<?php $map = [ 'BACK PACK BBP160800103 G086-1 8#.JPG', 'BACKPACK BBP160500010 G114-3#1.JPG', 'WSL160800024-WSL160800025 L83-5.JPG', 'bogey', 'IA041017 L83-5.JPG' ]; $result = []; foreach ($map as $string) { array_push($result, ...preg_match_all('/\b(?:BBP|WSL|IA)\d{6,9}\b/', $string, $m) ? $m[0] : []); } var_export($result);
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