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一个正则表达式的有关问题。有点不理解了

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Release： 2016-06-13 12:38:37
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一个正则表达式的问题。有点不理解了

<?php<br />
$a='<span class="ico-block"><a href="#"><img  src="http://www.oxford-royale.co.uk/2013/wp-content/themes/ora/images/ico19.png" / alt=" 一个正则表达式的有关问题。有点不理解了 " ></a></span><h2>';<br />
$a=preg_replace("/<[^>]+?>/","\\0\\2\\4\\5",$a);<br />
var_dump($a);<br />
?>
Copy after login


这个好像错了，请问错在哪里了？有点不明白了

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