What does array_search actually return if a value is not found?

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According to online manual etc., I have tried testing it against both =
false, and -1 using operators like == !=3D ===3D etc., but for =
whatever reason I can't seem to manage to compare/test it's return value =
successfully to determine whether or not a value actually exists in an =
array, and get returned the relevant index/key.

TIA

Jacob Kruger
Blind Biker
Skype: BlindZA
'...fate had broken his body, but not his spirit...'

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