What are the historical reasons behind the differences in file extensions like .jpg and .jpeg in PHP?

The historical reason behind the differences in file extensions like .jpg and .jpeg in PHP is due to the limitations of older operating systems that only supported three-character file extensions. As a result, some file formats, like JPEG, had to be truncated to fit this limitation. To handle both .jpg and .jpeg extensions in PHP, you can use a simple function to check for either extension when processing files. 

// Function to handle both .jpg and .jpeg file extensions
function handleJPEGFiles($filename) {
    $extension = pathinfo($filename, PATHINFO_EXTENSION);
    if ($extension == 'jpg' || $extension == 'jpeg') {
        // Process the file
        echo "Processing JPEG file: $filename";
    } else {
        // Handle other file types
        echo "Unsupported file format: $filename";
    }
}

// Example usage
handleJPEGFiles('image.jpg');
handleJPEGFiles('photo.jpeg');

Keywords

file extensions .jpg .jpeg historical reasons PHP

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