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This article mainly introduces how php deletes array elements in batches, which has a certain reference value, and interested friends can refer to it. I hope you will gain a lot after reading this article.

In php, you can use the array_splice () function to delete array elements in batches, which removes a specified number of elements starting at a specified location in the array, with the syntax "array_splice ($array,$start,$length)".

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

The PHP array_splice () function is used to delete some elements of the array; you can delete it directly or replace it with other values.

The syntax of array_splice () is as follows:

Array_splice ($array,$start,$length,$replacement)

Parameter description:

Array represents an array.

Start indicates where to start the deletion (subscript):

If start is positive, it is deleted from after going.

If the start is negative, it is deleted from back to front, starting from the end of the arr-start. For example,-2 means starting with the penultimate element of the array.

Length is an optional parameter that indicates the number of elements deleted:

If length is positive, it means deleting length elements

If length is negative, all elements from start to the reciprocal length at the end of the array will be deleted

If omitted, all elements from start to the end of the array are deleted.

Replacement is an optional parameter that represents the value to replace. If replacement has more than one value, it needs to be set to an array, and if there is only one value, it can not be set to an array.

If the result of the combination of start and length is that no elements are deleted, then the value contained in replacement will be inserted at the location specified by start.

Note that replacing array elements with replacement does not retain the original key name.

Return value: returns an array of deleted elements.

Example:

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