PHP array_key_first() Function6 Jan 2025 | 1 min read The array_key_first( ) function is used to get the first key of an array. This function was introduced in PHP 7.3.0 SyntaxParameters
Return ValuesThe array_key_first( ) function returns the first key of the array if the array is not empty, otherwise null. IMPORTANT NOTE- The above two functions are introduced in PHP 7.3.0 that is not released officially that's why example is not given in the above functions.Next TopicPhp-array-key-function |
The array_udiff( ) function is an inbuilt function of PHP. The array_udiff( ) function is used to compute the difference of given arrays by using a callback function for data comparison. This function was introduced in PHP 5.1.0. Syntax array array_udiff ( array $array1 , array $array2...
1 min read
The array_intersect( ) function is used to Computes the intersection of arrays. It compares two or more arrays and returns an array containing all the values of the first array that are present in other arrays. In this operation, keys are preserved. This function was...
1 min read
The array_combine() function is an inbuilt function in PHP. This function is introduced in PHP 5. It is used to create an array by using one array for keys and another for its values. Syntax array_combine(array_keys,array_values); Parameter Description Is compulsory array_keys The keys of the array to be used compulsory array_values The values of the...
1 min read
PHP uksort() Function The PHP uksort( ) function is used to sort an array by the elements keys using a user-defined comparison function. This function was introduced in PHP 4.0. Syntax bool uksort ( array &$array , callable $key_compare_func ); Parameter Parameter Description Is compulsory array Specifies the array to be sorted. compulsory user_defined_function This function is...
2 min read
PHP natcasesort() Function The natcasesort( ) function is used to sort an array using a case insensitive "natural array" algorithm. The function implements a sort algorithm but maintains original keys and values. This function was introduced in PHP 4.0. Syntax bool natcasesort ( array &$array ); Parameter Parameter Description Is compulsory array The input...
2 min read
PHP array_fill( ) Function The array_fill( ) function is used to fill an array with values. This function creates a user-defined array with a given pre-filled value. It was introduced in PHP 4. Syntax array array_fill ( int $start_index , int $num , mixed $value ) Parameter Parameter Description Is compulsory starting_index The first...
1 min read
The array_walk( ) function is an inbuilt function of PHP. It is used to apply a user supplied function to every element of an array. This function was introduced in 4.0. Syntax bool array_walk ( array &$array , callable $callback [, mixed $userdata = NULL ] ); Parameters Parameter Description Is...
1 min read
The array_udiff_uassoc( ) function is an inbuilt function of PHP. The array_udiff_uassoc( ) function compares two or more arrays in two user-made functions, and returns an array containing the elements from the first array. This function was introduced in PHP 5.0. Syntax array array_udiff_uassoc ( array $array1...
2 min read
The count( ) function is an inbuilt function of PHP, and it is used to count the elements of an array or the properties of an object. This function was introduced in PHP 4.0. Syntax int count ( mixed $array_or_countable [, int $mode = COUNT_NORMAL ] ); Parameters Parameter Description Is...
1 min read
The array_uintersect() is an inbuilt function in PHP. It 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...
1 min read
We request you to subscribe our newsletter for upcoming updates.
We provides tutorials and interview questions of all technology like java tutorial, android, java frameworks
G-13, 2nd Floor, Sec-3, Noida, UP, 201301, India
Python
Java
JavaScript
SQL
C
C++
HTML
CSS
React
Node.js
Spring Boot
C#
PHP
MySQL
MongoDB
AI
ML
DSA
DBMS
OS
Aptitude
Reasoning