本文实例讲述了php实现的简单中文验证码功能。分享给大家供大家参考,具体如下:
img.php
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<?php session_start(); /*for($i=0;$i<4;$i++) { $rand .= dechex(rand(1,15)); } $_SESSION[check_pic] = $rand; */ $image = imagecreatetruecolor(100, 30); $bg = imagecolorallocate( $image , 0, 0, 0); $color = imagecolorallocate( $image , 255, 255, 255); //imagestring($image, rand(1,6), rand(3,60), rand(3,15), $rand, $color); for ( $i =0; $i <3; $i ++) { $color2 = imagecolorallocate( $image , rand(0,255), rand(0,255),rand(0,255)); imageline( $image , rand(0,100), 0, 100, 30, $color2 ); } //rand() ---->0-max 不大于100 for ( $i =0; $i <200; $i ++) { imagesetpixel( $image , rand()%100, rand()%30, $color2 ); } //$str = iconv("gbk", "utf-8", "中"); $str = "中国" ; $_SESSION [check_pic] = $str ; //解决中文,页面本身为utf-8 $str = mb_convert_encoding( $str , "html-entities" , "utf-8" ); //2:字体大小 3:倾斜角度 x , y 坐标 imagettftext( $image , 12, 0, 20, 20, $color , 'MSYH.TTF' , $str ); //输出图片 header( "Content-type: image/jpeg;charset=utf-8" ); imagejpeg( $image ); /*修改eclipse的配置,可以使得eclipse的新建项目的默认编码直接为UTF-8 在菜单栏的 Window->Preferences->General->Workspace->Text file encoding 将其改为UFT-8即可。*/ ?> |
sub.php
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<?php header( "Content-type: text/html;charset=utf-8" ); session_start(); if ( $_POST [check]) { if ( $_POST [check]== $_SESSION [check_pic]) { echo "验证码正确:" . $_SESSION [check_pic]; } else { echo "验证码错误:" . $_SESSION [check_pic]; } } ?> <form action= "" method= "post" > <img id="codetool">
运行效果图如下:
希望本文所述对大家PHP程序设计有所帮助。 相关文章
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