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

for ($a = 2, $b = 1; $a <= 6; $b += $a, print $a, $a++);

?>

Find the output. $a = $b = &$a; $b = 'I met $b'; echo $b; echo $a; ?>

Find the output. namespace A\B\C; const E_ERROR = 32; function strlen($s) { return \strlen($s) - 5; } echo E_ERROR, '\n'; echo INI_ALL, '\n'; echo strlen( if (is_array('abc')) { echo 'is an example.\n'; } else { echo 'is a test.\n'; } ?>

the string session_create_id ([ string $prefix ]) function is used for creating a new session id. Which of the following characters are allowed by the parameter prefix?

Output of the following code? $example = array(2, 4, 6, 8, 10); foreach ($example as $x => $value){ unset($example[$x]); } print_r($example); $example[] = 12; print_r($example); $example = array_values($example); $example[] = 14; print_r($example); ?>

interface ExampleInterface { } class ExampleClass implements Exampleinterface { } $x = new ExampleClass; $y = new ExampleClass; $z = $p = 'NotExampleClass'; var_dump($x instanceof $y); var_dump($x instanceof $z); var_dump($x instanceof $p); ?>

Which functions get a list of response headers sent (or ready to send)?

Which functions set options in curl script?

How to check if a directory exists?

____ will walk through the entire array regardless of pointer position.

Difference between idate and date function?