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<?php $strings = [ "quanity*price/2+tax", "quanity*price/2" ]; foreach ($strings as $string) { $keywords = preg_split("~[-*/+\d]+~", $string, -1, PREG_SPLIT_NO_EMPTY); print_r($keywords); }
Output for 7.1.25 - 7.1.32, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
Array ( [0] => quanity [1] => price [2] => tax ) Array ( [0] => quanity [1] => price )
preferences:
143.35 ms | 408 KiB | 5 Q