Simple regex help

[gergy008]

Hi I'm still not that good with regex as I don't do it very often but can someone help my out please?

 

I need regex that will only allow alpha numberic characters and deny anything else, ^[a-zA-Z0-9]+$ doesn't seem to work.

 

Thanks for your help!!

[Alex]

~^[a-z0-9]+$~i

 

Would work. But you don't need regex for this. Just use ctype_alnum.

[gergy008]

~^[a-z0-9]+$~i

 

Would work. But you don't need regex for this. Just use ctype_alnum.

 

It's not exactly just for php, I'm going to be using it in javascript too 

[salathe]

doesn't seem to work.

 

What makes you think that?

[gergy008]

doesn't seem to work.

 

What makes you think that?

 

I use it in php too... The php version does the same thing as the javascript one, It recognises anything with a letter or a number in it, And doesn't reject if it has a symbol in it.

[Alex]

Sure it does, try this code:

 

if("test%".match('^[a-zA-Z0-9]+$')) {
    alert('matched');
} else {
    alert('did not match');
}

[salathe]

I use it in php too... The php version does the same thing as the javascript one, It recognises anything with a letter or a number in it, And doesn't reject if it has a symbol in it.

 

Show us a short sample code which reproduces the issue of not rejecting subject strings containing symbols.  The only non-alphanumeric symbol that should be allowed by that regex (in PHP/PCRE) is a trailing newline character.