“Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP

Question

I\'m running a PHP script and continue to receive errors like:

Notice: Undefined variable: my_variable_name in C:\\wamp\\www\\mypath\\index.php on line 10

Answer 1

When dealing with files, a proper enctype and a POST method are required, which will trigger an undefined index notice if either are not included in the form.

The manual states the following basic syntax:

HTML

    
    
    
    Send this file: 
    

PHP

';
if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
    echo "File is valid, and was successfully uploaded.\n";
} else {
    echo "Possible file upload attack!\n";
}

echo 'Here is some more debugging info:';
print_r($_FILES);

print "

"; ?>

Reference:

• http://php.net/manual/en/features.file-upload.post-method.php