How can PHP developers ensure proper handling of file handles and pointers to avoid issues like Resource id#2?

To avoid issues like "Resource id#2" in PHP, developers should always properly close file handles after using them to prevent resource leaks. This can be done by explicitly calling the fclose() function on the file handle. Additionally, developers should check for errors when opening files and handle them appropriately to prevent unexpected behavior.

$file = fopen("example.txt", "r");

if ($file) {
    // File operations here
    fclose($file);
} else {
    echo "Error opening file.";
}