这里有新鲜出炉的PHP面向对象编程,程序狗速度看过来!
PHP(外文名: Hypertext Preprocessor,中文名:“超文本预处理器”)是一种通用开源脚本语言。语法吸收了C语言、Java和Perl的特点,入门门槛较低,易于学习,使用广泛,主要适用于web开发领域。PHP的文件后缀名为php。
这篇文章主要介绍了PHP生成图片验证码功能,结合实例形式简单介绍了php生成验证码图片的操作技巧,具有一定参考借鉴价值,需要的朋友可以参考下
本文实例讲述了PHP生成图片验证码功能。分享给大家供大家参考,具体如下:
只是简单的用随机函数实现了图片的生成,没有对验证的整个流程做介绍。
代码如下:
- <?php
- /**
- * Created by JetBrains PhpStorm.
- * User: lee
- * To change this template use File | Settings | File Templates.
- */
- header("content-type:image/png");
- $validateLength=4;
- $strToDraw="";
- $chars=[
- "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",
- "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"
- ];
- $imgW=80;
- $imgH=25;
- $imgRes=imagecreate($imgW,$imgH);
- $imgColor=imagecolorallocate($imgRes,255,255,100);
- $color=imagecolorallocate($imgRes,0,0,0);
- for($i=0;$i<$validateLength;$i++){
- $rand=rand(1,58);
- $strToDraw=$strToDraw." ".$chars[$rand];
- }
- imagestring($imgRes,5,0,5,$strToDraw,$color);
- for($i=0;$i<100;$i++){
- imagesetpixel($imgRes,rand(0,$imgW),rand(0,$imgH),$color);
- }
- imagepng($imgRes);
- imagedestroy($imgRes);
运行效果如下:
希望本文所述对大家PHP程序设计有所帮助。
来源: http://www.phperz.com/article/17/0831/340711.html