我该如何删除html标签

im using php and i wanna know how to delete when <p><a><img></a></p>

from this:

<p>
    <strong>Lorem</strong>
    Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
</p>

<p>Lorem ipsum dolor
    <a href="xxxx" target="yyy">sit amet
    </a>, consectetur adipisicing elit, sed do eiusmod
</p>

<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
    <img alt="" height="xxx" src="yyy" width="zzz" />
</p>

<p>
    <a href="xxx" target="_blank">
    <img alt="" height="xxx" src="yyy" width="zzz" />
    </a>
</p>

to this:

<p>
    <strong>Lorem</strong>
    Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
</p>

<p>Lorem ipsum dolor
    <a href="xxxx" target="yyy">sit amet
    </a>, consectetur adipisicing elit, sed do eiusmod
</p>

<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
    <img alt="" height="xxx" src="yyy" width="zzz" />
</p>

<a href="xxx" target="_blank">
 <img alt="" height="xxx" src="yyy" width="zzz" />
</a>

i just wanna delete tag <p></p> when <p><a><img></a></p> i've tried using preg_replace(); function but i cant get it could you please help me, thanks

<?php

$html = <<< EOFHTML
<p>
    <strong>Lorem</strong>
    Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
</p>

<p>Lorem ipsum dolor
    <a href="xxxx" target="yyy">sit amet
    </a>, consectetur adipisicing elit, sed do eiusmod
</p>

<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
    <img alt="" height="xxx" src="yyy" width="zzz" />
</p>

<p class="foo">
    <a href="xxx" target="_blank">
    <img alt="" height="xxx" src="yyy" width="zzz" />
    </a>
</p>
EOFHTML;


$html = preg_replace("'(<p[^>]*>)([^<]*<a[^>]*>[^<]*<img[^>]*>[^<]*</a>[^<]*)(</p>)'sim", "$2", $html);


echo $html;

Hi You can use this but note that it will only work when you have <p></p> with no class or id or any other attribute like <p class="myclass">(not work for this).

<?php
$text ='<p>
   <a href="http://xxx" target="_blank">
       <img alt="xxx" height="xxx" src="xxx" width="xx" />
   </a>
</p>';
$text=str_ireplace('<p>','',$text);
$text=str_ireplace('</p>','',$text);
echo $text;

?>

`str_ireplace` `function` returns a string or an array with all occurrences of search in subject (ignoring case) replaced with the given replace value.

for more info read http://php.net/manual/en/function.str-ireplace.php

PHP 5+ comes with a built in DOM Parser. PHP DOMDocument

It can be used to find, remove, and add elements.