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3 methods: 1. Use the array_splice() function to replace 1 element starting from the specified position, the syntax is "array_splice(array, starting position, 1, replacement value)"; 2. Use array_replace() The function will replace the value of the first array with the value of the following array. The syntax is "array_replace(array, replace array)". You only need to replace a value contained in the array; 3. Reassign the value of the element with the specified subscript. The syntax is " $array name[subscript]="replacement value"".
The operating environment of this tutorial: Windows 7 system, PHP version 8.1, DELL G3 computer
php uses a value 3 ways to replace array elements
Method 1: Using the array_splice() function
array_splice() is a powerful function that can be implemented Delete, insert, and replace element operations.
array_splice($array,$start,$length,$replacement)
Parameters:
If a replacement operation is performed, the length value and the number of replacements need to be consistent.
Note that using replacement to replace array elements will not retain the original key names.
<?php header('content-type:text/html;charset=utf-8'); $arr=array(1,2,3,4,5); var_dump($arr); array_splice($arr,1,1,"H"); var_dump($arr); ?>
Method 2: Use array_replace() function
array_replace() function uses the value of the following array to replace the first array value.
array_replace(数组,替换数组)
You only need to replace one value contained in the array, and the first element of the array will be replaced
<?php $a1=array(1,2,3,4,5); var_dump($a1); $a2=array("blue"); var_dump(array_replace($a1,$a2)); ?>
Method 3 : Reassign the value to the element with the specified subscript
<?php $arr=array(1,2,3,4,5); var_dump($arr); $arr[3]="hello"; var_dump($arr); ?>
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