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<?php $str = "50+16-0*387/2+49"; $digits = []; $symbols = []; preg_match_all("/(\d+)|(\D+)/", $str, $matches, PREG_SET_ORDER); foreach ($matches as $match) { if ($match[1] !== '') { $digits[] = $match[1]; } else { $symbols[] = $match[2]; } } var_export($digits); echo "\n---\n"; var_export($symbols);
Output for 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 - 8.3.4, 8.3.6 - 8.3.27, 8.4.1 - 8.4.14
array ( 0 => '50', 1 => '16', 2 => '0', 3 => '387', 4 => '2', 5 => '49', ) --- array ( 0 => '+', 1 => '-', 2 => '*', 3 => '/', 4 => '+', )
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 => '50', 1 => '16', 2 => '0', 3 => '387', 4 => '2', 5 => '49', ) --- array ( 0 => '+', 1 => '-', 2 => '*', 3 => '/', 4 => '+', )

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92.09 ms | 408 KiB | 5 Q