How to implement array value replacement in php

In PHP, you can use the "array_replace" function to realize array value replacement. The syntax of this function is "array_replace(array1,array2,array3...)", so that the values ​​of the following arrays replace the values ​​of the first array. value.

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array_replace() function uses the value of the following array to replace the first one The value of the array.

Tip: You can pass an array, or multiple arrays, to the function.

If a key exists in the first array array1 and also exists in the second array array2, the value in the first array array1 will be replaced by the value in the second array array2. If a key only exists in the first array array1, it will remain unchanged. (See Example 1 below for details)

If a key exists in the second array array2, but does not exist in the first array array1, the element will be created in the first array array1. (See Example 2 below for details)

If multiple replacement arrays are passed, they will be processed in order, and the values ​​of the subsequent arrays will overwrite the values ​​of the previous arrays. (See Example 3 below for details)

Tip: Please use array_replace_recursive() to recursively replace the value of the first array with the value of the subsequent array.

Syntax

array_replace(array1,array2,array3...)

Parameters

array1 Required. Specifies an array.

array2 Optional. Specifies the array to replace the values ​​of array1.

array3,... Optional. Specifies multiple arrays of values ​​to replace array1 and array2, .... The values ​​in the following array will overwrite the values ​​in the previous array.

Technical details

Return value: Returns the replaced array, or NULL if an error occurs.

PHP version: 5.3.0

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