Special Characters validation

[depojones]

Hi all,

 

How do I output an error if my input contains any whitespace and special characters. for instance, <script>, <object>, etc

 

 

[de.monkeyz]

regular expressions are what you need (google them). But for example, if you want to make sure a string only contains letters and numbers:

 

if(!preg_match('/^[A-Za-z0-0]*$/', $string))
{
   //if contained special characters
}

 

You can use that

[Psycho]

You need to be more explicit on "special characters". You can either specify specific characters NOT to allow or specify the characters that ARE allowed.

[depojones]

This is exactly what am looking for. Thanks for your contribution