The Wayback Machine - https://web.archive.org/web/20250114132213/https://www.geeksforgeeks.org/php-count-function/

PHP count() Function

Last Updated : 20 Jun, 2023

This inbuilt function of PHP is used to count the current elements in the array. The function might return 0 for the variable that has been set to an empty array. Also for the variable which is not set the function returns 0.

Syntax:

count($array, mode)

Parameters: The function generally takes one parameter that is the array for which the elements is needed to be counted. But in addition, the function can take a parameter mode which tells the function to count element in which normal or recursive mode.

$array (mandatory) : Refers to the array, whose elements are needed to be counted.
mode (optional) : This is used to set the mode of the function. The parameter can take two possible values, either 0 or 1. 1 generally indicates to count the values of the array recursively. This helps in counting the multidimensional array. The default value is 0 or False.

Return Values: The function returns the number of elements in an array. Below programs will help in understanding the working of count() function.

Program 1: Counting normally, that is passing mode as 0 or not passing the parameter mode.

PHP

<?php 
  
// PHP program to illustrate working of count() 
$array = array("Aakash", "Ravi", "Prashant", "49", "50"); 
  
print_r(count($array)); 
  
?> 

Output:

Program 2: Counting recursively or passing mode as 1.

PHP

<?php 
  
// PHP program to illustrate working of count() 
$array = array('names' => array('Aakash', 'Ravi', 'Prashant'), 
               'rollno' => array('5', '10', '15')); 
  
// recursive count - mode as 1 
echo("Recursive count: ".count($array,1)."\n"); 
  
// normal count - mode as 0 
echo("Normal count: ".count($array,0)."\n"); 
  
?> 

Output:

Recursive count: 8
Normal count: 2

Reference: http://php.net/manual/en/function.count.php

Become a Full-Stack Developer and also get 90% fee refund on completing 90% course in 90 days! Take the Three 90 Challenge today.

After successfully processing refunds worth over INR 5 Cr, GeeksforGeeks is back with the Three 90 challenge and this is your chance to upskill and get 90% refund. What more motivation do you need? Start the challenge right away!

PHP current() Function

C

Chinmoy Lenka

News

Improve

Article Tags :

Similar Reads

PHP array_chunk() Function

The array_chunk() function is an inbuilt function in PHP which is used to split an array into parts or chunks of given size depending upon the parameters passed to the function. The last chunk may contain fewer elements than the desired size of the chunk. Syntaxarray array_chunk( $array, $size, $pre

PHP array_combine() Function

The array_combine() function is an inbuilt function in PHP which is used to combine two arrays and create a new array by using one array for keys and another array for values. That is all elements of one array will be the keys of new array and all elements of the second array will be the values of t

PHP array_count_values() Function

The array_count_values() is an inbuilt function in PHP which is used to count all the values inside an array. In other words we can say that array_count_values() function is used to calculate the frequency of all of the elements of an array. Syntax: array array_count_values( $array ) Parameters: Thi

PHP array_diff_assoc() Function

This inbuilt function of PHP is used to get the difference between one or more arrays. This function compares both the keys and values between one or more arrays and returns the difference between them. So, the function generally compares two arrays according to there keys and values and returns the

PHP array_diff_key() Function

This inbuilt function of PHP is used to get the difference between one or more arrays. This function compares the keys between one or more arrays and returns the difference between them. So, the function generally compares two arrays according to their keys and returns the elements that are present

PHP array_diff_uassoc() Function

The array_diff_uassoc() function is a built-in function in PHP and is used to get the difference between one or more arrays using an user-defined function to compare the keys. This function compares both the keys and values between one or more arrays to and returns the elements from the first array

PHP array_diff_ukey() Function

The array_diff_ukey() function is an inbuilt function in PHP. It is used to compares the key two or more arrays using a user-defined function, and return an array, which is array1 and its not present any others array2, array3 or more... Syntax: array_diff_ukey($array1, $array2, $array3..., arr_diffu

PHP array_diff() function

The array_diff() is an inbuilt function in PHP ans is used to calculate the difference between two or more arrays. This function computes difference according to the values of the elements, between one or more array and return differences in the form of a new array. This function basically returns a

PHP array_fill_keys() Function

The array_fill_keys() function is a builtin function in PHP and is used to create a new array filled with the given keys and value provided as an array to the function. Syntax: array array_fill_keys ( $keys, $value ) Parameters: This function accepts two parameters, keys and their values to be prese

PHP array_fill() function

The array_fill() is an inbuilt-function in PHP and is used to fill an array with values. This function basically creates an user-defined array with a given pre-filled value. Syntax: array_fill($start_index, $number_elements, $values) Parameter: The array_fill() function takes three parameters and ar

PHP array_filter() Function

This built-in function in PHP is used to filter the elements of an array using a user-defined function which is also called a callback function. The array_filter() function iterates over each value in the array, passing them to the user-defined function or the callback function. If the callback func

PHP array_flip() Function

This built-in function of PHP is used to exchange elements within an array, i.e., exchange all keys with their associated values in an array and vice-versa. We must remember that the values of the array need to be valid keys, i.e. they need to be either integer or string. A warning will be thrown if

PHP array_intersect_assoc() Function

The array_intersect_assoc() is a builtin function in PHP and is used to compute the intersection of two or more arrays. This function is similar to the function array_intersect() which is discussed in the article PHP | array_intersect() function. The function is also used to compare the values of tw

PHP array_intersect_key() Function

This builtin function of PHP is used to compute the intersection of two or more arrays. The function is different from array_intersect() and array_intersect_assoc() in a way that it uses the keys for the comparison and returns the matching key elements. The function prints only those elements of the

PHP array_intersect_uassoc() Function

The array_intersect_uassoc() function is an inbuilt function in PHP. It is used to compare key and values of two or more arrays by using a user-defined comparison function and return the matches.The comparison function returns an integer equal to, greater than, or less than zero. If the first argume

PHP array_intersect() Function

This builtin function of PHP is used to compute the intersection of two or more arrays. The function is used to compare the values of two or more arrays and returns the matches. The function prints only those elements of the first array that are present in all other arrays. Syntax: array array_inter

PHP array_key_exists() Function

The array_key_exists() function in PHP is a built-in function that checks whether a specified key exists in an array. This function is commonly used when working with associative arrays, where keys are explicitly defined, and we need to confirm the presence of a particular key to prevent errors or u

PHP array_keys() Function

The array_keys() is a built-in function in PHP and is used to return either all the keys of and array or the subset of the keys. Syntax: array array_keys($input_array, $search_value, $strict) Parameters: The function takes three parameters out of which one is mandatory and other two are optional. $i

PHP array_merge_recursive() Function

The array_merge_recursive() is an inbuilt function in PHP and is used to merge two or more arrays into a single array recursively. This function is used to merge the elements or values of two or more arrays together into a single array. The merging occurs in such a manner that the values of one arra

PHP array_multisort() Function

The array_multisort() is an inbuilt function in PHP which is used to sort multiple arrays at once or a multi-dimensional array with each individual dimension. With this function, one should remember that string keys will be maintained, but numeric keys will be re-indexed, starting at 0 and increases

PHP array_pad() Function

The array_pad() is a builtin function in PHP and is used to pad a value fixed number of time onto an array. This function inserts an element specified number of times into an array either at front or back. Syntax: array array_pad($input_array, $input_size, $values) Parameters: This function accepts

PHP array_pop() Function

This inbuilt function of PHP is used to delete or pop out and return the last element from an array passed to it as parameter. It reduces the size of the array by one since the last element is removed from the array. Syntax: array_pop($array) Parameters: The function takes only one parameter $array,

PHP array_product() Function

There are some point of time when we need to calculate the product of all elements in an array. The most basic way to do this is to iterate over all elements and calculate the product but PHP serves us with a builtin function to do this. The array_product() is a built-in function in PHP and is used

PHP array_push() Function

This inbuilt function of PHP is used to push new elements into an array. We can push one or more than one element into the array and these elements gets inserted to the end of the array and because of the pushed elements into the array, the length of the array also gets incremented by the number of

PHP array_rand() Function

This inbuilt function of PHP is used to fetch a random number of elements from an array. The element is a key and can return one or more than one key. On a practical basis, this is not that useful because the function uses pseudo-random number generator that is not suitable for cryptographic purpose

PHP array_reduce() Function

This inbuilt function of PHP is used to reduce the elements of an array into a single value that can be of float, integer or string value. The function uses a user-defined callback function to reduce the input array. Syntax: array_reduce($array, own_function, $initial) Parameters: The function takes

PHP array_replace_recursive() Function

The array_replace_recursive() is an inbuilt function in PHP that replaces the values of the first array with the values from following arrays recursively. It performs the replacement based on the below rules: If a key from the first array exists in the second array, then the value corresponding to t

PHP array_replace() Function

The array_replace() function is a builtin function in PHP and it takes a list of arrays separated by commas (,) as parameters and replaces all those values of the first array that have same keys in the other arrays. The replacement is done according to the following rules: If a key in the first arra

PHP array_reverse() Function

This inbuilt function of PHP is used to reverse the elements of an array including the nested arrays. Also, we have an option of preserving the key elements according to the user's choice. This function accepts an array as a parameter and returns the array with elements in reversed order. Syntax: ar

PHP array_search() Function

The PHP array_search() function searches an array for a specific value and returns the first corresponding key if found. It performs a loose or strict search based on parameters and returns false if the value is not present in the array. Syntaxarray_search($value, $array, strict_parameter)Parameters

PHP array_shift() Function

This inbuilt function of PHP removes the first element from an array and returns the value of the removed element. After the removal of the first element, the key of the remaining elements is modified and again re-numbered from the start, only if the keys are numerical. In other words, this function

PHP array_slice() Function

The array_slice() is an inbuilt function of PHP and is used to fetch a part of an array by slicing through it, according to the users choice.Syntax: array_slice($array, $start_point, $slicing_range, preserve) Parameters: This function can take four parameters and are described below: $array (mandato

PHP array_splice() Function

This inbuilt function of PHP is an advanced and extended version of array_slice() function, where we not only can remove elements from an array but can also add other elements to the array. The function generally replaces the existing element with elements from other arrays and returns an array of r

PHP array_sum() Function

The array_sum() function in PHP is used to calculate the sum of values in an array. It works with both indexed and associative arrays and can handle arrays containing both integers and floats. If the array is empty, it returns 0. number array_sum ( $array )Syntaxnumber array_sum(array $array)Paramet

PHP array_udiff_assoc() Function

The array_udiff_assoc() is an inbuilt function in PHP and used for distinguishing between two or more arrays. The function computes the difference arrays from two or more arrays by use of user-defined function with additional key and returns differences. It returns all the entries that are present i

PHP array_udiff() Function

The array_udiff() is an inbuilt function in PHP and used for distinguishing between two or more array. The function compares the different values of two or more arrays by the use of user-defined function data comparison and returns the differences. Actually, the function returns all the entries that

PHP array_uintersect_assoc() Function

The array_uintersect_assoc() function is an inbuilt function in PHP used to compute the intersection of the array of keys for different values of two or more arrays. The initial array or first array compare to all others array by the callback function or user-defined function and returns the matches

PHP array_uintersect_uassoc() Function

The array_uintersect_uassoc() function is an inbuilt function in PHP which is used to computes the intersection of two arrays. There is the role of a callback function which helps in comparing and computing the indexes values, It compares the keys. It also compares the values inside the two or more

PHP array_uintersect() Function

The array_uintersect() is an inbuilt function in PHP and is used to compute the intersection of two or more arrays depending on the values. The first array values are compared with all the other arrays with the help of an user-defined function and the matches are returned. Syntax: array_uintersect($

PHP array_unique() Function

The PHP array_unique() function removes duplicate values from an array, preserving the first occurrence of each value and reindexing the array with keys preserved. It's useful for filtering out redundant data and ensuring a collection of unique elements within an array. Syntaxarray array_unique($arr

PHP array_unshift() Function

This inbuilt function of PHP is used to add one or more elements into an array and these elements are added to at the beginning of the array. All the elements that we add into the array are inserted in the same order, as they have been passed. They are numerically indexed starting from the 0th posit

PHP array_values() Function

The array_values() is an inbuilt PHP function is used to get an array of values from another array that may contain key-value pairs or just values. The function creates another array where it stores all the values and by default assigns numerical keys to the values. Syntax:array array_values($array)

PHP array_walk_recursive() Function

The array_walk_recursive() function is an inbuilt function in PHP. The array_walk_recursive() function walks through the entire array regardless of pointer position and applies a callback function or user-defined function to every element of the array recursively. The array element’s keys and values

PHP array_walk() Function

The array_walk() function is an inbuilt function in PHP. The array_walk() function walks through the entire array regardless of pointer position and applies a callback function or user-defined function to every element of the array. The array element's keys and values are parameters in the callback

PHP array() Function

The array() function is an inbuilt function in PHP which is used to create an array. There are three types of array in PHP: Indexed array: The array which contains numeric index. Syntax: array( val1, val2, val3, ... ) Associative array: The array which contains name as keys. Syntax: array( key=>v

PHP arsort() Function

The arsort() in PHP is used to sort an array according to values. It sorts in a way that relation between indices and values is maintained. By default it sorts in descending order of values. Syntax: bool arsort( $array, $sorting_type ) Parameters: This function accepts two parameters as mentioned ab

PHP compact() Function

The compact() function is an inbuilt function in PHP and it is used to create an array using variables. This function is the opposite of the extract() function. It creates an associative array whose keys are variable names and their corresponding values are array values. Syntax: array compact("varia

PHP count() Function

This inbuilt function of PHP is used to count the current elements in the array. The function might return 0 for the variable that has been set to an empty array. Also for the variable which is not set the function returns 0. Syntax: count($array, mode) Parameters: The function generally takes one p

PHP current() Function

The current() function is an inbuilt function in PHP. It is used to return the value of the element in an array which the internal pointer is currently pointing to.The current() function does not increment or decrement the internal pointer after returning the value.In PHP, all arrays have an interna

PHP end() Function

The end() function is an inbuilt function in PHP and is used to find the last element of the given array. The end() function changes the internal pointer of an array to point to the last element and returns the value of the last element. Syntax:end($array)Parameters:This function accepts a single pa

PHP extract() Function

The extract() Function is an inbuilt function in PHP. The extract() function does array to variable conversion. That is it converts array keys into variable names and array values into variable value. In other words, we can say that the extract() function imports variables from an array to the symbo

PHP in_array() Function

The in_array() function is an inbuilt function in PHP that is used to check whether a given value exists in an array or not. It returns TRUE if the given value is found in the given array, and FALSE otherwise. Syntax:bool in_array( $val, $array_name, $mode )Parameters:$val: value that needs to be se

PHP key() Function

The key() function is an inbuilt function in PHP which is used to return the index of the element of a given array to which the internal pointer is currently pointing. The current element may be starting or next element which depends on the cursor position. By default cursor position is at zero inde

PHP krsort() Function

The krsort() function is an inbuilt function in PHP which is used to sort an array by key in reverse order according to its index values. It sorts in a way that relation between indices and values is maintained. Syntax: bool krsort( $array, $sorting_type ) Parameters: This function accepts two param

PHP ksort() Function

The ksort() function is an inbuilt function in PHP which is used to sort an array in ascending order according to its key values. It sorts in a way that the relationship between the indices and values is maintained. Syntax: bool ksort( $array, $sorting_type ) Parameters: This function accepts two pa

PHP list() Function

The list() function is an inbuilt function in PHP which is used to assign array values to multiple variables at a time. This function will only work on numerical arrays. When the array is assigned to multiple values, then the first element in the array is assigned to the first variable, second to th

PHP natcasesort() Function

The natcasesort() function is an inbuilt function in PHP which is used to sort an array by using a "natural order" algorithm. The natural order tells the order to be used as a normal human being would use. That is, it does not check the type of value for comparison. For example, in string representa

PHP natsort() Function

The natsort() function is an inbuilt function in PHP which is used to sort an array by using a “natural order” algorithm. The natural order tells the order to be used as a normal human being would use. That is, it does not check the type of value for comparison. For example, in string representation

PHP next() Function

The next() function is an inbuilt function in PHP and does the following operations: It is used to return the value of the next element in an array which the internal pointer is currently pointing to. We can know the current element by current function. The next() function increments the internal po

PHP pos() Function

The pos() is an inbuilt function in PHP which is used to return the value of the element in an array which the internal pointer is currently pointing to. The pos() function does not increment or decrement the internal pointer after returning the value. In PHP all arrays have an internal pointer. Thi

PHP prev() Function

The prev() function is an inbuilt function in PHP. It is used to return the immediate previous element from an array of the element which is currently pointed by the internal pointer. We have already discussed current() function in PHP. The current() function is used to return the value of the eleme

PHP range() Function

The range() function is an inbuilt function in PHP which is used to create an array of elements of any kind such as integer, alphabets within a given range(from low to high) i.e, list's first element is considered as low and last one is considered as high. Syntax: array range(low, high, step) Parame

PHP reset() Function

The reset() function is an inbuilt function in PHP. This function is used to move any array's internal pointer to the first element of that array. While working with arrays, it may happen that we modify the internal pointer of an array using different functions like prev() function, current() functi

PHP rsort() Function

The rsort() is an inbuilt function in PHP and is used to sort the array in descending order i.e, greatest to smallest. It sorts the actual array and hence changes are reflected in the array itself. The function provides us with 6 sorting types, according to which the array can be sorted. Syntax: rso

PHP shuffle() Function

The shuffle() Function is a builtin function in PHP and is used to shuffle or randomize the order of the elements in an array. This function assigns new keys for the elements in the array. It will also remove any existing keys, rather than just reordering the keys and assigns numeric keys starting f

PHP sizeof() Function

In this article, we will see how to get the length of the array using the sizeof() function in PHP. The sizeof() function is a built-in function in PHP and is used to count the number of elements present in an array or any other countable object. Syntax: int sizeof(array, mode);Parameter: This funct

PHP sort() Function

The sort() function is an inbuilt function in PHP and is used to sort an array in ascending order i.e, smaller to greater. It sorts the actual array and hence changes are reflected in the original array itself. The function provides us with 6 sorting types, according to which the array can be sorted

PHP uasort() Function

The uasort() function is a builtin function in PHP and is used to sort an array such that array indices maintain their correlation with the array elements they are associated with, using a user-defined comparison function. Syntax: boolean uasort(array_name, user_defined_function); Parameter: This fu

PHP uksort() Function

The uksort() function is a built-in function in PHP and is used to sort an array according to the keys and not values using a user-defined comparison function. Syntax: boolean uksort($array, myFunction);Parameter: This function accepts two parameters which are described below: $array: This parameter

PHP usort() Function

PHP comes with a number of built-in functions that are used to sort arrays in an easier way. Here, we are going to discuss a new function usort(). The usort() function in PHP sorts a given array by using a user-defined comparison function. This function is useful in case if we want to sort the array

PHP each() Function

The each() function is an inbuilt function in PHP and is used to get the current element key-value pair of the given array to which the internal pointer is currently pointing. After returning the key and value of the current element the internal pointer is incremented by one in the array. Note: You