int array_unshift(array array, mixed var, [...]);
array_unshift() prepends passed elements to the front of the array. Note that the list of elements is prepended as a whole, so that the prepended elements stay in the same order.
Returns the new number of elements in the array.
Example 1. array_unshift() example $queue = array("p1", "p3");
array_unshift($queue, "p4", "p5", "p6");
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See also array_shift(), array_push(), and array_pop().
Note: This function was added in PHP 4.0.