How to delete elements of specified column in array in php

In PHP, you can use the array_splice() function to delete the elements of the specified column of the array. The syntax format is "array_splice(array,start,length)". You only need to specify the value of the parameter start as the position of the element, and the length of A value of "1" is sufficient.

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

In php, you can use array_splice The () function deletes the elements in the specified column of the array and returns an array composed of the deleted elements.

Example:

<?php
header("Content-type:text/html;charset=utf-8");
    $array = array(&#39;php中文网&#39;,&#39;http://www.php.cn&#39;,&#39;PHP教程&#39;,&#39;array_rand()函数&#39;);
    echo &#39;<pre class="brush:php;toolbar:false">&#39;;
    var_dump(array_splice($array,3,1));
	var_dump($array);
?>

Output:

##Description:

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

array_splice() The syntax is as follows:

array array_splice ( array, start [, length = 0 [, replacement ]] )

Parameter description:

array represents an array.
• start indicates the position (subscript) where deletion begins:
• If start is a positive number, delete from front to back.
  • If start is a negative number, start from the position -start from the end of arr and delete from back to front. For example -2 means start from the second to last element of the array.
length is an optional parameter, indicating the number of elements to be deleted:
• If length is a positive number, it means length elements are deleted;
  • If length is a negative number, all elements starting from start and counting down to length from the end of the array will be deleted;
  • If it is omitted, all elements starting from start and ending at the end of the array will be deleted.
replacement is an optional parameter indicating the value to be replaced. If replacement has multiple values, it needs to be set to an array. If there is only one value, it does not need to be set to an array.

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

Note that using replacement to replace array elements will not retain the original key names.

Return value: Returns an array consisting of the deleted elements.

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