Is_uploaded_file()

What is the is_uploaded_file() Function?

The is_uploaded_file() function is a built-in PHP function that checks whether a specified file was uploaded via HTTP POST. This function returns true if the file was uploaded via HTTP POST, and false otherwise.

Here's the basic syntax of the is_uploaded_file() function:

is_uploaded_file(filename);

Where filename is the name of the file you want to check.

How to Use the is_uploaded_file() Function?

Using the is_uploaded_file() function is straightforward. Here are the steps to follow:

1. Specify the name of the file you want to check.
2. Call the is_uploaded_file() function, passing in the file name as a parameter.
3. Use the resulting boolean value to determine whether the file was uploaded via HTTP POST.

Here's an example code snippet that demonstrates how to use the is_uploaded_file() function:

<?php

$file = $_FILES['file']['tmp_name'];
if (is_uploaded_file($file)) {
    echo 'The file was uploaded via HTTP POST';
} else {
    echo 'The file was not uploaded via HTTP POST';
}

In this example, we use the is_uploaded_file() function to check whether the file specified in the $_FILES array was uploaded via HTTP POST. We then use a conditional statement to print out a message indicating whether the file was uploaded via HTTP POST or not.

Conclusion

The is_uploaded_file() function is a useful tool in PHP for checking whether a specified file was uploaded via HTTP POST. By following the steps outlined in this guide, you can easily use the is_uploaded_file() function in your PHP projects to check whether files were uploaded via HTTP POST. We hope this guide has been helpful.