preg_replace ?

[feha]

Hi

I have another problem with this regex ...

http://www.phpfreaks.com/forums/index.php/topic,268024.0.html

It works great for validation  (preg_match) but how if i want to use it as preg_replace ?

What do I need to change ?

/^[a-zA-Z0-9](?:[a-zA-Z0-9]|(?!--)-){1,48}[a-zA-Z0-9]$/

[JAY6390]

What exactly are you trying to replace?

[feha]

Hi

I would like if input string has other values than allowed with regex strip out  ...

 

example:

$original = preg_replace("/[^a-zA-Z0-9]/","",$original);  

this removes all non alphanummerics ...

 

but i want if user name starts 

with -  or end's with - also to be replaced ....

[cags]

I don't believe this can be achieved with a single pattern as you want to replace different things based on different situations which means you will probably need a collection of different pattern sets. For example, looking at your initial pattern you want the first character to be alphanumeric, so a pattern replace of any characters that aren't would be something like...

 

$pattern = '#^[^a-z0-9]+#i';
$replace = '';

 

You can then build up other required patterns from there.