PHP two dimensional code generation _php technique

This article describes two ways to generate two-dimensional code using PHP.
(1) Using Google to generate two-dimensional code of the Open Interface, the code is as follows:

/** 
 * Google API two-dimensional code generation "QRCode can store up to 4,296 alphanumeric types of any text, you can view two-dimensional code data format" 
 * @param string $data Two-dimensional code contains information, can be numbers, characters, Binary information, Chinese characters. Cannot mix data type, data must pass through UTF-8 url-encoded. If you need to pass more than 2K bytes of information, use the Post method 
 * @param int $widhtHeight Generate a two-dimensional code size setting 
 * @param String $EC _level Optional error correction level, QR code supports four levels of error correction, used to restore lost, read-wrong, fuzzy, data. 
 *       L Default: Can identify lost 7% of data 
 *       M can identify lost 15% of data * 
 Q can identify lost       25% of data 
 *       H can identify lost 30% of data 
 * param int $margin generated two-dimensional code away from the picture border 
/function Generateqrfromgoogle ($data, $widhtHeight = ' The ', $EC _level= ' L ' , $margin = ' 0 ') { 
 $url =urlencode ($data); 
 Echo '  '; 
} 

How to use:

$data = ' All rights reserved: Http://www.jb51.net '; 

The Post method implementation requests that the Google API generate two-dimensional code:

function QRCode ($width, $height, $string) { 
 $post _data=array (); 
 $post _data[' cht ']= ' QR '; 
 $post _data[' CHS ']= $width. " X ". $height; 
 $post _data[' CHL ']= $string; 
 $post _data[' Choe ']= "UTF-8"; 
 $url = "Http://chart.apis.google.com/chart"; 
 $data _array=array (); 
 foreach ($post _data as $key => $value) { 
  $data _array[]= $key. ' = '. $value; 
 } 
 $data =implode ("&", $data _array); 
 $ch =curl_init (); 
 curl_setopt ($ch, Curlopt_post, 1); 
 curl_setopt ($ch, Curlopt_header, 0); 
 curl_setopt ($ch, Curlopt_url, $url);  
 curl_setopt ($ch, Curlopt_postfields, $data); 
 curl_setopt ($ch, Curlopt_returntransfer, 1); 
 $result =curl_exec ($ch); 
 echo " 
 

How to use:

Header ("Content-type:image/png"); 
$width =300; 
$height =300; 
$data = ' All rights reserved: Http://www.jb51.net ';
Echo QRCode ($width, $height, $data); 

Of course, the resulting picture is the same as the above.

(2) Using PHP QR code class library to generate two-dimensional code
Note Using this class library must first download the class library package and download the address:
Address: http://phpqrcode.sourceforge.net/
There are many examples of downloaded packages, which can be studied by themselves, and a simple use case is given below (the exact meaning of the parameters is similar to the above):

<?php 
include "./phpqrcode.php"; 
$data = ' All rights reserved: Http://www.jb51.net '; 
$errorCorrectionLevel = "L"; 
$matrixPointSize = "4"; 
QRCode::p ng ($data, False, $errorCorrectionLevel, $matrixPointSize);

The above mentioned is the entire content of this article, I hope to be proficient in the production of PHP two-dimensional code can help.