Hướng dẫn how many array functions are there in php? - có bao nhiêu hàm mảng trong php?

The array functions allow you to access and manipulate arrays.

Simple and multi-dimensional arrays are supported.

The array functions are part of the PHP core. There is no installation needed to use these functions.

FunctionDescriptionarray() Creates an array array_change_key_case() Changes all keys in an array to lowercase or uppercase array_chunk() Splits an array into chunks of arrays array_column() Returns the values from a single column in the input array array_combine() Creates an array by using the elements from one "keys" array and one "values" array array_count_values() Counts all the values of an array array_diff() Compare arrays, and returns the differences (compare values only) array_diff_assoc() Compare arrays, and returns the differences (compare keys and values) array_diff_key() Compare arrays, and returns the differences (compare keys only) array_diff_uassoc() Compare arrays, and returns the differences (compare keys and values, using a user-defined key comparison function) array_diff_ukey() Compare arrays, and returns the differences (compare keys only, using a user-defined key comparison function) array_fill() Fills an array with values array_fill_keys() Fills an array with values, specifying keys array_filter() Filters the values of an array using a callback function array_flip() Flips/Exchanges all keys with their associated values in an array array_intersect() Compare arrays, and returns the matches (compare values only) array_intersect_assoc() Compare arrays and returns the matches (compare keys and values) array_intersect_key() Compare arrays, and returns the matches (compare keys only) array_intersect_uassoc() Compare arrays, and returns the matches (compare keys and values, using a user-defined key comparison function) array_intersect_ukey() Compare arrays, and returns the matches (compare keys only, using a user-defined key comparison function) array_key_exists() Checks if the specified key exists in the array array_keys() Returns all the keys of an array array_map() Sends each value of an array to a user-made function, which returns new values array_merge() Merges one or more arrays into one array array_merge_recursive() Merges one or more arrays into one array recursively array_multisort() Sorts multiple or multi-dimensional arrays array_pad() Inserts a specified number of items, with a specified value, to an array array_pop() Deletes the last element of an array array_product() Calculates the product of the values in an array array_push() Inserts one or more elements to the end of an array array_rand() Returns one or more random keys from an array array_reduce() Returns an array as a string, using a user-defined function array_replace() Replaces the values of the first array with the values from following arrays array_replace_recursive() Replaces the values of the first array with the values from following arrays recursively array_reverse() Returns an array in the reverse order array_search() Searches an array for a given value and returns the key array_shift() Removes the first element from an array, and returns the value of the removed element array_slice() Returns selected parts of an array array_splice() Removes and replaces specified elements of an array array_sum() Returns the sum of the values in an array array_udiff() Compare arrays, and returns the differences (compare values only, using a user-defined key comparison function) array_udiff_assoc() Compare arrays, and returns the differences (compare keys and values, using a built-in function to compare the keys and a user-defined function to compare the values) array_udiff_uassoc() Compare arrays, and returns the differences (compare keys and values, using two user-defined key comparison functions) array_uintersect() Compare arrays, and returns the matches (compare values only, using a user-defined key comparison function) array_uintersect_assoc() Compare arrays, and returns the matches (compare keys and values, using a built-in function to compare the keys and a user-defined function to compare the values) array_uintersect_uassoc() Compare arrays, and returns the matches (compare keys and values, using two user-defined key comparison functions) array_unique() Removes duplicate values from an array array_unshift() Adds one or more elements to the beginning of an array array_values() Returns all the values of an array array_walk() Applies a user function to every member of an array array_walk_recursive() Applies a user function recursively to every member of an array arsort() Sorts an associative array in descending order, according to the value asort() Sorts an associative array in ascending order, according to the value compact() Create array containing variables and their values count() Returns the number of elements in an array current() Returns the current element in an array each() Deprecated from PHP 7.2. Returns the current key and value pair from an array end() Sets the internal pointer of an array to its last element extract() Imports variables into the current symbol table from an array in_array() Checks if a specified value exists in an array key() Fetches a key from an array krsort() Sorts an associative array in descending order, according to the key ksort() Sorts an associative array in ascending order, according to the key list() Assigns variables as if they were an array natcasesort() Sorts an array using a case insensitive "natural order" algorithm natsort() Sorts an array using a "natural order" algorithm next() Advance the internal array pointer of an array pos() Alias of current() prev() Rewinds the internal array pointer range() Creates an array containing a range of elements reset() Sets the internal pointer of an array to its first element rsort() Sorts an indexed array in descending order shuffle() Shuffles an array sizeof() Alias of count() sort() Sorts an indexed array in ascending order uasort() Sorts an array by values using a user-defined comparison function uksort() Sorts an array by keys using a user-defined comparison function usort() Sorts an array using a user-defined comparison function

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