<?php
function diff($credit, $payment) {
$credit = (int) $credit;
$payment = (int) $payment;
// unknown logic, could be a simple diff
// like could be a payment process!
echo $credit - $payment;
}
// good developer
diff(2, 1);
diff(2.5, 1.3);
// good developer not strict
diff('2', '1');
// good developer doing mistakes
sum(2, \stdClass);
sum(2, -INF);
111
Fatal error: Uncaught Error: Call to undefined function sum() in /in/9WtQ5:18
Stack trace:
#0 {main}
thrown in /in/9WtQ5 on line 18
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
111
Fatal error: Call to undefined function sum() in /in/9WtQ5 on line 18
Process exited with code 255.