What potential issue might arise when using the 'unlink' function in PHP to delete files in a loop?

When using the 'unlink' function in a loop to delete files, a potential issue that may arise is that the function might fail to delete a file due to permission restrictions or file locks. To solve this issue, you can check if the file exists before attempting to delete it using the 'file_exists' function. 

$files = ['file1.txt', 'file2.txt', 'file3.txt'];

foreach ($files as $file) {
    if (file_exists($file)) {
        unlink($file);
        echo "File $file deleted successfully.\n";
    } else {
        echo "File $file does not exist.\n";
    }
}

Keywords

unlink PHP loop file deletion race condition

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