Check for all uppercase, numbers and symbols

[themistral]

Hi guys,

 

I'm really struggling with what I think should be quite a simple regex.

 

I need to check if a string contains only uppercase, numbers and symbols.

 

I have tried 2 ways - neither of which seem to work.

 

echo preg_match("/^([A-Z0-9.,'])$/", $string);
echo !preg_match("/^([a-z])$/", $string);

 

This is occurring within a loop - some entries contain lowercase characters but all results are returning false for the first expression and true for the second.

 

Any help would be gratefully appreciated!

[JAY6390]

echo preg_match("/^([A-Z0-9.,']+)$/", $string);

[themistral]

Thanks JAY6390!

 

At first that wasn't working...then I added a space and that now seems to work!

 

echo preg_match("/^([A-Z0-9.,' ]+)$/", $string);

 

[JAY6390]

you'll only need the space in there if you want to allow spaces as well

Also, you don't need the ( ) around it unless you want to capture the string (which is kinda pointless since you are supplying the string in the first place)