In this post, we will show you difference between array_merge() and array_combine() functions in PHP

1. Code:

<?php
  
$array1 = array("subject1" ,"subject2");
$array2 = array( "c/c++", "java");
  
echo"Combine two arrays:"; 
$final = array_combine($array1, $array2);
print_r($final);

echo"<br>"."Display merged arrays:";
$final = array_merge($array1, $array2);
print_r($final);
?>

2. Example:

Input:

$array1 = array("subject1" ,"subject2");
$array2 = array( "c/c++", "java");

Output:

Combine two arrays:
Array ( [subject1] => c/c++ [subject2] => java )
Display merged arrays:
Array ( [0] => subject1 [1] => subject2 [2] => c/c++ [3] => java ) 

3. Difference:

array_merge() Function	array_combine() Function
This function merges the two or more arrays.	This array combine only two arrays.
This function merges  the arrays such that all the arrays have keys and values.	This function combine the one array containing keys and another array containing values.
The arrays are appended at the end of the first array.	The arrays are combined.