Notes on PHP array functions

PHP array function note array_change_key_case -- returns an array of array_chunk whose string keys are all lowercase or uppercase -- splits an array into multiple array_combine -- creates an array, use 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 times all values in the array appear in array_di PHP array function notes

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 -- 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 arrays using the "natural sorting" algorithm
Next -- move the internal pointer in the array to a forward position
Alias of pos -- current ()
Prev -- returns the internal pointer of the array to one
Range -- create an array containing the specified range units
Reset -- point the internal pointer of the array to the first unit
Rsort -- reverse sorting of arrays
Shuffle -- disrupt the array
Sizeof -- count () alias
Sort -- sort arrays
Uasort -- sort the values in the array using the user-defined comparison function and maintain the index Association
Uksort -- sort the key names in the array using the user-defined comparison function
Usort -- sort the values in the array using the user-defined comparison function