ຫົວຂໍ້ PHP count() function

PHP Array Functions

Example

The number of elements in the array is returned:

<?php
$cars=array("Volvo","BMW","Toyota");
echo count($cars);
?>

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Definition and Usage

The count() function returns the number of elements in the array.

Syntax

count(array,mode);
Parameter Description
array Required. Specifies the array.
mode

Optional. Specifies the mode. Possible values:

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

Description

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

For arrays, returns the number of elements, for other values, returns 1. If the parameter is a variable and the variable is not defined, then returns 0.

If mode If set to COUNT_RECURSIVE (or 1), it will recursively count the number of elements in the array.

Technical Details

ກຳລັງມາອອກຈາກວິສະວະກອນ. ກຳລັງມາອອກຈາກວິສະວະກອນ.
PHP Version: 4+
ບັນທຶກການປັບປຸງ: mode ພຽງສະເໜີພາກສ່ວນໃນ PHP 4.2.

ຕົວຢ່າງອື່ນໆ

ຕົວຢ່າງ 1

ການຄາດການຕົວເລກຂອງວິສະວະກອນ

<?php
$cars=array
  (
  "Volvo"=>array
  (
  "XC60",
  "XC90"
  ,
  "BMW"=>array
  (
  "X3",
  "X5"
  ,
  "Toyota"=>array
  (
  "Highlander"
  )
  );
echo "ການຄາດການທົດແທນ: " . count($cars)."<br>";
echo "ການຄາດການກັບຕົວເລກຂື້ນ: " . count($cars,1);
?>

ການດຳເນີນຄະນະ

PHP Array Functions