Php Gd Image Library

Just install some third-party library files and have a certain degree of geometric knowledge, you can use PHP to create and process images. Creating a dynamic image with PHP is fairly easy. Below, I will detail how to achieve. Before using the basic image creation function, you need to install the GD library file. If you want to use JPEG-related image creation functions, you also need to install jpeg-6b, and you must install t1lib if you want to use Type 1 fonts in your images. In the establishment of the image creation environment, but also need to do some quasi ...

How to make PHP at the same time support GIF, PNG, JPEG In RedHat6.2 according to the manual installation of PHP installed and found only deal with GIF images can not handle JPEG images. Later, I know that PHP handles images using the GD library, which initially supported the GIF. However, since the GIF uses a copyright controversial LZW algorithm that causes legal problems, GD libraries no longer support GD-1.6 GIF instead to support better, non-copyright-controversial PNGs. And I now want to support both GIF, PNG and JPE ...

In the Web application is often used to generate pictures of this function, in the PHP tutorial to create pictures need to support the GD library to create graphics, with this graphic function, we can easily generate thumbnails, verification code, to add watermarks and so on. In PHP to install the GD library to normal operation to create a picture function, the following methods, in the win system, find php.ini put; Extension=php_gd2.dll front ";" Go, and back up Apache OK. Here we look at the example of PHP ...

.jpgraph Open Source Project Description jpgraph is an object-oriented graphics to create a function library. It can be used to generate histograms, pie charts, Gantt charts, mesh charts and other commonly used to some of the graphics. Supported image formats are gif, jpg and png. jpgraph is an open source php tutorial to prepare a dedicated class library. It makes the mapping becomes a very simple matter, you only need to remove the relevant data from the database tutorials, define the title, the chart type and so on, you only need to learn to master one of the few jpgraph built-in functions (...

In PHP to generate a CAPTCHA image is quite simple, because in PHP for us to provide a graphics Gd.dll library, to enable the GD graphics library we just php.ini in the PHP-GD front; Method a $authnum = '; $ychar = "0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z&qu ...

image mask * * @copyright ugia.cn * / function imagemask (& $ im, $ x1, $ y1, $ x2, $ y2, $ deep) {for ($ x = $ x1; $ x <$ x2; $ x + = $ deep) {& nbs ...

Three PHP tutorial Chinese verification code generation and transfer method Generate Chinese verification code in PHP must be generated and generated verification verification code is not the same operation, because gd function only accepts utf8 format encoded text, so use php to generate Chinese verification Before the first code to be encoded conversion, operation iconph icon can be an instance of PHP. * / $ ch_str = "Chinese characters you want to generate Chinese characters"; $ str = array (); for ($ i = 0; $ i <strlen ($ ch_s ...

The intermediary transaction SEO diagnoses Taobao guest cloud host technology Hall Picture anti-theft: Is does not want own picture to be used by others. Picture anti-theft chain: is not want their own pictures are used by others, and consumption of their own server traffic. Picture burglar is difficult, perfect picture burglar that is almost impossible.  But there are still a lot of ways to reduce image theft, below are 10 kinds, choose one you like. ...

Phplot is a graphic library for dynamic science, business, and stock market charts. It allows phphttp://www.aliyun.com/zixun/aggregation/7155.html "> developers to create pie charts, histogram, line diagrams, point diagrams, etc. from a PHP application. Phplot is a PHP graphics class for charts and floor plans. It works based on PHP5 (but older versions can use PHP4), using the PHP GD extension to generate PN ...

This PHP tutorial generates pictures and verification code picture generation principle code, is by the PHP GD library to support, if your system can not create a picture on the front of the Gd.dll; ? $w? $RESIZEWIDTH = $w: $RESIZEWIDTH =400;//to generate the width of the picture $h? $RESIZEHEIGHT = $h: $RESIZEHEIGHT =400;//The height of the picture fun ...