Using the 'in' operator with multi dimensional arrays

[Vatec]

Hi all, I am working on an events system and want to use multi dimensional arrays but that standard "in" operator doesn't work like that, how else would I be able to check if the event name is correct?

PHP Code:

temp.array = {
    {
        "test", "30", "30"
    }, {
        "event", "30", "30"
    }
};
if (eventName in temp.array) {}