Question

 eval('class this {  ');

 eval('function this($l1,$l2) {
  if($l1==0) { throw new ErrorException("error"); }
  echo $l1.$l2;
  }}');

try {
 $t = new this(0,1);
}
catch(Exception $e) {
 echo $e->getMessage();
}

Why is this code not working?

Errors:

Parse error: syntax error, unexpected $end, expecting T_FUNCTION in .......(4) : eval()'d code on line 1

Parse error: syntax error, unexpected '}' in.......(9) : eval()'d code on line 4

Fatal error: Class 'this' not found in .......on line 12

Answer 1

You can’t eval() an unclosed statement like class this {. You’d have to put the entire block into one string and run the eval() once.

That said, there is probably no reason to use eval() in the first place. What are you trying to do?