PHP-Handbuch: Returns the value for a given key.

Beschreibung

public mixed Ds\Map::get ( mixed $key [, mixed $default ] )

Returns the value for a given key, or an optional default value if the key could not be found.

Hinweis:
Keys of type object are supported. If an object implements Ds\Hashable, equality will be determined by the object's equals function. If an object does not implement Ds\Hashable, objects must be references to the same instance to be considered equal.

Hinweis:
You can also use array syntax to access values by key, eg. $map["key"].

Achtung

Be careful when using array syntax. Scalar keys will be coerced to integers by the engine. For example, $map["1"] will attempt to access int(1), while $map->get("1") will correctly look up the string key.

See Arrays.

Parameter-Liste

key: The key to look up.
default: The optional default value, returned if the key could not be found.

Rückgabewerte

The value mapped to the given key, or the default value if provided and the key could not be found in the map.

Fehler/Exceptions

OutOfBoundsException if the key could not be found and a default value was not provided.

Beispiele

Beispiel #1 Ds\Map::get example


<?php
$map = new \Ds\Map(["a" => 1, "b" => 2, "c" => 3]);

var_dump($map->get("a"));       // 1
var_dump($map->get("d", 10));   // 10 (default used)
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

int(1)
int(10)

Beispiel #2 Ds\Map::get example using array syntax


<?php
$map = new \Ds\Map(["a" => 1, "b" => 2, "c" => 3]);

var_dump($map["a"])); // 1
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

int(1)