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Cases 1, produce a picture of PNG2. Set the background color for the picture3. Set font color and style4, generate a 4-digit random verification code5, the resulting each character adjusted rotation angle and position to the PNG picture6, add noise

Previously felt that there is a long list of error injection, there are various concat (), Rand () and other functions, not easy to remember and use, has not been much careful study. This special study a bit, read some Daniel's summary, get some

Previously felt that there is a long list of error injection, there are various concat (), Rand () and other functions, not easy to remember and use, has not been much careful study. This special study a bit, read some Daniel's summary, get some

Because of review, stopped for several days, today change mode did a bit about the error echo of the CTF topic, first attached title: hereCollated some of the online on the error Echo method, here do not bring the address, please Daniel forgive: P　　0

Since registering often uses the registration code to prevent the machine from malicious registration, here I publish a PNG image verification code basic images, very simple but the idea is very clear:1, produce a picture of PNG2. Set the background

Verification code is very important in Web application, which is usually used to prevent users from submitting forms maliciously, such as malicious registration and login, forum malicious irrigation, etc. This article will illustrate the use of PHP

Verification codes are used in many places. Here we provide a newly developed security verification code class that supports generating GIF image verification codes (with noise, interference lines, grids, random backgrounds, and random custom fonts,

For example, you use PHP to develop the site's Member login page, of course, to implement verification code, verification code can be static, or dynamic, text can be Chinese characters, English, French, Japanese and so on, can be casually replaced.

Php implements the watermarking technique for uploading multiple images. Copy the code as follows :? PhpfunctionimageWaterMark ($ groundImage, $ waterPos0, $ waterImage, $ waterText, $ textFont5, $ textColor # FF0000) {$ isWaterImageFALSE; $

Php verification code (tilt, sine interference line, pasting, rotating ). I haven't written any post for a long time. I have been busy with new projects. Recently, I have been trying to develop a simple and generous verification code program, which

PHP class used to add watermarks to images. Copy the code as follows :? Php ** function: PHP image watermark (Watermark supports images or text) * parameter: * $ groundImage background image, that is, the image to be watermarked. Currently, only GIF,

Php image upload class. Classupload_class {private $ ptname; name of the upload form; private $ udname; whether to create a subdirectory by month (0 is no, others are true); private $ ufname; whether to create a file name by time class upload_class {

Php adds watermarks to and from images. Php Tutorial: add watermarks to images and upload images. php functions: PHP image watermarks (watermarks support images or text) * parameter: * $ groundImage background image, that is, the php Tutorial for

How to change the font size of the php verification code [color = # 0000FF] the number displayed in the verification code image is too small. how can I change the font size in the following code, is that the number is bigger [/color] // Generate a

PHP Verification Code Small Project:Header (' Content-type:image/jpeg ');$img =imagecreatetruecolor (120,40);//Build image$element =array (' A ', ' B ', ' C ', ' d ', ' e ', ' f ', ' g ', ' h ', ' I ', ' j ', ' K ');//Captcha random letter, set

Php adds watermarks to images in batches. We often encounter the need to add watermarks to a large number of images at a time. In this case, the image watermark function is added in batches, we provide you with a php batch add watermark

Copy codeThe Code is as follows:Function imageWaterMark ($ groundImage, $ waterPos = 0, $ waterImage = "", $ waterText = "", $ textFont = 5, $ textColor = "# FF0000 "){$ IsWaterImage = FALSE;$ FormatMsg = "this file format is not supported currently.

PHP Learning Notes--verification codeSample code to generate a verification code in the PHP training tutorial:Session_Start ();//Generate Verification code pictureHeader ("Content-type:image/png");$im = Imagecreate (44, 18); Draw a picture that

This article provides a detailed analysis of php Verification Code (skew, sine interference line, pasting, rotating). For more information, see This article provides a detailed analysis of php Verification Code (skew, sine interference line, pasting,

In php, adding watermarks to Chinese characters requires some simple processing. one is to convert characters into gbk, and the other is to load Chinese fonts, with these two conditions, adding a Chinese watermark to the image is simple. Example