An array is a data structure that can hold one or ore similar types of data in a single value.
There are three types of an array-
1-Indexed Array
2-Associative Array
3-Multi-dimensional Array
Creates an array
array() ex. Syntax for indexed arrays: array(value1, value2, value3, etc.) Syntax for associative arrays: array(key=>value,key=>value,key=>value,etc.)
Changes all keys in an array to lowercase or uppercase
ex. array_change_key_case(array, case)
CASE_LOWER, CASE_UPPER
array_change_key_case()
array_chunk()
Splits an array into chunks of arrays
ex. array_chunk(array, size, preserve_key)
array_column()
Returns the values from a single column in the input array
ex.array_column(array, column_key, index_key)
array_combine()
Creates an array by using the elements from one “keys” array and one “values” array
ex. array_combine(keys, values)
array_count_values()
Counts all the values of an array
ex. array_count_values(array)
array_diff()
Compare arrays, and returns the differences (compare values only)
ex. array_diff(array1, array2, array3, ...)
array_diff_assoc()
Compare arrays, and returns the differences (compare keys and values)
ex.array_diff_assoc(array1,array2,array3...)
array_diff_key()
Compare arrays, and returns the differences (compare keys only)
ex. array_diff_key(array1, array2, array3, ...)
array_diff_uassoc()
Compare arrays, and returns the differences (compare keys and values, using a user-defined key comparison function)
ex. array_diff_uassoc(array1, array2, array3, ..., myfunction)
array_diff_ukey()
Compare arrays, and returns the differences (compare keys only, using a user-defined key comparison function)
ex. array_diff_ukey(array1, array2, array3, ..., myfunction)
array_fill()
Fills an array with values
ex. array_fill(index, number, value)
array_fill_keys()
Fills an array with values, specifying keys
ex. array_fill_keys(keys, value)
array_filter()
Filters the values of an array using a callback function
ex.array_filter(array, callbackfunction, flag)
array_flip()
Flips/Exchanges all keys with their associated values in an array
ex. array_flip(array)
array_intersect()
Compare arrays, and returns the matches (compare values only)
ex. array_intersect(array1, array2, array3, ...)
array_intersect_assoc()
Compare arrays and returns the matches (compare keys and values)
ex. array_intersect_assoc(array1,array2,array3, ...)
array_intersect_key()
Compare arrays, and returns the matches (compare keys only)
ex. array_intersect_key(array1, array2, array3, ...)
array_intersect_uassoc()
Compare arrays, and returns the matches (compare keys and values, using a user-defined key comparison function)
ex. array_intersect_uassoc(array1, array2, array3, ..., myfunction)
array_intersect_ukey()
Compare arrays, and returns the matches (compare keys only, using a user-defined key comparison function)
ex. array_intersect_ukey(array1, array2, array3, ..., myfunction)
array_key_exists()
Checks if the specified key exists in the array
ex. array_key_exists(key, array)
array_keys()
Returns all the keys of an array
ex. array_keys(array, value, strict)
array_map()
Sends each value of an array to a user-made function, which returns new values
ex. array_map(myfunction, array1, array2, array3, ...)
array_merge()
Merges one or more arrays into one array
ex. array_merge(array1, array2, array3, ...)
array_merge_recursive()
Merges one or more arrays into one array recursively
ex. array_merge_recursive(array1, array2, array3, ...)
array_multisort()
Sorts multiple or multi-dimensional arrays
ex. array_multisort(array1, sortorder, sorttype, array2, array3, ...)
array_pad()
Inserts a specified number of items, with a specified value, to an array
ex. array_pad(array, size, value)
array_pop()
Deletes the last element of an array
ex. array_pop(array)
array_product()
Calculates the product of the values in an array
ex.array_product(array)
array_push()
Inserts one or more elements to the end of an array
ex. array_push(array, value1, value2, ...)
array_rand()
Returns one or more random keys from an array
ex. array_rand(array, number)
array_reduce()
Returns an array as a string, using a user-defined function
ex. array_reduce(array, myfunction, initial)
array_replace()
Replaces the values of the first array with the values from following arrays
ex. array_replace(array1, array2, array3, ...)
array_replace_recursive()
Replaces the values of the first array with the values from following arrays recursively
ex. array_replace_recursive(array1, array2, array3, ...)
array_reverse()
Returns an array in the reverse order
ex. array_reverse(array, preserve)
array_search()
Searches an array for a given value and returns the key
ex. array_search(value, array, strict)
array_shift()
Removes the first element from an array, and returns the value of the removed element
ex. array_shift(array)
array_slice()
Returns selected parts of an array
ex. array_slice(array, start, length, preserve)
array_splice()
Removes and replaces specified elements of an array
ex. array_splice(array, start, length, array)
array_sum()
Returns the sum of the values in an array
ex. array_sum(array)
array_udiff()
Compare arrays, and returns the differences (compare values only, using a user-defined key comparison function)
ex. array_udiff(array1, array2, array3, ..., myfunction)
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)
ex. array_udiff_assoc(array1, array2, array3, ..., myfunction)
