14. Consider the following script:
<?php
function myfunction($a, $b = true)
{
if($a && !$b) {
echo "Hello, World!
";
}
}
$s = array(0 => "my",
1 => "call",
2 => $function ,
3 => ,
4 => "function",
5 => $a ,
6 => $b ,
7 => a ,
8 => b ,
9 => );
$a = true;
$b = false;
/* Group A */
$name = $s[?].$s[?].$s[?].$s[?].$s[?].$s[?];
/* Group B */
$name(${$s[?]}, ${$s[?]});
?>
Each ? in the above script represents an integer index against the $s array. In order to display the Hello, World! string when executed, what must the missing integer indexes be?
Вариант ответа 1 - A) Group A: 4,3,0,4,9,9 Group B: 7,8
Вариант ответа 2 - B) Group A: 1,3,0,4,9,9 Group B: 7,6
Вариант ответа 3 - C) Group A: 1,3,2,3,0,4 Group B: 5,8
Вариант ответа 4 - D) Group A: 0,4,9,9,9,9 Group B: 7,8
Вариант ответа 5 - E) Group A: 4,3,0,4,9,9 Group B: 7,8
Комментарий: Functions can be called dynamically by appending parentheses (as well as any parameter needed) to a variable containing the name of the function to call. Thus, for Group A the appropriate index combination is 0, 4, 9, 9, 9, 9, which evaluates to the string myfunction. The parameters, on the other hand, are evaluated as variables dynamically using the ${} construct. This means the appropriate indexes for group B are 7 and 8, which evaluate to ${ a } and ${ b }—meaning the variables $a and $b respectively.