#PHP ARRAY MERGE HOW TO#

If, however, there were duplicate associative values in the arrays, the last value will overwrite any previous values: $array1 = [ Numerical keys have been re-indexed, and string (associative) indexes ( building, sky) remain unmodified. This will result in the merged array being output: Array The below example will merge three arrays, with some values keyed with strings instead of numbers (associative arrays): $array1 = [ Note that the print_r command is used to print the array вЂ“ this command prints the array recursively, including the value of the array and the values stored in it, along with their index. This will result in the following output: ArrayДЄs you can see, the arrays have been merged in the order they were supplied. If associative arrays are being merged, the value in the last array passed as a parameter will overwrite the value in any previous arrays being merged if they use the same keyД®xamples Merging arrays with array_merge:Д«elow, two arrays are defined and then merged: $array1 =.Arrays will be re-indexed when merged! If your array uses numeric keys, they will be changed as each item in the result array will now have a new position.The arrays will be merged in the order they are supplied to array_merge.There is no limit to the number of arrays that can be passed.

If no arrays are supplied, an empty array will be returned.If only one array is supplied, it will be returned as-is.array_merge will return an array containing the contents of the arrays passed to it merged into a single array.HereвЂ™s the syntax for the array_mergeВ function in PHP: ?array_merge($array1, $array2. PHP has a built-in function called array_merge,В which does just this. Merging/Combining ArraysД«eing able to merge arrays is useful functionality. What is an Array?ДЄn array is a type of PHP variable that can hold other values, or references to other variables, in a list at a certain position.ДЄrrays are really useful вЂ“ allowing you to store a list of variables or values of any length in a single variable вЂ“ ready to be iterated over, printed as the rows in a table, or otherwise processed.ДЄrrays might contain a list of students in a class, which can be managed by adding or removing students, or they might contain a list of enemies to be shown on-screen in a video game вЂ“ ready to be removed from the array as they are defeated.ДЄrrays form the backbone of pretty much every application you might write in PHP or any other programming language.

#PHP ARRAY MERGE HOW TO#

This article will explain how to merge arrays using the PHP array_mergeВ function and provide some code examples.

Php array merge