Miscellaneous in arrays of PHP array functions

Array_change_key_case ($arr, Case_lower | | Case_upper) returns an array whose key names are all uppercase or lowercase

Array_rand ($arr, num) randomly extracts one or more cells from an array

Shuffle (& $arr) scrambling the array

Array_chunk ($arr, $size, BOOL) splits the $arr, each array is $size elements, and BOOL remains the original index

Array_combine ($arr, $arr 2) Merge two arrays $arr key Name Key name $arr 2 key value

Array_count_values ($arr); Returns the value of an array $arr the number of times the key name appears in the array

Array_slice ($arr) take a paragraph out of the array

Array_fill ($start, $Num, $value) fills Num times from start with value

Array_pad ($arr, Pad_size, Pad_value) uses value to add $arr to the length of size, the size is the positive complement of the array, or vice versa.

Array_merge ($arr, $arr 2, [...]) Merge one or two array key names with the same overlay

Array_merge_recursive ($arr, $arr 2 [...]) recursively merge one or more arrays

Array_reverse ($arr) returns an array of cells in reverse order

Array_filter ($arr, ' callback '); Filter arrays with callback functions

Array_unique ($arr); Move duplicate values in an array

Array_splice ($arr) Remove part of the array and replace it with other values

Array_flip ($arr); Reverses the array, if a value appears multiple times last key name as his value

Array_key_exists ($key, $arr) whether the given key name and index exist in the array

In_array ($key, $arr) whether a value exists in the array

Array_keys ($arr) returns all the key names in the array

Array_search (' key ', $arr) searches the array for the given value successfully returns the key name

Array_values ($arr) returns all the key values in the array

Count ($arr) The number of attributes in an array of cells or objects in the middle age

Array_sum ($arr) The and of all values in the array

List ($arr) assigns the values in the array to some variables

Array_map (' function ', $arr) functions The callback function on the cell of the given array;

Array_walk ($arr, ' function ') apply user function to each member in the array

Array_walk ($arr, ' callback ') apply user function recursively for each member in an array

Array_reduce ($arr, ' callback ', ' initial ') the array is reduced to a single value using the user-defined function of the array

Array_pridect ($arr) The product of all values in an array

Compact (' AA ', $arr) adds variables to the array

Extract ($arr) array to import variables into the current symbol table

Array_pop ($arr) POPs the last cell of the array to the length and minus one (out of the stack)

Array_push ($arr, mixed) presses one or more cells into the end of the array (into the stack)

Array_shift (& $arr); Move the cells at the beginning of the array to the divisor group

Array_unshift ($arr, $mixed); Insert one or more cells from the beginning of an array

Miscellaneous in arrays of PHP array functions