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Associative array or hash maps are listings of key and value pairs with a posibility to nest additional keys and values. An associative array is a very powerful construct within PHP.

In our previous article we discussed simple arrays, which in their turn are indexed associative arrays under the hood. Take the following example:

$array = [

But associative arrays can be so much more than just an indexed array, and you will find many database operations returning arrays where the fields of a table are the keys in the array while their values are also the values within the array.

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