WordPress generates a two-dimensional code tutorial for the article

The simplest way to invoke this is to call Google directly.

The code is as follows	Copy Code
"width=" "height=" alt= "QR Code"/>

Just change the size of the 150 image in the above code,

The code is as follows	Copy Code
<?php The_permalink ();?>

is to automatically get the article link, if you want to generate a blog site two-dimensional code as long as the replacement of the blog domain name fixed links can be.

I have changed, encapsulated into a function, so that the size of the picture can be changed, but in fact, it is not convenient to use, because the theme of the function must be written dead, unless combined with the background to set two-dimensional code picture size, it is not very useful.

The above method is directly through the Google API to generate pictures, some places may be due to network problems, will be very slow, so the small butterfly students in the Hu Changmong request, and do a local cache image processing

First, add code in functions.php

The code is as follows

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Function Get_qr ($url, $path, $qrpic) {      set_time_limit (10);//Set 10 sec timeout   $destination _folder = $path $path. ' /':'';   $localname = $destination _folder. $qrpic;       $file = fopen ($url, "RB");//fop r+ mode of the EN function: Read-write method open file pointer to file header  if ($file) {        $NEWF = fopen ($localname, "W B "); w+, read-write method open file pointer to file header if the file does not exist then try to create the   if ($NEWF)         while ( !feof ($file)) {         fwrite ($NEWF, Fread ($file, 1024 * 2), 1024 * 2); /write file, fread control file maximum size, here is 2M    }      }      if ($file) {       fclose ($file); //close fopen open files     }      if ($NEWF) {       fclose ($NEWF);       }     }

Second, create a new folder called QRCode in the root directory of the Web site to ensure write access

The following code is placed where you need to output a two-dimensional code picture, such as single.php

The code is as follows

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<?php $LOCALQR = Abspath. ' qrcode/'. get_the_id (). JPG '; if (!file_exists ($LOCALQR)) {//If the picture already exists, it will not be saved again GET_QR ("http://chart.googleapis.com/chart?cht=qr&chs=100x100&choe=UTF-8&chld=L|4&chl=". get_ Permalink (), "QRCode", get_the_id (). JPG ");//The picture name is named after the article ID } ?> /qrcode/<?php the_id () >.jpg "width=" "height=" alt= "QR Code"/& Gt

<!--The default two-dimensional code picture size is 100*100, if you want to change, need to change 4 places, has been marked with blue;