Question

I tried looking around and thought i figured it out by using preg_match, but preg match gives me the error:

Warning: preg_match(): No ending delimiter ‘^’

here is my original code which php says is depreciated:

if(!eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $_POST['email'])) { 
    $erroR= "Invalid Email address"; 
} 

can someone explain what the ending delimiter ‘^’ is, and how to add it. thanks@

Answer 1

Swap eregi() with preg_match(), and add delimiters to the regular expression. I chose the standard / here, but you can use other characters.

if(!preg_match("/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$/", $_POST['email'])) { 
    $erroR= "Invalid Email address"; 
} 

The reason you get this warning…

Warning: preg_match(): No ending delimiter '^'

…is because preg_match() expects delimiters, and it assumed the ^ was being used, and it couldn’t match a trailing one.