php两款生成图形验证码的代码
验证码在php中是经常会用到了,下面我们为你提供了一些关于php验证码生成类与程序,直接复制下去就可以直接用的,下面看代码.
<?php session_start(); Header("Content-type: image/gif"); class SecurityCode { private $codes = ''; function __construct() { $code = '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'; $codeArray = explode('-', $code); shuffle($codeArray); $this->codes = implode('', array_slice($codeArray, 0, 4)); } public function CreateImg() { $_SESSION['check_pic'] = $this->codes; $img = imagecreate(70, 25); imagecolorallocate($img, 222, 222, 222); $testcolor1 = imagecolorallocate($img, 255, 0, 0); $testcolor2 = imagecolorallocate($img, 51, 51, 51); $testcolor3 = imagecolorallocate($img, 0, 0, 255); $testcolor4 = imagecolorallocate($img, 255, 0, 255); for ($i = 0; $i < 4; $i++) { imagestring($img, rand(5, 6) , 8 + $i * 15, rand(2, 8) , $this->codes[$i], rand(1, 4)); } imagegif($img); } } $code = new SecurityCode(); $code->CreateImg(); $code = NULL; ?>
//代码二
<?php session_start(); for ($i = 0; $i < 4; $i++) { $rand.= dechex(rand(1, 15)); } //开源代码phprm.com $_SESSION[check_pic] = $rand; //echo $_SESSION[check_pic]; // 设置图片大小">图片大小 $im = imagecreatetruecolor(100, 30); // 设置颜色 $bg = imagecolorallocate($im, 0, 0, 0); $te = imagecolorallocate($im, 255, 255, 255); // 把字符串写在图像左上角 imagestring($im, rand(5, 6) , rand(25, 30) , 5, $rand, $te); // 输出图像 header("Content-type:image/jpeg"); imagejpeg($im);
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随意转载^^但请附上教程地址。