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PHP Array Functions

PHP sizeof() Function

Example

<?php
Return the number of elements in an array:
$cars=array("Volvo","BMW","Toyota");;
?>

Run Examples

echo sizeof($cars)

Definition and Usage

The sizeof() function calculates the number of units in an array or the number of properties in an object. The sizeof() function is count()

Alias of the function.Note:

When the variable is not set, or the variable contains an empty array, this function will return 0. You can use the isset() variable to test whether the variable is set.

Syntaxarraysizeof(mode);
, Description
array Required. Specify the array.
mode

Optional. Specify the mode. Possible values:

  • 0 - Default. Do not count all elements in a multidimensional array.
  • 1 - Recursively count the number of elements in an array (count all elements in a multidimensional array).

Technical Details

Return Value: Return the number of elements in an array.
PHP Version: 4+

More Examples

Example 1

Recursively count the number of elements in an array:

<?php
$cars=array
  (
  "Volvo"=>array
  (
  "XC60",
  "XC90"
  ),
  "BMW"=>array
  (
  "X3",
  "X5"
  ),
  "Toyota"=>array
  (
  "Highlander"
  )
  );
echo "Regular Count: " . sizeof($cars)."<br>";
echo "Recursive Count: " . sizeof($cars,1);
?>

Run Examples

PHP Array Functions