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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 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
Array ( [0] => quanity [1] => price [2] => tax ) Array ( [0] => quanity [1] => price )
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Array ( [0] => quanity [1] => price [2] => tax ) Array ( [0] => quanity [1] => price )

preferences:
130.31 ms | 402 KiB | 179 Q