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<?php preg_match_all('/\d/g', '123abc٠١٢٣٤٥٦٧٨٩', $matches); var_dump($matches);
based on rjjtD
Output for 5.2.0 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_match_all(): Unknown modifier 'g' in /in/gZ7ej on line 3 NULL
Output for hhvm-3.10.0 - 3.12.0
Warning: Unknown modifier 'g': [/\d/g] in /in/gZ7ej on line 3 NULL
Output for 4.3.11 - 5.1.6
Warning: preg_match_all(): Unknown modifier 'g' in /in/gZ7ej on line 3 array(0) { }
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier 'g' in /in/gZ7ej on line 3 array(0) { }