What potential issue could arise when trying to save data to a TXT file using PHP, as seen in the provided code snippet?

The potential issue that could arise when trying to save data to a TXT file using PHP is the lack of proper file permissions. If the file does not have the necessary write permissions, PHP will not be able to save data to it. To solve this issue, you can set the correct file permissions before attempting to write to the file. 

// Set the file permissions before writing to the file
$file = 'data.txt';
if (is_writable($file)) {
    $data = "Hello, World!";
    file_put_contents($file, $data);
    echo "Data saved to file successfully.";
} else {
    echo "Cannot write to file. Please check file permissions.";
}

Keywords

file permissions fopen fwrite file_put_contents error handling

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