shandanjay · November 29, 2017 13:15
diff --git a/regex.php b/regex.php
 <?php

 $valid = '64-8681'; // BAC-1488
 $invalid = '00-8681'; // A1C-3422
 $re = '/^([a-zA-Z]{1,3}|((?!0*-)[0-9]{1,3}))-[0-9]{4}(?<!0{4})/m';
 echo preg_match($re, $valid); //true
	<?php

	$valid = '64-8681'; // BAC-1488
	$invalid = '00-8681'; // A1C-3422
	$re = '/^([a-zA-Z]{1,3}\|((?!0*-)[0-9]{1,3}))-[0-9]{4}(?<!0{4})/m';
	echo preg_match($re, $valid); //true