How to convert the time from AM/PM to 24 hour format in PHP?

Question

For example, I have a time in this format:

eg. 

09:15 AM
04:25 PM
11:25 AM

How do I convert it to :

09:15
16:25
23:25


        

Answer 1

$time = '09:15 AM';

$chunks = explode(':', $time);
if (strpos( $time, 'AM') === false && $chunks[0] !== '12') {
    $chunks[0] = $chunks[0] + 12;
} else if (strpos( $time, 'PM') === false && $chunks[0] == '12') {
    $chunks[0] = '00';
}

echo preg_replace('/\s[A-Z]+/s', '', implode(':', $chunks));