Php Array Function || How To declare Php Array

PHP Array Function:

the php array is stored multiple values in single variable.

3 types of array.

Advantage of PHP Array Function:

Less Code: We don't need to define multiple variables.
Easy to traverse: By the help of single loop, we can traverse all the elements of an array.
Sorting: We can sort the elements of array.

Types Of PHP Array

There are 3 types of array in PHP.

Indexed Array
Associative Array
Multidimensional Array

Indexed Array

PHP index is represented by number which starts from 0. We can store number, string and object in the PHP array. All PHP array elements are assigned to an index number by default.
There are two ways to define indexed array:
1st way:

$season=array("summer","winter","spring","autumn");

2nd way:

$season[0]="summer";
$season[1]="winter";
$season[2]="spring";
$season[3]="autumn";

Example

File: array1.php

<?php
$season=array("summer","winter","spring","autumn");
echo "Season are: $season[0], $season[1], $season[2] and $season[3]";
?>

Output:

Season are: summer, winter, spring and autumn

File: array2.php

<?php
$season[0]="summer";
$season[1]="winter";
$season[2]="spring";
$season[3]="autumn";
echo "Season are: $season[0], $season[1], $season[2] and $season[3]";
?>

Output:

Season are: summer, winter, spring and autumn

PHP Associative Array

We can associate name with each array elements in PHP using => symbol.
There are two ways to define associative array:
1st way:

$salary=array("Sonoo"=>"350000","John"=>"450000","Kartik"=>"200000");

2nd way:

$salary["Sonoo"]="350000";
$salary["John"]="450000";
$salary["Kartik"]="200000";

Example

File: arrayassociative1.php

<?php
$salary=array("Sonoo"=>"350000","John"=>"450000","Kartik"=>"200000");
echo "Sonoo salary: ".$salary["Sonoo"]." ";
echo "John salary: ".$salary["John"]." ";
echo "Kartik salary: ".$salary["Kartik"]." ";
?>

Output:

Sonoo salary: 350000
John salary: 450000
Kartik salary: 200000

File: arrayassociative.php

<?php
$salary["Sonoo"]="350000";
$salary["John"]="450000";
$salary["Kartik"]="200000";
echo "Sonoo salary: ".$salary["Sonoo"]." ";
echo "John salary: ".$salary["John"]." ";
echo "Kartik salary: ".$salary["Kartik"]." ";
?>

Output:

Sonoo salary: 350000
John salary: 450000
Kartik salary: 200000


Multidimensional Array

PHP multidimensional array is also known as array of arrays. It allows you to store tabular data in an array. PHP multidimensional array can be represented in the form of matrix which is represented by row * column.

Declaration







$emp = array  
  (  
  array(1,"sonoo",400000),  
  array(2,"john",500000),  
  array(3,"rahul",300000)  
  );  




PHP Multidimensional Array Example

Let's see a simple example of PHP multidimensional array to display following tabular data. In this example, we are displaying 3 rows and 3 columns.

Id Name Salary
1 sonoo 400000
2 john 500000
3 rahul 300000