问题:

http://sourceforge.net/projects/phpqrcode/, is a great library but i can't find how to return the png image as a string, the basic examples are

QRcode::png('code data text', 'filename.png'); // creates file  QRcode::png('some othertext 1234'); // creates code image and outputs it directly into browser

i checked the documentation and nothing, help! :B

回答1:

ob_start(); QRCode::png('text', null); $imageString = base64_encode( ob_get_contents() ); ob_end_clean();

回答2:

$qrTempDir = 'path/to/your/temp'; $filePath = $qrTempDir.'/'.uniqid();  QRcode::png('some text', $filePath); $qrImage = file_get_contents($filePath);  unlink($filePath);

This should be what you're looking for. You can extend it to show an image like that:

<img src="data:image/png;base64,<?php echo base64_encode($qrImage) ?>" />

Unfortunately, the library does not support any other method at the moment, because calling the QRcode::png function without the file parameter not only makes it send those headers, but it also exits the code execution, so there is no retracting or overwriting the headers.

回答3:

I ran into the same problem as @iim.hlk

This is what i did slightly modified @Lusitanian his answer to this

ob_start(); QRCode::png($string); $imageString = base64_encode( ob_get_clean() ); header('Content-Type: text/html');

This fixes the header issue by simply overwriting it. Not clean or anything but it works for the purpose.

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