How to delete array elements in php and rearrange key values

Method: 1. Use the array_splice() function to delete the specified number of elements starting from the specified position in the array. The syntax is "array_splice($arr, position, format)"; 2. After deleting the array elements, use sort( ) or rsort() function sorts array elements in ascending or descending order.

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

In PHP, you can delete array elements Use the array_splice() function. The array_splice() function removes a selected element from an array and replaces it with a new element. The function will also return an array of removed elements.

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(10,12,20,25,24);
echo "原数组：";
var_dump($arr);

echo "删除后的数组：" ;
array_splice($arr,1,2);
var_dump($arr);
?>

Output result:

#After deleting the array elements, you can use the sort() or rsort() function to sort the array elements in ascending or descending order Sort.

echo "升序排序：" ;
sort($arr);
var_dump($arr);

echo "降序排序：" ;
rsort($arr);
var_dump($arr);

Output results:

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