PHP Array Constants
| Sr.No | Constant & Description |
|---|---|
| 1 | CASE_LOWER Used with array_change_key_case() to convert array keys to lower case |
| 2 |
CASE_UPPER Used with array_change_key_case() to convert array keys to upper case |
| 3 |
SORT_ASC Used with array_multisort() to sort in ascending order |
| 4 |
SORT_DESC Used with array_multisort() to sort in descending order |
| 5 |
SORT_REGULAR Used to compare items normally |
| 6 |
SORT_NUMERIC Used to compare items numerically |
| 7 |
SORT_STRING Used to compare items as strings |
| 8 |
SORT_LOCALE_STRING Used to compare items as strings, based on the current locale |
| 9 |
COUNT_NORMAL |
| 10 |
COUNT_RECURSIVE |
| 11 |
EXTR_OVERWRITE |
| 12 |
EXTR_SKIP |
| 13 |
EXTR_PREFIX_SAME |
| 14 |
EXTR_PREFIX_ALL |
| 15 |
EXTR_PREFIX_INVALID |
| 16 |
EXTR_PREFIX_IF_EXISTS |
| 17 | EXTR_IF_EXISTS |
| 18 | EXTR_REFS |
List of Functions
PHP − indicates the earliest version of PHP that supports the function.| Sr.No | Function & Description | PHP |
|---|---|---|
| 1 | array() Create an array | 3 |
| 2 | array_change_key_case()
Returns an array with all keys in lowercase or uppercase |
4 |
| 3 | array_chunk()
Splits an array into chunks of arrays |
4 |
| 4 | array_combine()
Creates an array by using one array for keys and another for its values |
5 |
| 5 | array_count_values()
Returns an array with the number of occurrences for each value |
4 |
| 6 | array_diff()
Compares array values, and returns the differences |
4 |
| 7 | array_diff_assoc()
Compares array keys and values, and returns the differences |
4 |
| 8 | array_diff_key()
Compares array keys, and returns the differences |
5 |
| 9 | array_diff_uassoc()
Compares array keys and values, with an additional user-made function check, and returns the differences |
5 |
| 10 | array_diff_ukey()
Compares array keys, with an additional user-made function check, and returns the differences |
5 |
| 11 | array_fill()
Fills an array with values |
4 |
| 12 | array_fill_keys()
Fill an array with values, specifying keys |
5 |
| 13 | array_filter()
Filters elements of an array using a user-made function |
4 |
| 14 | array_flip()
Exchanges all keys with their associated values in an array |
4 |
| 15 | array_intersect()
Compares array values, and returns the matches |
4 |
| 16 | array_intersect_assoc()
Compares array keys and values, and returns the matches |
4 |
| 17 | array_intersect_key()
Compares array keys, and returns the matches |
5 |
| 18 | array_intersect_uassoc()
Compares array keys and values, with an additional user-made function check, and returns the matches |
5 |
| 19 | array_intersect_ukey()
Compares array keys, with an additional user-made function check, and returns the matches |
5 |
| 20 | array_key_exists()
Checks if the specified key exists in the array |
4 |
| 21 | array_keys()
Returns all the keys of an array |
4 |
| 22 | array_map()
Sends each value of an array to a user-made function, which returns new values |
4 |
| 23 | array_merge()
Merges one or more arrays into one array |
4 |
| 24 | array_merge_recursive()
Merges one or more arrays into one array |
4 |
| 25 | array_multisort()
Sorts multiple or multi-dimensional arrays |
4 |
| 26 | array_pad()
Inserts a specified number of items, with a specified value, to an array |
4 |
| 27 | array_pop()
Deletes the last element of an array |
4 |
| 28 | array_product()
Calculates the product of the values in an array |
5 |
| 29 | array_push()
Inserts one or more elements to the end of an array |
4 |
| 30 | array_rand()
Returns one or more random keys from an array |
4 |
| 31 | array_reduce()
Returns an array as a string, using a user-defined function |
4 |
| 32 | array_reverse()
Returns an array in the reverse order |
4 |
| 33 | array_search()
Searches an array for a given value and returns the key |
4 |
| 34 | array_shift()
Removes the first element from an array, and returns the value of the removed element |
4 |
| 35 | array_slice()
Returns selected parts of an array |
4 |
| 36 | array_splice()
Removes and replaces specified elements of an array |
4 |
| 37 | array_sum()
Returns the sum of the values in an array |
4 |
| 38 | array_udiff()
Compares array values in a user-made function and returns an array |
5 |
| 39 | array_udiff_assoc()
Compares array keys, and compares array values in a user-made function, and returns an array |
5 |
| 40 | array_udiff_uassoc()
Compares array keys and array values in user-made functions, and returns an array |
5 |
| 41 | array_uintersect()
Compares array values in a user-made function and returns an array |
5 |
| 42 | array_uintersect_assoc()
Compares array keys, and compares array values in a user-made function, and returns an array |
5 |
| 43 | array_uintersect_uassoc()
Compares array keys and array values in user-made functions, and returns an array |
5 |
| 44 | array_unique()
Removes duplicate values from an array |
4 |
| 45 | array_unshift()
Adds one or more elements to the beginning of an array |
4 |
| 46 | array_values()
Returns all the values of an array |
4 |
| 47 | array_walk()
Applies a user function to every member of an array |
3 |
| 48 | array_walk_recursive()
Applies a user function recursively to every member of an array |
5 |
| 49 | arsort()
Sorts an array in reverse order and maintain index association |
3 |
| 50 | asort()
Sorts an array and maintain index association |
3 |
| 51 | compact()
Create array containing variables and their values |
4 |
| 52 | count()
Counts elements in an array, or properties in an object |
3 |
| 53 | current()
Returns the current element in an array |
3 |
| 54 | each()
Returns the current key and value pair from an array |
3 |
| 55 | end()
Sets the internal pointer of an array to its last element |
3 |
| 56 | extract()
Imports variables into the current symbol table from an array |
3 |
| 57 | in_array()
Checks if a specified value exists in an array |
4 |
| 58 | key()
Fetches a key from an array |
3 |
| 59 | krsort()
Sorts an array by key in reverse order |
3 |
| 60 | ksort() Sorts an array by key | 3 |
| 61 | list()
Assigns variables as if they were an array |
3 |
| 62 | natcasesort()
Sorts an array using a case insensitive "natural order" algorithm |
4 |
| 63 | natsort()
Sorts an array using a "natural order" algorithm |
4 |
| 64 | next()
Advance the internal array pointer of an array |
3 |
| 65 | pos()
Alias of current() |
3 |
| 66 | prev()
Rewinds the internal array pointer |
3 |
| 67 | range()
Creates an array containing a range of elements |
3 |
| 68 | reset()
Sets the internal pointer of an array to its first element |
3 |
| 69 | rsort()
Sorts an array in reverse order |
3 |
| 70 | shuffle()
Shuffles an array |
3 |
| 71 | sizeof()
Alias of count() |
3 |
| 72 | sort()
Sorts an array |
3 |
| 73 | uasort()
Sorts an array with a user-defined function and maintain index association |
3 |
| 74 | uksort()
Sorts an array by keys using a user-defined function |
3 |
| 75 | usort() Sorts an array by values using a user-defined function |
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