<?php
$input = '$x=100; ((800 + 20) - 800 / 2)';
$tokens = token_get_all("<?php {$input}");
$expr = '';
foreach($tokens as $token){
if(in_array($token, 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 )))
echo $token;
if(is_string($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)))
$expr .= $text;
}
eval("\$result = {$expr};");
print "\nexpr = " . $expr;
print "\nres = " . $result;
preferences:
38.17 ms | 402 KiB | 5 Q