W3Schools Tryit Editor

​x
 
<!DOCTYPE html><html><body>​<pre>​<?phpvar_dump(5);var_dump("John");var_dump(3.14);var_dump(true);var_dump([2, 3, 56]);var_dump(NULL);?>​</pre>​</body></html>​

int(5)
string(4) "John"
float(3.14)
bool(true)
array(3) {
  [0]=>
  int(2)
  [1]=>
  int(3)
  [2]=>
  int(56)
}
NULL