PHP inserting some text before and after a string

Question

I'm pretty new to PHP and have a String which contains an HTML page. I'd need to insert some custom code BEFORE and AFTER any HR HTML tag. Example:

    <html>
    ....
     <p>INSERT HERE</p> 
     <hr class="pagebreak">
     <p>INSERT HERE</p> 

     <p>INSERT HERE</p> 
     <hr class="pagebreak">
     <p>INSERT HERE</p> 
    ....
    </html>

I've tried with several combinations of preg_replace and substr_replace, however I still couldn't manage to insert the custom code in all places I need. Anybody can help me to solve this puzzle ? P.s. I need to use PHP standard String functions- I cannot use any HTML parsing library since I don't have control over the PHP libraries available on the server. Thanks a lot Linda

Kyborek · Accepted Answer · 2012-03-18 17:04:17Z

2

All you need to get is good regular expression, assuming that you managed to get it work at least partially, you propably had bad expression (example would help). I tested this code for you and it should work on all your <hr>s:

$newtext=preg_replace("#(<hr[^>]*>)#s",$yourprefix."\${1}".$yoursuffix,$oldtext);

variable oldtext is what you had before, new text is what you want, and prefix and suffix is what you want to add around hr tag

answered Mar 18, 2012 at 17:04

Kyborek

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2 Comments

Max Korn Over a year ago

Thank you very much, both your solution and and inhan workerd perfectly. Sorry I have just built my profile so I cannot add you any score for your reply :-(

Kyborek Over a year ago

No problem, at least you got solution, just notice the difference, my expression works even if <hr> takes multiple lines, however it is case sensitive so it wont work for <HR>, if you want to change it, just put #i at the end instead

inhan · Accepted Answer · 2012-03-18 17:05:03Z

2

$before = '<p>Before the hr tag</p>';
$after = '<p>After the hr tag</p>';

$str = preg_replace('/(<hr(.*?)>)/i',$before.'$1'.$after,$str);

answered Mar 18, 2012 at 17:05

inhan

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1 Comment

Max Korn Over a year ago

Thank you also for your great suggestion inhan !

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