Can't search an array in PHP in_array for the presence of multiple needles

When giving PHP in_array an array of values I want to search for, it does not work. Although the documentation specifies that you can give a mixed needle.

So basically I want to test for the presence of multiple terms a开发者_JS百科s the value of an array - is there a reason this is not working, and can anyone suggest another way of doing this?

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For something like searching an array $haystack for multiple $needles that are all strings or numbers, you can use array_intersect($array1, $array2, ...)

http://php.net/manual/en/function.array-intersect.php

It should work for mixed types also.

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When the documentation says mixed it means it can accept multiple types, e.g. int, float, string. Though the docs should say exactly which types are valid.

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mixed doesn't mean more than one needle, it refers to types. It's documentation talk for more than one possible type.