How should the implode function be used in PHP when dealing with arrays and strings, as highlighted in the forum thread?

To use the implode function in PHP when dealing with arrays and strings, you need to pass the array as the first parameter and the string that will be used to concatenate the array elements as the second parameter. This will result in a string where the array elements are concatenated together with the specified string separator.

// Example of using implode function with arrays and strings
$array = array("apple", "banana", "orange");
$separator = ", ";
$string = implode($separator, $array);
echo $string; // Output: apple, banana, orange