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<?php $input = '$x=100; ((800 + 20) - 800 / 2)'; $tokens = token_get_all("<?php {$input}"); $expr = ''; foreach($tokens as $token){ if(is_string($token)){ if(in_array($token, array('(', ')', '+', '-', '/', '*','if','IF' , '{' ,'}' , ';' ,'$' , '='), true)) $expr .= $token; continue; } list($id, $text) = $token; if(in_array($id, array(T_DNUMBER, T_LNUMBER, T_BOOLEAN_AND, T_BOOLEAN_OR, T_DEC, T_DIV_EQUAL,T_DOUBLE_CAST,T_ELSE,T_ELSEIF, T_ENDIF,T_IF,T_INC, T_IS_EQUAL, T_IS_GREATER_OR_EQUAL,T_IS_IDENTICAL,T_IS_NOT_EQUAL, T_IS_NOT_IDENTICAL, T_IS_SMALLER_OR_EQUAL, T_LOGICAL_AND , T_LOGICAL_OR ,T_MINUS_EQUAL,T_MOD_EQUAL, T_MUL_EQUAL, T_OR_EQUAL, T_PLUS_EQUAL, T_POW, T_POW_EQUAL , T_STRING_VARNAME,T_VARIABLE , T_XOR_EQUAL ))) { $expr .= $text; echo text; } } eval("\$result = {$expr};"); 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 - 8.3.4, 8.3.6
Fatal error: Uncaught Error: Undefined constant "text" in /in/cYeNM:24 Stack trace: #0 {main} thrown in /in/cYeNM on line 24
Process exited with code 255.
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 Fatal error: Uncaught Error: Undefined constant "text" in /in/cYeNM:24 Stack trace: #0 {main} thrown in /in/cYeNM on line 24
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant text - assumed 'text' (this will throw an Error in a future version of PHP) in /in/cYeNM on line 24 text Warning: Use of undefined constant text - assumed 'text' (this will throw an Error in a future version of PHP) in /in/cYeNM on line 24 text Warning: Use of undefined constant text - assumed 'text' (this will throw an Error in a future version of PHP) in /in/cYeNM on line 24 text Warning: Use of undefined constant text - assumed 'text' (this will throw an Error in a future version of PHP) in /in/cYeNM on line 24 text Warning: Use of undefined constant text - assumed 'text' (this will throw an Error in a future version of PHP) in /in/cYeNM on line 24 text Warning: Use of undefined constant text - assumed 'text' (this will throw an Error in a future version of PHP) in /in/cYeNM on line 24 text expr = $x=100;((800+20)-800/2) res = 100
Output for 7.1.0 - 7.1.20
Notice: Use of undefined constant text - assumed 'text' in /in/cYeNM on line 24 text Notice: Use of undefined constant text - assumed 'text' in /in/cYeNM on line 24 text Notice: Use of undefined constant text - assumed 'text' in /in/cYeNM on line 24 text Notice: Use of undefined constant text - assumed 'text' in /in/cYeNM on line 24 text Notice: Use of undefined constant text - assumed 'text' in /in/cYeNM on line 24 text Notice: Use of undefined constant text - assumed 'text' in /in/cYeNM on line 24 text expr = $x=100;((800+20)-800/2) res = 100
preferences:
149.24 ms | 402 KiB | 159 Q