<?php $test1 = '07511 111111'; $test2 = '+447511 111111'; $test3 = '+44 (0) 7511 111111'; //step 1 - reduce it to digits: preg_match_all('([\+]{0,1}[0-9+])', $test1, $digits); $digits = implode($digits[0]); var_dump($digits);
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