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<?php function get_variables($code) { // get all the tokens $tokens = token_get_all("<?php $code ?>"); // filter out non-variables $tokens = array_filter($tokens, function ($t) { return $t[0] == T_VARIABLE; }); // return the variable names return array_column($tokens, 1); } print_r(get_variables('$isTrue ? $a : $b')); print_r(get_variables('$a=$b * ($c + 1)'));
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 - 8.3.25, 8.4.1 - 8.4.12
Array ( [0] => $isTrue [1] => $a [2] => $b ) Array ( [0] => $a [1] => $b [2] => $c )
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] => $isTrue [1] => $a [2] => $b ) Array ( [0] => $a [1] => $b [2] => $c )
preferences:
130.99 ms | 408 KiB | 5 Q