(PHP 4 >= 4.0.5, PHP 5)
array_search -- Searches the array for a given value and returns the corresponding key if successfulSearches haystack for needle and returns the key if it is found in the array, FALSE otherwise.
Bemærk: If needle is a string, the comparison is done in a case-sensitive manner.
Bemærk: Prior to PHP 4.2.0, array_search() returns NULL on failure instead of FALSE.
If the optional third parameter strict is set to TRUE then the array_search() will also check the types of the needle in the haystack.
If needle is found in haystack more than once, the first matching key is returned. To return the keys for all matching values, use array_keys() with the optional search_value parameter instead.
Advarsel |
Denne funktion returnerer muligvis en Boolean FALSE, men kan også returnere en ikke-Booleansk værdi som evalueres til FALSE, så som 0 eller "". Læs venligst sektionen om Booleans for mere information. brug === operatoren for at teste den værdi som returneres af denne funktion. |
See also array_keys(), array_values(), array_key_exists(), and in_array().