Fatal error: Cannot use isset() on the result of an expression (you can use "null !== expression" instead)

Question

if(isset($_GET['a'] or $_GET['b'])){
  echo "ok";
}else{
  echo "no";
 }

i have two var for one condition when isset $_GET['a'] or $_GET['b']
always echo ok either echo no

Syntactics

Should be isset(…) or isset(…) – Shame

Well the error message already says everything. What you probably want is (pseudo code): isset(a) || isset(b) – Schafer

@Shame Is it already bourbon time again :]? – Schafer

Answer 1

isset takes only one input not two

it should be

if(isset($_GET['a']) OR isset($_GET['b']))
{
echo 'ok';
}
else
{
echo 'nope';
}

Henke

try it there is always echo 'nope' – Syntactics

i had missed a ' inside the a index. and the reason why its not working for you is because either $_GET['a'] or $_GET['b'] is not set. are these values in the url as parameters or are they post fields on the form? – Henke