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php count() function

Chinese translationRecent Updates：2018-04-18 16:04:31

UK[kaʊnt] US[kaʊnt]

n.Total number; count; charges; argument

v. Count; calculate the total; count...; important

Third person singular: counts Plural: counts Present participle: counting Past tense: counted Past participle: counted

php count() function Video explanation

php count() function syntax

Function:Return the number of elements in the array

Syntax:count(array,mode);

## Parameters:

Parameter Descriptionarray Required. Specifies an array. modeOptional. 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).

Description: For an array, return the number of its elements, for other values, return 1. If the argument is a variable and the variable is not defined, 0 is returned. If mode is set to COUNT_RECURSIVE (or 1), the number of array elements in a multidimensional array is recursively counted.

php count() function example

<?php
$a = array("class" => "php中文网","name" => "西门","job" => "讲师");
print_r(count($a));
?>

Click the "Run instance" button to view the online instance

Output:

<?php
$cars=array
  (
  "Volvo"=>array
  (
  "XC60",
  "XC90"
  ),
  "BMW"=>array
  (
  "X3",
  "X5"
  ),
  "Toyota"=>array
  (
  "Highlander"
  )
  );

echo "常规计数：" . count($cars)."<br>";
echo "递归计数：" . count($cars,1);
?>

Click the "Run Instance" button to view the online instance

Output:

常规计数：3
递归计数：8

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