PHP file_exists Function Guide

The file_exists function is a filesystem function in PHP used to check if a file or directory exists at a specified path. Its purpose is to determine whether a file or directory exists, returning true if it does and false if it doesn’t.

$file = 'path/to/your/file.txt';

if (file_exists($file)) {
    echo "File exists.";
} else {
    echo "File does not exist.";
}

In the above example, the file_exists function is used to check if a file exists at the specified path and then output a corresponding message based on the result.