PHP Add new once element in array and remove last once -


i want keep 3 element in array. so, want if new element added in array oldest element remove array , re-index array. best , fast way make it?

this first array

$foo = array(      'when', // [0]     'whom', // [1]     'what' // [2]  );

if new element "how" added, want modify below.

$foo = array(      'how', // [0]     'what', // [1]     'whom' // [2]  );

php has many built in array functions including array_unshift allows add element beginning , array_pop allows remove element end:

array_unshift($foo, 'how'); // add beginning array_pop($foo); // remove end

example: https://eval.in/859692


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