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PHP generates QR code (learning)

2022-07-28 10:17:00 【Hello, old days】

php The basic way of writing ：

<?php

echo "Hello World!";

1 Advantages of QR code ：（1） Large information capacity

（2） A wide range of coding

（3） Strong fault tolerance

（4） High reliability of post code

（5） Encryption can be introduced

（6） The cost is low , Easy to make

shortcoming ：（1） QR code technology has become a mobile phone virus 、 A new channel for the spread of phishing websites

（2） Information leaks

2. PHP Generate QR Code

First download phpqrcode Class file download , Download address ：https://sourceforge.net/projects/phpqrcode/

Then extract the file to the project file , Finally, create a new one in the project file PHP file , Write the following code in the file to generate a QR code .

3.jq Generate qr code

<!DOCTYPE html>
<html>

	<head>
		<meta charset="UTF-8">
		<title>qrcode</title>
	</head>

	<body>
		<div id="qrcode">

		</div>
		<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.slim.min.js"></script>
		<!--<script src="jquery-qrcode/jquery.qrcode.min.js" type="text/javascript"></script>-->
		<script src="https://cdn.bootcss.com/jquery.qrcode/1.0/jquery.qrcode.min.js"></script>
		<script type="text/javascript">
			// Translate Chinese into utf-8
			function utf16to8(str) {
				var out, i, len, c;
				out = "";
				len = str.length;
				for(i = 0; i < len; i++) {
					c = str.charCodeAt(i);
					if((c >= 0x0001) && (c <= 0x007F)) {
						out += str.charAt(i);
					} else if(c > 0x07FF) {
						out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
						out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F));
						out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
					} else {
						out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F));
						out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
					}
				}
				return out;
			}
            var content = utf16to8(" I love you! ");
			//			$('#qrcode').qrcode("this plugin is great");
			jQuery('#qrcode').qrcode(content);

			$('#qrcode').qrcode({
				width: 64,
				height: 64,
				text: "size doesn't matter"
			});
		</script>
	</body>

</html>

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本文为[Hello, old days]所创，转载请带上原文链接，感谢
https://yzsam.com/2022/209/202207280957584371.html

当前位置：网站首页>PHP generates QR code (learning)

PHP generates QR code (learning)

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