PHP array() function

In this chapter you will learn:

Description for PHP array() function
Syntax for numeric indexed arrays
Syntax for associative arrays
Example for array() function
Example - Creates an associative array named $age
Example - loop through PHP array
Example - loop associative array
Example - multidimensional array

Description

In PHP, there are two types of arrays:

Type	Meaning
Indexed arrays	Arrays with numeric index values
Associative arrays	Arrays with named keys(key value pair)

The array() function is used to create an array of above types.

Syntax for numeric indexed arrays

Syntax to use array() function to create numeric indexed arrays is as follows.

array(value1,value2,value3,etc.);

Syntax for associative arrays

Syntax to use array() function to create associative arrays is as follows.

array(key=>value,key=>value,key=>value,etc.);

Parameter	Description
key	the key (numeric or string)
value	the value

Example 1

Create an indexed array named $names, assign four elements to it, and then print a text containing the array values.


<?php
$names = array("Volvo","BMW","Toyota","PHP from java2s.com");
echo $names[0] . ", " . $names[1] . " and " . $names[3] . ".";
?>

The code above generates the following result.

Example 2

Creates an associative array named $age.


<?php
$age=array("PHP"=>"5","Python"=>"7","Java"=>"4");
echo "PHP is " . $age['PHP'] . " years old.";
?>

The code above generates the following result.

Example 3

Loop through and print all the values of an indexed array


<?php//from   ja  va 2  s .  c  om
$cars=array("A","B","C");
$arrlength=count($cars);

for($x=0;$x<$arrlength;$x++){
  echo $cars[$x];
  echo "\n";
}
?>

The code above generates the following result.

Example 4

Loop through and print all the values of an associative array.


<?php/*  ja  va 2  s.com*/
$age=array("PHP"=>"5","Python"=>"7","Java"=>"3");

foreach($age as $x=>$x_value){
  echo "Key=" . $x . ", Value=" . $x_value;
  echo "\n";
}
?>

The code above generates the following result.

Example 5

Create a multidimensional array.


<?php/*from   java  2s  .  c o m*/
$cars=array(
  array("Name"=>"PHP","Price"=>100),
  array("Name"=>"Python","Price"=>100),
  array("Name"=>"Java","Price"=>10)
);
var_dump($cars);
?>