Help with key() please...

[NYSiRacer]

I have read the manual, but didn't understand it... could someone explain it with examples to me please?

Thanks

[tomhath]

Php keeps track of a couple of several things related to an array; including how many elements are in it, and which element in the array is "current".

You can index an array by position :
x[1] = 42;

Or you can use a string as the index:
x["Fred"] = 42;

Or you can tell php to just use the next available element:
x[] = 42;

You can get the index and value of whatever array element is "current" with key(x) and current(x). The key() function is usually used with a "foreach" loop when you want to step through every array element, but you used strings (as in the second example above) so a normal "for" loop (on numbers) won't work.

[NYSiRacer]

This is what I'm trying to do:
$q = $_GET['q'];
$data = array('one','two','three');

say, http://localhost/?q=two

if (in_array($q,$data)) {
// how do I use key() to echo out the internal index number here? Which in this case, the number should be 1 //
}

Thanks

[driverdave]

You don't want to use key. You want to array_search

[NYSiRacer]

Thanks 🙂