What will be the output of the following PHP 7.1 code?

$o = (object) array( var_dump(isset($o-> {'5'}));

var_dump(key($o));

?>

Which can be used as a default value for parameters that are declared as iterable?

Which is NOT correct about PHP 7.1 variables?

In the following PHP 7.1 code snippet, commenting or removing which code line will result in the successful compilation of the code? 1. 2. namespace X\Y\Z; 3. class Exception extends \Exception {} 4. $x = new Exception() 5. $y = new \Exception('hi'); 6. $z = new ArrayObject; 7. ?>

What will be the output? $example = true; example_y(); if ($example){ function example_x() { echo 'PHP\n'; } } if ($example)example_x(); function example_y() { echo 'Example\n'; } ?>

What will be the output? declare(ticks=1); function t_handler() { echo 'Example function\n'; } register_tick_function( $x = 1; if ($x > 0) { $x += 2; print($x); } ?>

What is the name of the function to check that the variable type is an object?

Which of the following is not related to file

Which array function checks if the specified key exists in the array?

What function in PHP allows you to find the position of the first occurrence of a substring?

How can you delete a file using a php function?