Array in PHP

An array is a data structure that store multiple values in single variable. In PHP to create an array, array() function is used.

<?php

$mobile = array("Samsung", "Nokia", "Micromax"); //$mobile is a single variable that contain many similar types of values.

echo "I like " . $mobile[0] . ", " . $mobile[1] . " and " . $mobile[2] . ".";

?>

Output:

I like Samsung, Nokia and Micromax.

Basically array are of three types:

Indexed array:

These array can store numbers, object and strings but their index is represented by numbers. Default value of any index is 0.

<?php

$mobile = array("Samsung", "Nokia", "Micromax");

foreach($mobile as $k=>$v)

echo("$k:$v.</br>");

?>

Output:

0:Samsung.//default value is 0

1:Nokia.

2:Micromax.

Associative arrays:

The associative array are similar to index array in terms of functionality but they are different in terms of key/index.

Note: These types of array are not kept inside double quotes else it will not return any value.

<?php

$salary = array("ragini"=>"35000", "Shikha"=>"40000", "Megha"=>"45000");

echo "Shikha salary is " . $salary['Shikha'];

?>

Output:

Shikha salary is 40000

Multi-dimensional array

A multi-dimensional array consist one or more arrays. Below is an example in which 3 students marks of three subject are stored in 2-dimensional array.

<?php

         $record = array(
            "Rakesh" => array (
               "Hindi" => 52,
               "English" => 34,  
               "History" => 33

            ),

            "salman" => array (
               "Hindi" => 39,
               "English" => 35,
               "History"=> 34
            ),

            "Shikha" => array (

               "Hindi" => 37,
               "English" => 29,
               "History" => 31

            )
         );

         /* Accessing multi-dimensional array values */

         echo "Marks for Rakesh in History : " ;
         echo $record['Rakesh']['History'] . "<br />";
         echo "Marks for salman in English : ";
         echo $record['salman']['English'] . "<br />";
         echo "Marks for Shikha in Hindi : " ;
         echo $record['Shikha']['Hindi'] . "<br />";

      ?>

Output

Marks for Rakesh in History : 33

Marks for salman in English : 35

Marks for Shikha in Hindi : 37

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Array in PHP

Associative arrays:

Output

zack mathews

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