Question

I need some help with preg_replace. At my website I need to delete some things I don’t need.
Here is an example:

 
THIS IS WHAT I NEED

Ok, all I need from this string is: the text inside caption="THIS TEXT",
every thing else I need to be deleted, I have used Google and tried some examples but nothing.
Maybe I need to use another function, but from what I have read on the internet this should replace .

Please help me, it’s very important.
Thank you.

EDIT:

The code has some other things that i have forgot.

<a href="http://localhost/111baneease1.jpg">
<img class="size-full wp-image-100951" title="zjarr_banese1" src="http://localhost/111baneease1.jpg" alt="eeeeeeeeeeeeeeeee" width="448" height="308" />
</a>
eaaaaaaaaaaaaaaaaaa

So i need to get the CAPTION text and delete every thing in

but not

<a href="http://localhost/111baneease1.jpg">
<img class="size-full wp-image-100951" title="zjarr_banese1" src="http://localhost/111baneease1.jpg" alt="eeeeeeeeeeeeeeeee" width="448" height="308" />
</a>

also want delete

eaaaaaaaaaaaaaaaaaa

too.

Answer 1

This regex :

$result = preg_replace('/\)(.*?)\1.*?\[\/caption\]/', '$2', $subject);

will output :

THIS IS WHAT I NEED

when applied to :

[caption id="attachment_100951" align="alignleft" width="448" caption="THIS IS WHAT I NEED"] 

Updated answer based on your updated question :

$result = preg_replace('%\)(.*?)\1\s*\](.*?)\[/caption\]%s', '$2\n$3', $subject);

The above regex applied to :

[caption id="attachment_100951" align="alignleft" width="448" caption="eaaaaaaaaaaaaaaaaaa"]
<a href="http://localhost/111baneease1.jpg">
<img class="size-full wp-image-100951" title="zjarr_banese1" src="http://localhost/111baneease1.jpg" alt="eeeeeeeeeeeeeeeee" width="448" height="308" />
</a>

Will output :

    eaaaaaaaaaaaaaaaaaa

<a href="http://localhost/111baneease1.jpg">
<img class="size-full wp-image-100951" title="zjarr_banese1" src="http://localhost/111baneease1.jpg" alt="eeeeeeeeeeeeeeeee" width="448" height="308" />
</a>

I am not sure if this is exactly what you wanted. Of course you can use the regex to match and do whatever you want with groups $2 and $3…