Detailed explanation of array_push(), array_pop() and array_shift() function usage examples in php

What are the respective usages of php array functions array_push(), array_pop() and array_shift()?

phparray_push functionadds one or more elements (push) to the end of the array of the first parameter, and then returns the length of the new array.array_pop() functionDeletes the last element in the array.array_shift() functionDeletes the

th element in the array and returns the value of the deleted element. This article will introduce these three functions to you respectively, hoping to help you learn array functions.

array_push function

array_push() function adds one or more elements (push) to the end of the array of the first parameter, and then returns the length of the new array. array_push() will issue a warning if the first argument is not an array.

Example 1

Use the array_push() function to insert new elements to the end of the array. The code is as follows

Code output result:

array_pop() function

array_pop() function deletes the last element in the array. If the array is empty, or not an array, NULL will be returned.

Example 2

Use the array_pop() function to delete the last element in the array, the code is as follows

Code output result:

array_shift() function

array_shift() function deletes the first element in the array and returns the value of the deleted element. Returns NULL if the array is empty.

Example 3

array_shift() function deletes the first element (red) in the array and returns the value of the deleted element. The code is as follows

"red","b"=>"green","c"=>"blue"); echo array_shift($a)."
"; print_r ($a); ?>

Code output result:

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