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<?php $test1 = '07511 111111'; $test2 = '+447511 111111'; $test3 = '+44 (0) 7511 111111'; //step 1 - reduce it to digits: preg_match_all('(?![\+][0-9+])', $test1, $digits); var_dump($digits);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_match_all(): Compilation failed: quantifier does not follow a repeatable item at offset 0 in /in/SYpRn on line 8 NULL

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