Sort the array operation functions in php

Arrays in PHP are actually an ordered graph. A graph is a type that maps values to keys. This type has been optimized in many aspects, so it can be used as a real array, or a list (vector), a scattered list (an implementation of a graph), a dictionary, set, stack, queue, and more possibilities. Because another PHP array can be used as the value, and the tree can be easily simulated. Array ([key =>] value, [key =>] value, [key =>] value, [key =>] value) // key can be integer or string // value can be any value

Array_change_key_case -- returns an array whose string key names are all in lowercase or uppercase.

Array_chunk -- splits an array into multiple

Array_combine -- creates an array with the value of one array as its key name and the value of another array as its value

Array_count_values -- count the number of occurrences of all values in the array

Array_diff_assoc -- calculate the array's difference set with index check

Array_diff_key -- use the key name to compare the difference set of the calculated array

Array_diff_uassoc -- use the callback function provided by the user for index check to calculate the array's difference set

Array_diff_ukey -- use the callback function to compare the difference set of the calculated array with the key name

Array_diff -- calculate the difference set of the array

Array_fill -- fill the array with the given value

Array_filter -- use the callback function to filter elements in the array.

Array_flip -- exchange keys and values in an array

Array_intersect_assoc -- Intersection of arrays computed by checking indexes

Array_intersect_key -- use the key name to compare and calculate the intersection of arrays

Array_intersect_uassoc -- calculates the intersection of arrays with index check and compares indexes with callback functions.

Array_intersect_ukey -- use the callback function to compare key names to calculate the intersection of arrays

Array_intersect -- calculates the intersection of arrays

Array_key_exists -- check whether the given key name or index exists in the array

Array_keys -- returns all the key names in the array.

Array_map -- calls the callback function to the unit of the given array.

Array_merge_recursive -- recursively merges one or more arrays

Array_merge -- merge one or more arrays

Array_multisort -- sorts multiple arrays or multi-dimensional arrays.

Array_pad -- fill the array with a value to the specified length

Array_pop -- bring up the last unit of the array (output stack)

Array_product -- calculate the product of all values in the array

Array_push -- push one or more units to the end of the array (into the stack)

Array_rand -- randomly retrieve one or more units from the array

Array_reduce -- use the callback function to iteratively simplify the array to a single value

Array_reverse -- returns an array with the opposite unit order.

Array_search -- search for a given value in the array. if the value is successful, the corresponding key name is returned.

Array_shift -- removes elements starting with an array from the array

Array_slice -- extract a segment from the array

Array_splice -- remove part of the array and replace it with other values

Array_sum -- calculate the sum of all values in the array

Array_udiff_assoc -- calculate the difference set of the array with index check, and use the callback function to compare data

Array_udiff_uassoc -- calculate the difference set of the array with index check, and use the callback function to compare data and indexes.

Array_udiff -- use the callback function to compare data to calculate the difference set of the array

Array_uintersect_assoc -- calculates the intersection of arrays with index check and compares data with callback functions.

Array_uintersect_uassoc -- calculates the intersection of arrays with index check, and compares data and indexes with callback functions.

Array_uintersect -- calculates the intersection of arrays and compares data with callback functions.

Array_unique -- Remove repeated values from the array

Array_unshift -- insert one or more units at the beginning of the array

Array_values -- returns all values in the array.

Array_walk_recursive -- recursively applies user functions to each member in the array

Array_walk -- apply user functions to each member in the array

Array -- create an array

Arsort-sorts arrays in reverse order and maintains the index relationship.

Asort -- sorts arrays and maintains the index relationship.

Compact -- create an array, including variable names and their values

Count (sizeof) -- calculates the number of units in the array or the number of attributes in the object.

Current -- returns the current unit in the array.

Each -- returns the current key/value pair in the array and moves the array pointer one step forward.

End -- points the internal pointer of the array to the last unit.

Extract -- import the variable from the array to the current symbol table

In_array -- check whether a value exists in the array

Key -- get the key name from the joined array

Krsort-sort the array in reverse order by key name

Ksort -- sort the array by key name

List -- assign values in the array to some variables

Natcasesort-use the "natural sorting" algorithm to sort arrays by case-insensitive letters

Natsort -- sort the array using the "natural sorting" algorithm. next -- move the internal pointer in the array one by one

Pos -- current () alias prev -- returns the internal pointer of the array to a range -- creates an array containing the specified range unit