What are common reasons for receiving fread() and fclose() warnings when sending a form without an attachment in PHP?

Common reasons for receiving fread() and fclose() warnings when sending a form without an attachment in PHP could be due to the code attempting to read or close a file that does not exist or is not properly handled when no file is uploaded. To solve this issue, you can check if a file was uploaded before attempting to read or close it. 

if(isset($_FILES['file']) && $_FILES['file']['error'] === UPLOAD_ERR_OK) {
    $file = $_FILES['file']['tmp_name'];
    
    $handle = fopen($file, 'r');
    $contents = fread($handle, filesize($file));
    
    // Process file contents
    
    fclose($handle);
} else {
    // Handle case where no file was uploaded
}

Keywords

fread fclose warnings form attachment

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