeiuonsdfje&#39; );

删除空白

<?php
$str = " This line containstliberal rn use of whitespace.nn";
// First remove the leading/trailing whitespace
//去掉开始和结束的空白
$str = trim($str);
// Now remove any doubled-up whitespace
//去掉跟随别的挤在一块的空白
$str = preg_replace(&#39;/s(?=s)/&#39;, &#39;&#39;, $str);
// Finally, replace any non-space whitespace, with a space
//最后，去掉非space 的空白，用一个空格代替
$str = preg_replace(&#39;/[nrt]/&#39;, &#39; &#39;, $str);
// Echo out: &#39;This line contains liberal use of whitespace.&#39;
echo "<pre class="brush:php;toolbar:false">{$str}
"; ?>


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