Merge two arrays keeping original keys in PHP
Last Updated :
11 Nov, 2018
Problem: How to merge two arrays while keeping keys instead of reindexing in PHP?
Solution: This can be achieved in two ways which are by using + operator and by using inbuilt functions.
Method 1: Using + operator.
Example :
<?php
$array1 = array (
1 => 'Geeks' ,
2 => 'For' ,
3 => 'Geeks'
);
$array2 = array (
4 => 'A' ,
5 => 'Computer' ,
6 => 'Science' ,
7 => 'Portal' ,
8 => 'For' ,
9 => 'Geeks'
);
$merged_array = $array1 + $array2 ;
var_dump ( $merged_array );
?>
|
Output:
array(9) {
[1]=>
string(5) "Geeks"
[2]=>
string(3) "For"
[3]=>
string(5) "Geeks"
[4]=>
string(1) "A"
[5]=>
string(8) "Computer"
[6]=>
string(7) "Science"
[7]=>
string(6) "Portal"
[8]=>
string(3) "For"
[9]=>
string(5) "Geeks"
}
Method 2: Using inbuilt function array_replace() function.
Example :
<?php
$array1 = array (
1 => 'Geeks' ,
2 => 'For' ,
3 => 'Geeks'
);
$array2 = array (
4 => 'A' ,
5 => 'Computer' ,
6 => 'Science' ,
7 => 'Portal' ,
8 => 'For' ,
9 => 'Geeks'
);
$merged_array = array_replace( $array1 , $array2 );
var_dump ( $merged_array );
?>
|
Output:
array(9) {
[1]=>
string(5) "Geeks"
[2]=>
string(3) "For"
[3]=>
string(5) "Geeks"
[4]=>
string(1) "A"
[5]=>
string(8) "Computer"
[6]=>
string(7) "Science"
[7]=>
string(6) "Portal"
[8]=>
string(3) "For"
[9]=>
string(5) "Geeks"
}
Reference :http://php.net/manual/en/function.array-replace.php
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