Divide by Zero warning is not caught in a PHP try/catch block [duplicate]

This question already has answers here: PHP, How to catch a division by zero? (15 answers) Closed 1 year ago.

I have this PHP code. Whenever y becomes zero, it shows a warning instead of catching the exception. Is there anything wrong with my code?

try
{
    return($x % $y); 
    throw new Exception("Divide error..");
}
catch(Exception $e){
    echo "Exception:".$e->getMessage();
}

I got this warning:

开发者_如何学编程Warning: Division by zero in file.php

The catch block is not run. What am I doing wrong?

---

A warning is not an exception. Warnings cannot be caught with exception handling techniques. Your own exception is never thrown since you always return before.

You can suppress warnings using the @ operator like @($x % $y), but what you should really do is make sure $y does not become 0.

I.e.:

if (!$y) {
    return 0; // or null, or do something else
} else {
    return $x % $y;
}

---

Yes, you are executing the return before the throw. Hence the throw is never executed and no exception is thrown nor caught.

---

this is how it should be done

$value;

try
{
    $value = $x%$y; 
}
catch(Exception $e){
  throw new Exception("Divide error..");
  echo "Exception:".$e->getMessage();
}

return $value

But since you are getting a warning if you want to hide the error and handle it discretely You can use the @ sign

$value = @$x%$y;

now you can test the value and see if it has the value it has