In PHP, what are some common reasons for receiving a "File not found" error when trying to access a specific file?

The most common reasons for receiving a "File not found" error in PHP when trying to access a specific file include incorrect file path, file permissions, or the file not actually existing in the specified location. To solve this issue, double-check the file path to ensure it is correct, verify that the file exists in the specified location, and check the file permissions to ensure that the PHP script has the necessary permissions to access the file.

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

if (file_exists($file_path)) {
    // File exists, proceed with accessing the file
    $file_contents = file_get_contents($file_path);
    echo $file_contents;
} else {
    // File not found, display an error message
    echo "File not found.";
}