Are there any potential issues with the way the file is being opened and written to in the PHP code?

The potential issue with the current code is that the file is being opened in write mode ('w'), which will overwrite the existing content of the file each time the script is run. To avoid losing data, it's recommended to open the file in append mode ('a') instead. This will allow new data to be added to the end of the file without affecting the existing content. 

$file = 'data.txt';
$data = "New data to be added to the file\n";

$fileHandle = fopen($file, 'a');
fwrite($fileHandle, $data);
fclose($fileHandle);

Keywords

file handling fopen fwrite error handling permissions

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