Php inserts the element function array_unshift () at the beginning of the array

Let's not talk about the instance first.

#1 array_unshift () example

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<? Php $ Queue = array ("orange", "banana"); // defines an array Array_unshift ($ queue, "apple", "raspberry"); // Insert an element to the array Print_r ($ queue ); ?>

Output result

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Array ( [0] => apple [1] => raspberry [2] => orange [3] => banana )

Very simple. Let's look at the array_unshift () description.

The array_unshift () function inserts one or more elements at the beginning of the array.

The added elements are added as a whole. The order of these elements in the array is the same as that in the parameter.

This function returns the number of elements in the array.

 

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Array_unshift (array, value1, value2, value3 ...)

A very simple function of the instance.