check atleast one number and one letter in php string

[Nandini]

Hi

 

I want to check atleast one number and one letter in php string using regular expressions. I am using the followinf snippet. But thats not working me fine. Please help me. here is my code

 

$reg="/^[a-z0-9]{1,}$/";
if(preg_match($reg, $_POST['string']))
{
$e="String should be atleast one letter and one number";
}

 

pls help me out.

 

Thanq

[Nandini]

Ya i got a solution like this

$reg="/^.*(?=.{6,})(?=.*\\d)(?=.*[a-zA-Z]).*$/";

 

This will check minimum of 6 length and atleast one letter and one number

 

Thanq