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<?php $input = '((800 + 20) - 800 / 2) `whoami`'; $tokens = token_get_all("<?php {$input}"); $expr = ''; foreach($tokens as $token){ if(is_string($token)){ if(in_array($token, array('(', ')', '+', '-', '/', '*'), true)) $expr .= $token; continue; } list($id, $text) = $token; if(in_array($id, array(T_DNUMBER, T_LNUMBER))) $expr .= $text; } $result = eval("return ({$input});"); print "\nexpr = " . $expr; print "\nres = " . $result;
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Parse error: syntax error, unexpected token "`" in /in/eEbF9(25) : eval()'d code on line 1
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Parse error: syntax error, unexpected '`' in /in/eEbF9(25) : eval()'d code on line 1
Process exited with code 255.
Output for 5.4.11 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected '`' in /in/eEbF9(25) : eval()'d code on line 1 expr = ((800+20)-800/2) res =
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.10
Parse error: syntax error, unexpected '`' in /in/eEbF9(25) : eval()'d code on line 1 expr = ((800+20)-800/2) res =
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '`' in /in/eEbF9(25) : eval()'d code on line 1 expr = ((800+20)-800/2) res =
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/eEbF9(25) : eval()'d code on line 1 expr = ((800+20)-800/2) res =
Process exited with code 255.
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