In PHP, you can use the array_splice() function to add elements to the middle of the array. You only need to set the second parameter of the function to a value greater than 0 and less than "array length -1". Syntax "array_splice(array, index position to be inserted, 0, element value)".
The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
php is in the middle of the array Add elements
In PHP, you can use the array_splice() function to add elements in the middle of the array.
array_splice($array,$start,$length,$value)The function can insert new elements into any position of the array.
When $length=0, then the parameter $start can specify the position (subscript) to start inserting, and the parameter $value can specify the insertion value (if there are multiple values, it needs to be set as an array).
Example:
<?php
header("Content-type:text/html;charset=utf-8");
$arr1=array(10,12,20);
array_splice($arr1,0,0,"1");
var_dump($arr1);
$arr1=array(10,12,20);
array_splice($arr1,1,0,"1");
var_dump($arr1);
$arr2=array(10,12,20);
array_splice($arr2,2,0,array("1",25,"3"));
var_dump($arr2);
?>
It can be seen that when the value of parameter $start is greater than 0 and less than "array length-1", it can be in the middle of the array Add elements.
Recommended learning: "PHP Video Tutorial"
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