Question

What would be regular expression for this : 10/04/2012 3:02 AM in php

I’m searching all day and can’t find any one.
I’m new to regular expressions.

Answer 1

\d means digit. If you only want to check the general format, then use

\d{1,2}/\d{1,2}/\d{4} \d{1,2}:\d{2} [AP]M

In PHP, to find a timestamp in the string $subject:

if (preg_match('%\d{1,2}/\d{1,2}/\d{4} \d{1,2}:\d{2} [AP]M%', $subject, $regs)) {
    $result = $regs[0];
}

If you need to check whether the entire string fits this format, use

if (preg_match('%^\d{1,2}/\d{1,2}/\d{4} \d{1,2}:\d{2} [AP]M$%', $subject)) {
    # Successful match
} 

instead (and then use a date library to check the date for validity).