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 // Define array1 with keys and values $array1 = array( "subject1" => "Python", "subject2" => "sql"); // Define array2 with keys and values $array2 = array( "subject3" => "c/c++", "subject4" => "java"); // Merge both array1 and array2 $final = array_merge($array1, $array2); // Display merged array print_r($final); ?> |
Array
(
[subject1] => Python
[subject2] => sql
[subject3] => c/c++
[subject4] => java
)
Example 2: Merge multiple arrays.
PHP
<?php // Define array1 with keys and values $array1 = array( "subject1" => "Python", "subject2" => "sql"); // Define array2 with keys and values $array2 = array( "subject3" => "c/c++", "subject4" => "java"); // Define array3 with keys and values $array3 = array( "subject5" => "CN", "subject6" => "OS"); // Define array4 with keys and values $array4 = array( "subject7" => "data mining", "subject8" => "C#"); // Merge all arrays $final = array_merge($array1, $array2, $array3, $array4); // Display merged array print_r($final); ?> |
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 // Define array1 with keys $array1 = array("subject1" ,"subject2"); // Define array2 with values $array2 = array( "c/c++", "java"); // Combine two arrays $final = array_combine($array1, $array2); // Display merged array print_r($final); ?> |
Array
(
[subject1] => c/c++
[subject2] => java
)
Example 2:
PHP
<?php // Define array1 with keys $array1 = array("subject1", "subject2", "subject3", "subject4"); // Define array2 with values $array2 = array( "c/c++", "java", "Python", "HTML"); // Combine two arrays $final = array_combine($array1, $array2); // Display merged array print_r($final); ?> |
Array
(
[subject1] => c/c++
[subject2] => java
[subject3] => Python
[subject4] => HTML
)
