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PHP Basic

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Text lesson

array()

Example

Create an indexed array named $cars, assign three elements to it, and then print a text containing the array values:

<?php
$cars=array(“Volvo”,“BMW”,“Toyota”);
echo “I like “ . $cars[0] . “, “ . $cars[1] . ” and “ . $cars[2] . “.”;
?>

Definition and Usage

The array() function is used to create an array.

In PHP, there are three types of arrays:

  1. Indexed arrays – Arrays with numeric indices
  2. Associative arrays – Arrays with named keys
  3. Multidimensional arrays – Arrays containing one or more arrays

Syntax

Syntax for creating indexed arrays:

array(value1, value2, value3, etc.)

Syntax for creating associative arrays:

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

Parameter Values

Parameter

Description

key

Specifies the key (which can be numeric or a string)

value

Defines the value

Technical Details

 

Return Value:

Returns an array of the arguments

PHP Version:

4+

Changelog:

Starting with PHP 5.4, a short array syntax is available, allowing the use of [] instead of array(). For example, $cars = [“Volvo”, “BMW”]; can be used instead of $cars = array(“Volvo”, “BMW”);.

More Examples

Example

Create an associative array called $age:

<?php
$age=array(“Peter”=>“35”,“Ben”=>“37”,“Joe”=>“43”);
echo “Peter is “ . $age[‘Peter’] . ” years old.”;
?>

Example

Iterate through and print all the values of an indexed array:

<?php
$cars=array(“Volvo”,“BMW”,“Toyota”);
$arrlength=count($cars);

for($x=0;$x<$arrlength;$x++)
  {
  echo $cars[$x];
  echo “<br>”;
  }
?>

Example

Iterate through and print all the values of an associative array:

<?php
$age=array(“Peter”=>“35”,“Ben”=>“37”,“Joe”=>“43”);

foreach($age as $x=>$x_value)
  {
  echo “Key=” . $x . “, Value=” . $x_value;
  echo “<br>”;
  }
?>

Example

Define a multidimensional array:

<?php
// A two-dimensional array:
$cars=array
  (
  array(“Volvo”,100,96),
  array(“BMW”,60,59),
  array(“Toyota”,110,100)
  );
?>