We have two variable definitions:

1. 023
2. x23

Choose the correct options:

Which is correct about the following snippet? function example() { foreach (range(5, 7) as $a){yield; } } var_dump(iterator_to_array(example())); ?>

What is the correct output? interface exp1 { const c = } echo exp1 ::c; class exp2 implements exp1 { const c = 'Second Example'; } echo exp2::c; ?>

Which is correct? class example { function do_example() { echo 'Testing example code.'; } } $b = new example; $b->do_example(); ?>

Which is used for checking the installed version of PHP 7.1 ?

Which is correct about the following snippet? const C = 2; class example { const D = C * 2; const E = C + self::D; const F = } echo example::D, PHP_EOL; echo example::F; ?>

Output of the next code? : $someString = 1.2e3; var_dump(strlen($someString));

Key casts in arrays. What is the resulting array $a = array( 1 => 'John', '1' => 'Doe', 1.5 => 'Jane', true => 'Smith', );

$a = 'Hello'; echo (int)!!$a;

What is the function to report errors from mysqli functions or queries?

Output of the following code? echo new stdClass == new stdClass, '-', new stdClass !== new stdClass;