如何在PHP中为关联数组执行in_array

Question

Is there any PHP function to perform in_array() for associative array? I know how to do with a foreach loop, but is there a PHP function or more elegant way to do this?

Answer 1

Both in_array() and array_search() work just fine for associative arrays.

See these examples:

php > $array = ['one' => 1, 'two' => 2, 'three' => 3];

php > var_dump(in_array(2, $array));
bool(true)

php > var_dump(in_array(5, $array));
bool(false)

php > var_dump(array_search(2, $array));
string(3) "two"

php > var_dump(array_search(5, $array));
bool(false)