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* * * ## PHP Array Introduction PHP Array functions allow you to access and manipulate arrays. Supports both simple and multidimensional arrays. * * * ## Installation The PHP Array functions are part of the PHP core. These functions can be used without any installation. * * * ## PHP 5 Array Functions | Function | Description | | --- | --- | | [array()]( | Creates an array. | | [array_change_key_case()]( | Returns an array with all keys in uppercase or lowercase. | | [array_chunk()]( | Splits an array into chunks. | | [array_column()]( | Returns the values from a single column in the input array. | | [array_combine()]( | Creates a new array by combining two arrays (one for keys, one for values). | | [array_count_values()]( | Used to count the number of occurrences of all values in an array. | | [array_diff()]( | Compares arrays and returns the difference between two arrays (compares only values). | | [array_diff_assoc()]( | Compares arrays and returns the difference between two arrays (compares keys and values). | | [array_diff_key()]( | Compares arrays and returns the difference between two arrays (compares only keys). | | [array_diff_uassoc()]( | Compares arrays and returns the difference between two arrays (compares keys and values using a user-defined key comparison function). | | [array_diff_ukey()]( | Compares arrays and returns the difference between two arrays (compares only keys using a user-defined key comparison function). | | [array_fill()]( | Fills an array with the specified values. | | [array_fill_keys()]( | Fills an array with the specified values using given keys. | | [array_filter()]( | Filters array elements using a callback function. | | [array_flip()]( | Reverses/switches the keys and their associated values in an array. | | [array_intersect()]( | Compares arrays and returns the intersection of two arrays (compares only values). | | [array_intersect_assoc()]( | Compares arrays and returns the intersection of two arrays (compares keys and values). | | [array_intersect_key()]( | Compares arrays and returns the intersection of two arrays (compares only keys). | | [array_intersect_uassoc()]( | Compares arrays and returns the intersection of two arrays (compares keys and values using a user-defined key comparison function). | | [array_intersect_ukey()]( | Compares arrays and returns the intersection of two arrays (compares only keys using a user-defined key comparison function). | | [array_key_exists()]( | Checks if a specified key exists in an array. | | [array_key_first()]( | Gets the first key value of a specified array. | | [array_key_last()]( | Gets the last key value of a specified array. | | [array_keys()]( | Returns all keys in an array. | | [array_map()]( | Applies a user-defined function to each value of a given array and returns new values. | | [array_merge()]( | Merges one or more arrays into a single array. | | [array_merge_recursive()]( | Recursively merges one or more arrays into a single array. | | [array_multisort()]( | Sorts multiple arrays or multi-dimensional arrays. | | [array_pad()]( | Inserts a specified number of elements with a specified value into an array. | | [array_pop()]( | Removes the last element from an array (pops from the stack). | | [array_product()]( | Calculates the product of all values in an array. | | [array_push()]( | Inserts one or more elements at the end of an array (pushes onto the stack). | | [array_rand()]( | Randomly selects one or more elements from an array and returns their keys. | | [array_reduce()]( | Iteratively reduces an array to a single string using a user-defined function and returns it. | | [array_replace()]( | Replaces the values of the first array with values from subsequent arrays. | | [array_replace_recursive()]( | Recursively replaces the values of the first array with values from subsequent arrays. | | [array_reverse()]( | Reverses the order of elements in the original array, creates a new array, and returns it. | | [array_search()]( | Searches for a given value in an array; if successful, returns the corresponding key. | | [array_shift()]( | Removes the first element from an array and returns the value of the removed element. | | [array_slice()]( | Returns a portion of an array. | | [array_splice()]( | Removes specified elements from an array and replaces them with other values. | | [array_sum()]( | Returns the sum of all values in an array. | | [array_udiff()]( | Compares arrays and returns the difference between two arrays (compares only values using a user-defined key comparison function). | | [array_udiff_assoc()]( | Compares arrays and returns the difference between two arrays (compares keys and values; uses built-in function for key comparison, user-defined function for value comparison). | | [array_udiff_uassoc()]( | Compares arrays and returns the difference between two arrays (compares keys and values using two user-defined key comparison functions). | | [array_uintersect()]( | Compares arrays and returns the intersection of two arrays (compares only values using a user-defined key comparison function). | | [array_uintersect_assoc()]( | Compares arrays and returns the intersection of two arrays (compares keys and values; uses built-in function for key comparison, user-defined function for value comparison). | | [array_uintersect_uassoc()]( | Compares arrays and returns the intersection of two arrays (compares keys and values using two user-defined key comparison functions). | | [array_unique()]( | Removes duplicate values from an array. | | [array_unshift()]( | Inserts one or more elements at the beginning of an array. | | [array_values()]( | Returns all values in an array. | | [array_walk()]( | Applies a user function to each member of an array. | | [array_walk_recursive()]( | Recursively applies a user function to each member of an array. | | [arsort()]( | Sorts an associative array in descending order by value. | | [asort()]( | Sorts an associative array in ascending order by value. | | [compact()]( | Creates an array containing variable names and their values. | | [count()]( | Returns the number of elements in an array. | | [current