What are common issues encountered when trying to create a file using fopen in PHP?

Common issues encountered when using fopen in PHP include incorrect file paths, insufficient permissions to create files, and file already exists errors. To solve these issues, ensure that the file path is correct, check and adjust file permissions if needed, and handle file existence scenarios appropriately.

$filename = "example.txt";
$handle = fopen($filename, "w");

if ($handle === false) {
    die("Unable to create file.");
}

fclose($handle);