In PHP 7.1, which of the following options 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 Output will be? interface Exp { public function x();} class First implements Exp { public function x() {} } class Second {} function x(Exp $e){ echo get_class($e).'\n'; } x(new First); x(new Second); ?>

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?

Which responsible for change the current directory?