ArrayHelper

Type
Class
Namespace
craft\helpers
Inherits
craft\helpers\ArrayHelper » yii\helpers\ArrayHelper » yii\helpers\BaseArrayHelper
Since
3.0

Class ArrayHelper

View source

Public Methods

MethodDescription
filter()Filters array according to rules specified.
filterByValue()Filters an array to only the values where a given key (the name of a sub-array key or sub-object property) is set to a given value.
filterEmptyStringsFromArray()Filters empty strings from an array.
firstKey()Returns the first key in a given array.
firstValue()Returns the first value in a given array.
getColumn()Returns the values of a specified column in an array.
getValue()Retrieves the value of an array element or object property with the given key or property name.
htmlDecode()Decodes HTML entities into the corresponding characters in an array of strings.
htmlEncode()Encodes special characters in an array of strings into HTML entities.
index()Indexes and/or groups the array according to a specified key.
isAssociative()Returns a value indicating whether the given array is an associative array.
isIn()Check whether an array or Traversable contains an element.
isIndexed()Returns a value indicating whether the given array is an indexed array.
isSubset()Checks whether an array or Traversable is a subset of another array or Traversable.
isTraversable()Checks whether a variable is an array or Traversable.
keyExists()Checks if the given array contains the specified key.
map()Builds a map (key-value pairs) from a multidimensional array or an array of objects.
merge()Merges two or more arrays into one recursively.
multisort()Sorts an array of objects or arrays (with the same structure) by one or several keys.
prependOrAppend()Prepends or appends a value to an array.
remove()Removes an item from an array and returns the value. If the key does not exist in the array, the default value will be returned instead.
removeValue()Removes items with matching values from the array and returns the removed items.
rename()Renames an item in an array. If the new key already exists in the array and the old key doesn’t, the array will be left unchanged.
setValue()Writes a value into an associative array at the key path specified.
toArray()Converts an object or an array of objects into an array.
without()Returns a copy of an array without a given key.
withoutValue()Returns a copy of an array without items with matching the given value.

filterByValue()

Filters an array to only the values where a given key (the name of a sub-array key or sub-object property) is set to a given value. Array keys are preserved.

View source

Arguments

  • $array (array, Traversable) – The array that needs to be indexed or grouped
  • $key (string, Closure) – The column name or anonymous function which result will be used to index the array
  • $value (mixed) – The value that $key should be compared with
  • $strict (boolean) – Whether a strict type comparison should be used when checking array element values against $value

Returns

array – The filtered array

Signature

public static array filterByValue ( $array, $key, $value, \craft\helpers\bool $strict = false )

filterEmptyStringsFromArray()

Filters empty strings from an array.

View source

Arguments

Returns

array

Signature

public static array filterEmptyStringsFromArray ( array $arr )

firstKey()

Returns the first key in a given array.

View source

Arguments

Returns

string, integer, null – The first key, whether that is a number (if the array is numerically indexed) or a string, or null if $arr isn’t an array, or is empty.

Signature

public static string, integer, null firstKey ( array $arr )

firstValue()

Returns the first value in a given array.

View source

Arguments

Returns

mixed – The first value, or null if $arr isn’t an array, or is empty.

Signature

public static mixed firstValue ( array $arr )

prependOrAppend()

Prepends or appends a value to an array.

View source

Arguments

  • $array
  • $value (mixed) – The value to prepend/append to the array
  • $prepend (boolean) – true will prepend the value; false will append it

Signature

public static void prependOrAppend ( array &$array, $value, \craft\helpers\bool $prepend )

rename()

Renames an item in an array. If the new key already exists in the array and the old key doesn’t, the array will be left unchanged.

View source

Arguments

  • $array (array) – The array to extract value from
  • $oldKey (string) – Old key name of the array element
  • $newKey (string) – New key name of the array element
  • $default (mixed) – The default value to be set if the specified old key does not exist

Signature

public static void rename ( array &$array, \craft\helpers\string $oldKey, \craft\helpers\string $newKey, $default = null )

toArray()

Converts an object or an array of objects into an array.

View source

Arguments

  • $object (object, array, string) – The object to be converted into an array
  • $properties (array) – A mapping from object class names to the properties that need to put into the resulting arrays. The properties specified for each class is an array of the following format:
[
    'app\models\Post' => [
        'id',
        'title',
        // the key name in array result => property name
        'createTime' => 'created_at',
        // the key name in array result => anonymous function
        'length' => function ($post) {
            return strlen($post->content);
        },
    ],
]

The result of ArrayHelper::toArray($post, $properties) could be like the following:

[
    'id' => 123,
    'title' => 'test',
    'createTime' => '2013-01-01 12:00AM',
    'length' => 301,
]
  • $recursive (boolean) – Whether to recursively converts properties which are objects into arrays.

Returns

array – The array representation of the object

Signature

public static array toArray ( $object, $properties = [], $recursive = true )

without()

Returns a copy of an array without a given key.

View source

Arguments

Returns

array

Signature

public static array without ( array $array, \craft\helpers\string $key )

withoutValue()

Returns a copy of an array without items with matching the given value.

View source

Arguments

  • $array (array)
  • $value (mixed)

Returns

array

Signature

public static array withoutValue ( array $array, $value )