Online PHP editor | output for 2nT5M

@ 2016-08-22T17:52:29Z

<?php
header('Content-Type: text/plain');

function errorHandler($errno, $errstr, $errfile, $errline) {
	if ($errno === E_RECOVERABLE_ERROR) {
		$foo = [];
		asort($foo);
		echo $errstr . PHP_EOL;
		return true;
	}
	return false;
}
set_error_handler('errorHandler');

$key = [
	(int) 0 => 'foo'
];
$select = [
	'id' => new stdClass(),
	'foo' => 'foo',
	'bar' => 'bar'
];
$missingFields = array_diff($key, $select) !== [];
var_dump($missingFields);

Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14: Fatal error: Uncaught Error: Object of class stdClass could not be converted to string in /in/2nT5M:23 Stack trace: #0 /in/2nT5M(23): array_diff(Array, Array) #1 {main} thrown in /in/2nT5M on line 23
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33: Object of class stdClass could not be converted to string bool(false)
Output for 5.6.0 - 5.6.40: Object of class stdClass could not be converted to string bool(true)

preferences:dark modelive previewkey bindings