PHP array_key_exists() Function6 Jan 2025 | 1 min read The array_key_exists( ) is an builtin function of PHP. The array_key_exists( ) function checks an array for a specified key, and returns true if the key exists and false if the key does not exists. This function was introduced in PHP 4.0.7. Syntax
Return TypeThe array_key_exists( ) function returns true if the key exists and false if the key does not exist. EXAMPLE 1Output: Key does not exist! EXAMPLE 2Output: Key exists! EXAMPLE 3Output: Found EXAMPLE 4Output: Key exists! Next TopicPhp-array-key-first-function |
The compact( ) function is an inbuilt function of PHP, and it is used to create an array from variables and their values. This function was introduced in PHP 4+. Syntax array compact ( mixed $varname1 [, mixed $... ] ); Parameters Parameter Description Is compulsory Variable1 It can be either a string...
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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...
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The array_uintersect_uassoc( ) is an inbuilt function of PHP. The array_uintersect_uassoc() function uses two user-defined functions to compare the keys and values of two or more arrays, and returns the matches. This function was introduced in PHP 5.0. Syntax array array_uintersect_uassoc ( array $array1 , array $array2...
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The array_key_last( ) function is used to get the last key of an array. This function was introduced in PHP 7.3.0 Syntax mixed array_key_last ( array $array ); Parameters Parameter Description Is compulsory array Specifies the array. compulsory Return Values The array_key_last( ) function returns the last key of the array if the array is not...
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PHP asort() Function The asort( ) function is an inbuilt function of PHP. The asort( ) function is used to sort an associative array in ascending order, according to the value. This function was introduced in PHP 4.0. Syntax bool asort ( array &$array [, int $sort_flags =...
1 min read
The array_intersect_uassoc( ) function is an inbuilt function in PHP. The array_intersect_uassoc( ) function is used to compare key and values of two or more arrays by using a user-defined comparison function and return the matches. It returns an array containing all the values of...
2 min read
The array_intersect_key( ) function computes the intersection of arrays using keys for comparison. This function compares the keys of two or more arrays and returns the matches. This function compares the keys of two or more arrays and returns an array that contains the entries...
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PHP krsort() Function The PHP krsort( ) function is used to sort the array elements by the key in descending order. It is mainly used in the associative array. This function was introduced in PHP 4.0. Syntax bool krsort ( array &$array [, int $sort_flags = SORT_REGULAR ]...
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PHP natcasesort() Function The natcasesort( ) function is used to sort an array using a case insensitive "natural array" algorithm. The function implements a sort algorithm but maintains original keys and values. This function was introduced in PHP 4.0. Syntax bool natcasesort ( array &$array ); Parameter Parameter Description Is compulsory array The input...
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PHP () Function The PHP ( ) function is used to fetch the array value in the ious place, pointed by the internal array pointer. This function was introduced in PHP 4.0. Syntax mixed ( array &$array ); Parameter Parameter Description Is compulsory array Specifies the array to use. compulsory Returns The ( ) function returns...
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