What is “:” in PHP? [closed]

Answer 1

You also encounter : if you use the alternative syntax for control structures:

Or as already mentioned the ternary operator:

$action = (empty($_POST['action'])) ? 'default' : $_POST['action'];

(Examples taken from the documentation)

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Edit: Somehow I didn't see that the alternative syntax was already mentioned, must be too tired ;) Anyway, I will leave it as it is, as I think an actual example and a link to the documentation is more helpful than just plain text.