QR code generator

Chars used 0

Current practice: URL-encode user text before placing it in a query string, cap the input length, and escape any text that is written back into HTML.

Generating the QR request safely

The QR image endpoint can stay the same. The browser only needs to encode the text before building the image and download URLs.

<script>
const text = document.getElementById('t1').value.slice(0, 200);
const encoded = encodeURIComponent(text);
document.getElementById('display').innerHTML =
  `<img src="qr_generate.php?str=${encoded}" alt="Generated QR code">`;
</script>

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A Quick Response Code ( QR Code ) is a machine-readable optical label that contains information about the item to which it is attached. Usually it is an ID or a link or some text which connects to more details.
The data is readable by a scaner. Smart phones can be used as scaner also.

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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QR Code generator

Generating the QR request safely

Subhendu Mohapatra