How can the undefined variable error be addressed when fetching files via tftp in PHP?

When fetching files via tftp in PHP, the undefined variable error can be addressed by checking if the variable is set before using it in the code. This can be done using the isset() function to determine if the variable has been set or not. By ensuring that the variable is set before using it, the undefined variable error can be avoided. 

$filename = 'example.txt';

if(isset($filename)){
    // code to fetch file via tftp
    // use $filename variable here
} else {
    echo "Error: Filename is not set.";
}

Keywords

undefined variable tftp PHP error fetching files

Related Questions