Example of using the GD library to create a round pie chart in PHP, GD round
In PHP, there are some simple image functions can be used directly, but most of the images to be processed, you need to compile PHP with the GD library. In addition to
PHP image processing using the Imagecolorallocate () function to set the color example, imagecolorallocate
The use of PHP to dynamically output beautiful images, but also inseparable from the color settings, like painting when you need to use a
PHP is still more commonly used, so I studied the PHP recursive algorithm, here to take out and share with you, hope to be useful to everyone. PHP, a nested abbreviated name, is an abbreviation for the English Super Text preprocessing language
The use of PHP itself with the function to achieve the image verification code generation function, the need for friends can refer to.
Must start or continue session and save CAPTCHA string in $_session for
It to is available to other requests
PHP generated Verification code file is a learning PHP friends should know the technology oh, this can not only make your site security to improve some, you can also note some machine registration and other problems Oh, below we will look at a
In PHP 5.0.1, gd2.0.28 supports creating GIF images. I tested it. I have attached an image verification code that I wrote. I encapsulated it into a class in disorder. Actually, I can use the function. Modify it by yourself.
/*** @ Author shenkong *
There is no constructor like C ++ or Ruby in Ruby, but we can still create multiple constructor similar to this:
Class coloredrectangle def initialize (R, G, B, S1, S2) @ r, @ g, @ B, @ S1, @ S2 = R, G, B, S1, s2 end def coloredrectangle. white_
Ov511usb camera driver with Linux-2.4.18 kernel transplanted on S3C2410 Development Board
Content1. Driver2. Application writing
1. DriverThe Linux-2.4.18 is a drive with an ov511 camera by default, selected from the USB device, and activated the
The custom control has been implemented in the previous introduction, and the widget is placed in the main interface to draw a circle. For details, refer to "QT custom window"
The following describes how to set the paint brush color and the fill
I saw an article about ptrace code injection in linuxjoural, which is very well written, so I have the idea of translating it. The basic content is as follows: if we want to track and debug a running process, we can use ptrace (ptrace_attach .......)
Copy codeThe Code is as follows: // The following code will draw a very beautiful leaf
// Define the point of view of PI
Define ("PII", M_PI/180 );
// Create an image resource and set the background to white. The foreground color to black.
$ Im =
Php generates the pie chart implementation code. you can test it. Pie chart
The code is as follows:
// + ------------------------ +
// | Pie3dfun. PHP // public function |
// + ------------------------ +
Define ("ANGLE_STEP", 3); // defines the
Describes PHP recursive algorithms. PHP is still quite common, so I studied the PHP recursive algorithm and shared it with you here. I hope it will be useful to you. PHP, a nested abbreviation name, is more commonly used than PHP in English, so I
Http://www.pin5i.com/showtopic-22246.htmlDescribe the ideas and algorithms.The full text is divided into two parts, the first part of the recognition of the license plate recognition and common method of identification, the second part of the
The previous article described how to use a virtual machine to run our written operating system, but the previous operating system only exists in the boot sector, and then we will see how the program jumps from the boot sector to another
A floppy boot code, and a screen display:;Hello-os;tab=4 TAB key for broadband;standard FAT12 format floppy disk-specific code stand FAT12 format floppy code the floppy disk formatted with Windows is this formatdb 0xeb, 0x4e, 0x90 db"HELLOIPL"
At first, the author made a file full of binaries, which was created using Binary editor. The Software http://www.vcraft.jp/soft/bz.htmlOf course, in my opinion, these binaries are meaningless because they are not readable at all.But the author
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