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

$st = echo "At index -4, the character is $st[-4].", PHP_EOL;

$st[-3] = 'o';

echo "Replacement at index -3 to o gives $st.", PHP_EOL;

?>

Which is the correct syntax of the function, Closure::from Callable, which is used to convert a callable into a closure?

var_dump((bool) -1); var_dump((bool) 1.5e5); var_dump((bool) 'false'); ?>

$x = array('x' => 'Adam', 'y' => 'Binca'); $y = array('x' => 'Avin', 'y' => 'Beth', 'z' => 'Chris'); $z = $y + $x; $x += $y; var_dump($x); ?>

Which of the following conditions must be followed by functions that are declared with void as their return type? i) Omit their return statement. ii) Use an empty return statement.

What is not a PHP type?

Output of this statement echo substr('Think Different',6);

Which PCRE regular expression will match the string

How to install pecl extensions?

What is the name of default class for all classes