How to use array_merge() and array_combine() in PHP ?
In this article, we will discuss about how to use array_merge() and array_combine() functions in PHP. Both functions are array based functions used to combine two or more arrays using PHP. We will see each function with syntax and implementation
array_merge() Function: This function merges the two or more arrays such that all the arrays have keys and values. The arrays are appended at the end of the first array.
Syntax:
array_merge( array1, array2, ..., array n )
Parameters: Arrays are the input arrays to be merged.
Return type: Single array with merged elements.
Example: PHP example to merge two arrays.
PHP
<?php
$array1 = array (
"subject1" => "Python" ,
"subject2" => "sql"
);
$array2 = array (
"subject3" => "c/c++" ,
"subject4" => "java"
);
$final = array_merge ( $array1 , $array2 );
print_r( $final );
?>
|
Output
Array
(
[subject1] => Python
[subject2] => sql
[subject3] => c/c++
[subject4] => java
)
Example 2: Merge multiple arrays.
PHP
<?php
$array1 = array (
"subject1" => "Python" ,
"subject2" => "sql"
);
$array2 = array (
"subject3" => "c/c++" ,
"subject4" => "java"
);
$array3 = array (
"subject5" => "CN" ,
"subject6" => "OS"
);
$array4 = array (
"subject7" => "data mining" ,
"subject8" => "C#"
);
$final = array_merge ( $array1 ,
$array2 , $array3 , $array4 );
print_r( $final );
?>
|
Output
Array
(
[subject1] => Python
[subject2] => sql
[subject3] => c/c++
[subject4] => java
[subject5] => CN
[subject6] => OS
[subject7] => data mining
[subject8] => C#
)
array_combine() Function: This function combine only two arrays with one array containing keys and another array containing values.
Syntax:
array_combine(array1, array2)
Parameters:
- array1 is the first array with keys.
- array2 is the second array with values.
Return Value: It returns the combined array.
Example: PHP program to combine arrays.
PHP
<?php
$array1 = array ( "subject1" , "subject2" );
$array2 = array ( "c/c++" , "java" );
$final = array_combine ( $array1 , $array2 );
print_r( $final );
?>
|
Output
Array
(
[subject1] => c/c++
[subject2] => java
)
Example 2:
PHP
<?php
$array1 = array ( "subject1" ,
"subject2" , "subject3" , "subject4" );
$array2 = array ( "c/c++" , "java" , "Python" , "HTML" );
$final = array_combine ( $array1 , $array2 );
print_r( $final );
?>
|
Output
Array
(
[subject1] => c/c++
[subject2] => java
[subject3] => Python
[subject4] => HTML
)
Last Updated :
07 Oct, 2021
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