本文章提供一款php中文汉字验证码生成程序,如果在图片片生成汉字,需要font文件和imagettftext函数,用到的时候大家再网上搜索吧,你要产生随机数,那有mt_rand函数,你还要用到session保存这个随机数,如果需要转成utf-8,需要iconv函数.

php中文汉字验证码生成程序实例代码如下:

<?php
class simpleimage {
    var $image;
    var $image_type;
    function load($filename) {
        $image_info = getimagesize($filename);
        $this->image_type = $image_info[2];
        if ($this->image_type == imagetype_jpeg) {
            $this->image = imagecreatefromjpeg($filename);
        } elseif ($this->image_type == imagetype_gif) {
            $this->image = imagecreatefromgif($filename);
        } elseif ($this->image_type == imagetype_png) {
            $this->image = imagecreatefrompng($filename);
        }
    }
    function save($filename, $image_type = imagetype_jpeg, $compression = 75, $permissions = null) {
        if ($image_type == imagetype_jpeg) {
            imagejpeg($this->image, $filename, $compression);
        } elseif ($image_type == imagetype_gif) {
            imagegif($this->image, $filename);
        } elseif ($image_type == imagetype_png) {
            imagepng($this->image, $filename);
        }
        if ($permissions != null) {
            chmod($filename, $permissions);
        }
    }
    function output($image_type = imagetype_jpeg) {
        if ($image_type == imagetype_jpeg) {
            imagejpeg($this->image);
        } elseif ($image_type == imagetype_gif) {
            imagegif($this->image);
        } elseif ($image_type == imagetype_png) {
            imagepng($this->image);
        }
    }
    function getwidth() {
        return imagesx($this->image);
    }
    function getheight() {
        return imagesy($this->image);
    }
    function resizetoheight($height) {
        $ratio = $height / $this->getheight();
        $width = $this->getwidth() * $ratio;
        $this->resize($width, $height);
    }
    function resizetowidth($width) {
        $ratio = $width / $this->getwidth();
        $height = $this->getheight() * $ratio;
        $this->resize($width, $height);
    }
    function scale($scale) {
        $width = $this->getwidth() * $scale / 100;
        $height = $this->getheight() * $scale / 100;
        $this->resize($width, $height);
    }
    function resize($width, $height) {
        $new_image = imagecreatetruecolor($width, $height);
        imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getwidth() , $this->getheight());
        $this->image = $new_image;
    }
}
$newfile = upload_dir . "/icons/" . md5($_session['user']->email) . ".jpg"; //上传文件保存的目录
$image = new simpleimage();
$image->load($_files['icons']['tmp_name']); //上传的临时文件名
$image->resizetowidth(80);

设置宽度 $image->save($newfile);

文章地址:http://www.phprm.com/tuxiang/fs4456.html

转载随意^^请带上本文地址!