$re = '/(0[1-9]|1[012])\/([0][1-9]]|[12]\d|3[01])\/\d{2}\s[A-Z][a-z]{2}\s(\d|1[012])[ap]m/';
$str = 'he was out of city in period of 10/10/16 Sat 1am - 10/16/16 Sun 3am ₨350.00/hr - you have to remain onlines, which will enable you to meet him.
';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php