What is the potential issue with the code that results in an "Array to String conversion" notice?

The potential issue with the code that results in an "Array to String conversion" notice is when trying to concatenate an array with a string using the concatenation operator (.) in PHP. To solve this issue, you need to ensure that you are only trying to concatenate strings together, and not arrays. You can use functions like implode() to convert an array to a string before concatenating it.

// Incorrect code that results in "Array to String conversion" notice
$array = [1, 2, 3];
$string = "The array values are: " . $array;

// Corrected code to avoid "Array to String conversion" notice
$array = [1, 2, 3];
$string = "The array values are: " . implode(", ", $array);
echo $string;