What Is Gd Library

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 ...

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 ...

Imagettftext (PHP3, PHP4) imagettftext---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Use TrueType fonts to write text to graphics syntax: array imagettftext int IM, int size, int angle, int x, I ...

GetImageSize (PHP3, PHP4) getimagesize---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Gets the size syntax for GIF, JPEG, PNG, or SWF graphics: array getimagesize (string filename [, array imageinfo ...).

.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 (...

Imagegif (PHP3, PHP4) imagegif---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Output graphics to the refer or file syntax: int imagegif (int im [, string filename]) Description: Imagegif () the graphics IM established in the filename fil ...

Read_exif_data (PHP4 >= 4.0.1) read_exif_data---&http://www.aliyun.com/zixun/aggregation/37954.html "> nbsp; To read EXIF header syntax from a JPEG graphics file: Array read_exif_data (string filename) Description: Read_exi ...

In the era of cyber-security, the verification code function can at least be regarded as a trustworthy good guard. In this article, we'll talk about how to use the CAPTCHA function in thinkphp. The Extension class Library Thinkphp's extensions are performed with the image processing class image and the character processing class string used to generate the random CAPTCHA code to complete the verification code function, which can be done in http://www.thinkphp.cn/extend/225. HTML download image processing class and http://www.thinkph ...

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 ...

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