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<?php $input = '((rats + stoats) - 800 / 2)'; $tokens = token_get_all("<?php {$input}"); $expr = ''; foreach($tokens as $token){ if(is_string($token)){ if(in_array($token, array('(', ')', '+', '-', '/', '*'), true)){ $expr .= $token; print "\n symbol: " . $expr; } continue; } list($id, $text) = $token; if(in_array($id, array(T_DNUMBER, T_LNUMBER))){ $expr .= $text; print "\n number: " . $expr; } } eval("\$result = {$expr};"); print "\nexpr = " . $expr; print "\nres = " . $result;
Output for git.master, git.master_jit, rfc.property-hooks
symbol: ( symbol: (( symbol: ((+ symbol: ((+) symbol: ((+)- number: ((+)-800 symbol: ((+)-800/ number: ((+)-800/2 symbol: ((+)-800/2) Parse error: syntax error, unexpected token ")" in /in/Edcsv(28) : eval()'d code on line 1
Process exited with code 255.

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