Home>Article>Backend Development> How to merge and replace array elements in php
Implementation steps: 1. Use the array_merge() function to merge two, the syntax "array_merge(array 1, array 2....)" will return a merged array containing two array elements; 2. Use the array_splice() function to replace the elements in the merged array. The syntax "array_splice(merged array, starting position, number, replacement value)" can replace the specified number of elements starting from the specified position. If multiple values are replaced, replace Values can be arrays.
The operating environment of this tutorial: windows7 system, PHP8.1 version, DELL G3 computer
php merge and replace array elements can be divided into Two steps:
Merge two arrays
Replace the merged array
Implementation steps:
Step 1. Use the array_merge() function to merge two arrays
array_merge() function is used to merge one or more arrays into one array , will return a merged array containing two array elements
Note: If two or more array elements have the same key name, the last element will overwrite the other elements.
Step 2: Use array_splice() function to replace the merged array
array_splice() function to remove from the array Selected element and replace it with new element.
array_splice() function will change the original array
Description:
array_splice() function is used Deletes part of an element from an array; you can delete it directly or replace it with another value.
array_splice() syntax is as follows:
array array_splice ( array &$arr, int $start [, int $length = 0 [, mixed $replacement ]] )
Parameter description:
If the combination of start and length results in no element being 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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