Online PHP editor | output for rVOuX

<?php $input = ' $c=10; $x=100; ((800 + 20) - 800 / 2)'; $tokens = token_get_all("<?php {$input}"); $expr = ''; foreach($tokens as $token){ /* print_r($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, 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 .= $text; } } //eval("\$result = {$expr};"); print "\nexpr = " . $expr;