How can the is_uploaded_file function be used to check if a file has been uploaded in PHP?

The is_uploaded_file function in PHP can be used to check if a file has been uploaded through a form. This function takes the file path as a parameter and returns true if the file was uploaded via HTTP POST, false otherwise. By using this function, you can verify if a file has been successfully uploaded before processing it further in your PHP script. 

if (isset($_FILES['file']['tmp_name']) && is_uploaded_file($_FILES['file']['tmp_name'])) {
    // File has been uploaded
    // Process the file further
} else {
    // File was not uploaded
    // Handle the error or display a message to the user
}

Keywords

is_uploaded_file function file upload PHP validation

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