The array_merge() function is an inbuilt function in PHP that is used to merge two or more arrays into a single array. This function merges the elements or values of two or more arrays together to make a single array.
The merging occurs in such a manner that the values of one array are appended at the end of the previous array. The function takes the list of arrays separated by commas as a parameter that is needed to be merged and returns a new array with merged values of arrays passed in the parameter.
Syntax:
array array_merge(array ...$arrays)
Parameters: This parameter holds the array list that needs to merge to make a single array.
Return Value: This function returns the merged array and returns empty array id parameter array is not given.
Note: In the 7.4.0 version, this function can work without parameters but formerly, at least one parameter is required for this function.
Example 1:
PHP
<?php $arr1 = array(5, 10, 15, 20); $arr2 = array(11, 12, 13, 14); $arr = array_merge($arr1, $arr2); var_dump($arr); ?> |
Output:
array(8) {
[0] => int(5)
[1] => int(10)
[2] => int(15)
[3] => int(20)
[4] => int(11)
[5] => int(12)
[6] => int(13)
[7] => int(14)
}
Example 2:
PHP
<?php $arr1 = array( 'Geeks' => "HTML", 'GFG' => "CSS", 'Geek' => "JavaScript", 'G4G' => "PHP"); $arr2 = array( 'Geeks' => "CPP", 'G4G' => "Java", 'Geek' => "Python", 'neveropen' => "DSA"); $arr = array_merge($arr1, $arr2); var_dump($arr); ?> |
Output:
array(5) {
["Geeks"] => string(3) "CPP"
["GFG"] => string(3) "CSS"
["Geek"] => string(6) "Python"
["G4G"] => string(4) "Java"
["neveropen"] => string(3) "DSA"
}
Reference: https://www.php.net/manual/en/function.array-merge.php
