Zend Preparation | PHP Quiz (Learning Mode)

Arrays Learning Mode

Qusetions Index 4/40

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Consider the following code:

<?php
$array = array("a1"=>'x',"a2"=>'e',"a3"=>'z');
asort( $array );
foreach ( $array as $keys => $values )
{
    print "$keys = $values";
}
?>

What will be the output?

a2 = e a1 = x a3 = z

a1 = e a2 = x a3 = z

0 = e 1 =x 2 = z

The script will throw an error message.

Explanation: Answer option A is correct.

The asort() function accepts an associative array and sorts its values either alphabetically if any strings are present or numerically if all elements are numbers. However, the asort() function preserves the array keys. Consider the following example:

    <?php
     $array = array("a1"=>'x',"a2"=>'e',"a3"=>'z');
     asort( $array );
     foreach ( $array as $keys => $values )
     {
     print "$keys = $values<br />";
     }
    ?>

Output:

a2 = e
a1 = x
a3 = z

In the output, the array keys are preserved and array elements are sorted in the same way as in the sort() function.

Reference: https://www.php.net/manual/en/function.asort.php