What are best practices for handling JPG files during transmission to prevent incomplete transfers?

When transmitting JPG files, it is important to ensure that the transfer is completed successfully to prevent corruption or incomplete transfers. One way to achieve this is by using checksums to verify the integrity of the file after transmission. By comparing the checksum of the transmitted file with the original checksum, you can ensure that the file was transferred correctly.

// Calculate checksum of the original JPG file
$original_checksum = md5_file('original.jpg');

// Transmit the JPG file to another location

// Calculate checksum of the transmitted JPG file
$transmitted_checksum = md5_file('transmitted.jpg');

// Compare checksums to verify the integrity of the file
if($original_checksum === $transmitted_checksum) {
    echo 'File transfer successful!';
} else {
    echo 'File transfer failed!';
}