How to create comma separated list from an array in PHP ?

The comma separated list can be created by using implode() function. The implode() is a builtin function in PHP and is used to join the elements of an array. implode() is an alias for PHP | join() function and works exactly same as that of join() function.
If we have an array of elements, we can use the implode() function to join them all to form one string. We basically join array elements with a string. Just like join() function , implode() function also returns a string formed from the elements of an array.

Syntax:

string implode( separator, array )

Return Type: The return type of implode() function is string. It will return the joined string formed from the elements of array.

Example 1: This example adds comma separator to the array elements.

<?php

// Declare an array and initialize it
$Array = array( "GFG1", "GFG2", "GFG3" );

// Display the array elements
print_r($Array);

// Use implode() function to join
// comma in the array
$List = implode(', ', $Array);

// Display the comma separated list
print_r($List);

?>

Output:

Array
(
    [0] => GFG1
    [1] => GFG2
    [2] => GFG3
)
GFG1, GFG2, GFG3

Example 2:

<?php

// Declare an array and initialize it
$Array = array(0, 1, 2, 3, 4, 5, 6, 7);

// Display the array elements
print_r($Array);

// Use implode() function to join
// comma in the array
$List = implode(', ', $Array);

// Display the comma separated list
print_r($List);

?>

Output:

Array
(
    [0] => 0
    [1] => 1
    [2] => 2
    [3] => 3
    [4] => 4
    [5] => 5
    [6] => 6
    [7] => 7
)
0, 1, 2, 3, 4, 5, 6, 7

PHP is a server-side scripting language designed specifically for web development. You can learn PHP from the ground up by following this PHP Tutorial and PHP Examples.