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This article mainly introduces the relevant knowledge of how php removes an element in the array, the content is detailed and easy to understand, the operation is simple and fast, and has a certain reference value. I believe you will gain something after reading this article on how to remove an element in the array by php. Let's take a look at it.

Removal method: 1, use array_shift (), you can remove the first element at the beginning of the array; 2, use array_pop (), you can remove the last element of the array; 3, use unset (), you can remove an element according to the array subscript, syntax "unset ($arr [specify subscript])".

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Php removes an element from the array

1. Use array_shift ()

Array_shift ($arr) removes the first element at the beginning of the arr array and returns it as a result. The length of the arr array is reduced by 1 and all other elements are moved forward one bit. All numeric key names will be counted from 0, and string key names will remain the same.

Return value: returns the value of the element removed from the array, or NULL if the array is empty.

2. Use the array_pop () function

Array_pop ($arr) deletes the element at the end (last) of the arr array and subtracts the length of the arr array by 1.

Return value: returns the value of the element deleted from the array. If arr is empty or is not an array, NULL is returned.

3. Use the unset () function

The unset () function allows you to cancel elements from an array, but the array does not rebuild the index, that is, it maintains the original index, because the index in php has a special meaning.

Example: delete an element with subscript 2

This is the end of the article on "how php removes an element from an array". Thank you for reading! I believe you all have a certain understanding of "how to remove an element from the array by php". If you want to learn more, you are welcome to follow the industry information channel.

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