Collection Utilities

Valhalla's collection utilities extend PHP's existing array functions and operators to make advanced array manipulations, comparisons, and traversals effortless.

Available Functions:

Here is a list of each of the available functions in Collection and how they can be used. Note that each of these functions is static and therefore can be called without instantiating any objects.

merge:

Parameters:

• array $current
• array $new
• boolean $recursiveMerge (Optional) Defaults to true

Return Value: Returns an array containing values from $current and $new .

Accepts two arrays and an optional $recursiveMerge flag (defaults to true ) to indicate whether or not to merge the arrays recursively. The function merges the two arrays. Note that the second array is merged on top of the first, so its values can overwrite values in the first array. If $recurisveMerge is true then the function merges the individual items of sub-arrays, otherwise it just replaces them entirely.

arrayDiffRecursive:

Parameters:

• array $array1
• array $array2

Return Value: An array containing the entries from $array1 that are not present in $array2 or are different.

getFromArray:

Parameters:

• array $array
• string or int $key
• string $default (Optional) Defaults to empty string.
• int $validateFlag (Optional) Defaults to FILTER_DEFAULT

Return Value: Returns the content in $array at the specified key.

Gets a value from the array at the specified key. If unavailable or invalid (based on the specified filter), return the optionally specified default value.

getFromArrayPath:

Parameters:

• array $array
• string $path
• string $default (Optional) Defaults to empty string.
• int $validateFlag (Optional) Defaults to FILTER_DEFAULT

Return Value: Returns the data in $array at the specified path and validates it with the same logic as in getFromArray() .

For example:

Collection::getFromArrayPath($x, 'data/config/use_cookies');
#returns $x['data']['config']['use_cookies'];

setArrayPath:

Parameters:

• array $array
• string $path
• mixed $value
• boolean $createFullPath (Optional) Defaults to false

Return Value: None

Sets a value in the array based on a specified path. If any of the indices in the middle of the path do not exist (or are not arrays) an exception will be thrown unless $createFullPath is true in which case each missing or invalid index will be created.

For example:

$x = array('a' => array(1, 2, 3), 'b' => 'blah');
# Note: $x is not reset in between each example
setArrayPath($x, 'a/1', 5);
# Result:
# Array
# (
#     [a] => Array
#         (
#             [0] => 1
#             [1] => 5
#             [2] => 3
#         )
#     [b] => blah
# )

setArrayPath($x, 'd/4', 4);
#Result exception

setArrayPath($x, 'd/4', 4, true);
# Result:
# Array
# (
#     [a] => Array
#         (
#             [0] => 1
#             [1] => 5
#             [2] => 3
#         )
#     [b] => blah
#     [d] => Array
#         (
#             [4] => 4
#         )
# )

setArrayPath($x, 'b/b', 3, true);
# Result:
# Array
# (
#     [a] => Array
#         (
#             [0] => 1
#             [1] => 5
#             [2] => 3
#         )
#     [b] => Arrayls

#         (
#             [b] => 3
#         )
#     [d] => Array
#         (
#             [4] => 4
#         )
# )

isLast:

Parameters:

• array $array
• string or int $key

Return Value: Returns true if the provided key is the last element of an array otherwise false .

isFirst:

Parameters:

• array $array
• string or int $key

Return Value: Returns true if the provided key is the first element of an array otherwise false .