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    PHP array() Function

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    Definition and Usage

    • The array() function is used to create an array.
    • In PHP, there are three types of arrays:
      • Indexed arrays - Arrays with numeric index
      • Associative arrays - Arrays with named keys
      • Multidimensional arrays - Arrays containing one or more arrays

    Syntax

    Syntax for indexed arrays:

    array(value1, value2, value3, etc.)

    Syntax for associative arrays:

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

    Parameter Values

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

    Technical Details

    Return Value: Returns an array of the parameters
    PHP Version: 4+
    Changelog: As of PHP 5.4, it is possible to use a short array syntax, which replaces array() with [].
    E.g. $cars=["Volvo","BMW"]; instead of $cars=array("Volvo","BMW");

    Examples

    Create an indexed array named $cars:
    Example 1: Indexed Arrays
    <?php
$cars=array("Volvo","BMW","Toyota");
echo "I like " . $cars[0] . ", " . $cars[1] . " and " . $cars[2] . ".";
?>
    Example 2: Associative Arrays

    Create an associative array named $age:

    <?php
$age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43");
echo "Peter is " . $age['Peter'] . " years old.";
?>
    Example 3: Loop Through an Indexed Array

    Loop 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 4: Loop Through an Associative Array

    Loop 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 5: Two-dimensional Array

    Create a multidimensional array:

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

    PHP Fundamentals course home
    PHP Referrence: The PHP reference contains different categories of all PHP functions, keywords and constants, along with examples.

    Navigate this PHP reference guide
  • array() Function
  • array_change_key_case() Function
  • array_chunk() Function
  • array_combine() Function
  • array_count_values() Function
  • arsort() Function
  • asort() Function
  • count() Function
    •

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    PHP Quiz

    Example files created in this segment:
    Indexed Arrays Associative Arrays Loop Through an Indexed Array Loop Through an Associative Array Two-dimensional Array Change all keys in an array to lowercase Special rules for changing key case PHP Array - array_chunk() Function part 1 PHP Array - array_chunk() Function part 2 PHP array_combine() Function PHP array_count_values() Function PHP arsort() Function PHP asort() Function PHP count() Function part 1 count() Function part 2