PHP Array Exercises : Merge two commas separated lists with unique value only

Last update on May 30 2025 13:14:33 (UTC/GMT +8 hours)

43. Merge Two Comma-Separated Lists with Unique Values

Write a PHP script to merge two commas separated lists with unique value only.

Sample Solution:

PHP Code:

<?php
// Define two comma-separated lists as strings
$list1 = "4, 5, 6, 7";
$list2 = "4, 5, 7, 8";

// Combine both lists with unique values only
// Explode the strings into arrays, merge them, remove duplicates, and implode back into a string
$result = implode("," , array_unique(array_merge(explode(",",$list1),explode(",", $list2))));

// Display the result
echo $result."\n";
?>

Output:

4, 5, 6, 7, 8

Flowchart:

PHP Code Editor:

For more Practice: Solve these Related Problems:

Write a PHP script to take two comma-separated strings, merge them, and output a list of unique values separated by commas.
Write a PHP function to parse two CSV strings, combine their elements, remove duplicates, and join them back to a string.
Write a PHP program to merge two lists provided as strings and then use array_unique() to filter the merged values.
Write a PHP script to concatenate two comma-separated lists, split them into an array, remove duplicate entries, and display the result.

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