Validate String (Regular Expression)

[Ashish Sood]

HI,

 

I working on the form where i want to restrict the user to input only characters,digit, . , and white space. i want to validate 2 text field and one text area.

if(!preg_match("/^[a-zA-Z0-9].*$/",$field1))            {                $turnmsg = "<b><font color='red'> Only letters,spaces & .  are allowed </font></b>";            }                        if(!preg_match("/^[a-z A-Z].*$/",$field2))            {                $turnmsg = "<b><font color='red'> Only letters,spaces & .  are allowed </font></b>";            }                        if(!preg_match("/^[a-z A-Z].*$/",$textarea1))            {                $turnmsg = "<b><font color='red'> Only letters,spaces & .  are allowed </font></b>";            }

The problem is that when i applied preg_match on single field with if condition its working fine , but with the mutiple if condition its fail. any alternatives or do i needs any modificaiton into my code.

 

 

Thanks ,

Ashish

Edited November 3, 2013 by Ashish Sood

[justsomeguy]

How does it fail? The code looks fine in general, but I'm not sure you're using the correct patterns. The error messages are all the same, but you're using 2 different patterns, you're not checking for the same thing every time. Also, the "." character in a regular expression is a meta-character that matches anything except a newline. So the first pattern says that the string needs to start with a letter or number, and then it can contain any other character except a newline.