Zend Preparation | PHP Quiz (Learning Mode)

Arrays Learning Mode

Qusetions Index 1/40

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Consider the following PHP script:

<?php
$a = array(
         1 => 'php',
          'Hypertext',
          'Preprocessor',
           'widely used' => 
            array(
                           'general' => 'purpose',
                            'scripting' => 'language',
                            'that' => 'was',
                            'originally' => 
                             array(
                                            5 => 'designed',
                                            9 => 'for',
                                            'Web development',
                                             4 => 'purpose',
                                     )
                    )
            );

//write code here  

?>

What should you write here to print the value 'Web development'?

print $a[widely used][originally][3];

print $a[2][3][3];

print $a['widely used']['originally'][0];

print $a['widely used']['originally'][10];

Explanation: For printing the value, you will have to print the

$a['widely used']['originally'][10]

In the associative array, the array index increments from the last integer index key. The index key of the value 'Web development' will be 10 since the last integer index key is 9. An associative array is an abstract data type composed of a collection of unique keys and a collection of values, where each key is associated with one value (or set of values). The operation of finding the value associated with a key is called a lookup or indexing, and this is the most important operation supported by an associative array. The relationship between a key and its value is sometimes called a mapping or binding. The following code creates an associative array with product names as keys and prices as values.

$prices = array( 'Tires'=>100, 'Oil'=>10, 'Spark Plugs'=>4 );

Note: Always use quotes around a string literal array index. For example, $foo['bar'] is correct, while $foo[bar] is not.

Reference: http://php.net/manual/en/language.types.array.php