Are there alternative PHP libraries or tools that support FNC3 characters in barcodes?

FNC3 characters are special characters used in barcodes to encode specific information. If your current PHP library or tool does not support FNC3 characters, you can look for alternative libraries that do support them. One popular option is the TCPDF library, which has built-in support for FNC3 characters in barcode generation.

// Example code using TCPDF library to generate a barcode with FNC3 characters
require_once('tcpdf_include.php');

$pdf = new TCPDF('L', 'mm', 'A4', true, 'UTF-8', false);

$pdf->SetCreator(PDF_CREATOR);
$pdf->SetAuthor('Author');
$pdf->SetTitle('Title');

$pdf->SetMargins(10, 10, 10);
$pdf->SetAutoPageBreak(true, 10);

$pdf->AddPage();

$barcodeobj = new TCPDFBarcode('123456', 'C128', '', '', '', 18, 0.4);
$pdf->write1DBarcode('123456' . chr(29) . '7890', 'C128', '', '', '', 18, 0.4, $barcodeobj, 'N');

$pdf->Output('barcode.pdf', 'I');