What is the best practice for converting HEX data to a format that can be saved as a JPEG file in PHP?
When converting HEX data to a format that can be saved as a JPEG file in PHP, the best practice is to first decode the HEX data into binary format using `hex2bin()`, and then save the binary data as a JPEG file using `file_put_contents()`.
// HEX data to be converted to JPEG
$hexData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
// Output JPEG file
$jpegFile = 'output.jpg';
// Convert HEX data to binary
$binaryData = hex2bin($hexData);
// Save binary data as JPEG file
file_put_contents($jpegFile, $binaryData);