<div>
This will work in most cases:<br />

<pre><code id="code-176819">$searchFor = &quot;content&quot;;
$replaceWith = &quot;xyz&quot;;
echo preg_replace( &quot;#&lt;\[.*?$searchFor.*?\]&gt;#i&quot;,$replaceWith, $str);
</code></pre>
</div>


This will work in most cases:


$searchFor = "content";
$replaceWith = "xyz";
echo preg_replace( "#<\[.*?$searchFor.*?\]>#i",$replaceWith, $str);


<div>
this is one example for check if on if is valid or not.<br />
ereg(&quot;([12]?[0-9]?[0-9].[1<wbr />2]?[0-9]?[<wbr />0-9].[12]?<wbr />[0-9]?[0-9<wbr />].[12]?[0-<wbr />9]?[0-9])&quot;<wbr />, $dirty, $clean);<br />
<br />

</div>


this is one example for check if on if is valid or not.
ereg("([12]?[0-9]?[0-9].[12]?[0-9]?[0-9].[12]?[0-9]?[0-9].[12]?[0-9]?[0-9])", $dirty, $clean);



<div>
<div class="content wysiwyg-content">
I want to find this or any acceptable variation of it:<br />
<br />
&nbsp; &nbsp; &nbsp; &nbsp;&lt;[content]&gt;<br />
<br />
And replace it with:<br />
<br />
&nbsp; &nbsp; &nbsp; &nbsp;xyz<br />
<br />
This should be case insensitive and should allow ANYTHING between &quot;content&quot; and the brackets.<br />
<br />
So all these should be replaced:<br />
<br />
&nbsp; &nbsp; &nbsp; &nbsp;&lt;[content]&gt;<br />
&nbsp; &nbsp; &nbsp; &nbsp;&lt;[CONTENT]&gt;<br />
&nbsp; &nbsp; &nbsp; &nbsp;&lt;[*ContenT*]&gt;<br />
&nbsp; &nbsp; &nbsp; &nbsp;&lt;[ content &nbsp;/ ]&gt;<br />
<br />
This must be PHP4 compatible.
</div>
</div>


I want to find this or any acceptable variation of it:

       <[content]>

And replace it with:

       xyz

This should be case insensitive and should allow ANYTHING between "content" and the brackets.

So all these should be replaced:

       <[content]>
       <[CONTENT]>
       <[*ContenT*]>
       <[ content  / ]>

This must be PHP4 compatible.

Regex to replace &lt;[content]&gt;

PHP is a widely-used server-side scripting language especially suited for web development, powering tens of millions of sites from Facebook to personal WordPress blogs. PHP is often paired with the MySQL relational database, but includes support for most other mainstream databases. By utilizing different Server APIs, PHP can work on many different web servers as a server-side scripting language.

Regex to replace &lt;[content]&gt;

Regex to replace <[content]>