php 中文汉字验证码生成程序(1/3)

php 中文汉字验证码生成程序 这款关于php 中文汉字验证码生成程序其实很简单的，生成中文汉字验证码需要字体来支持了，下面我们用的arial.ttf来支持生成，否则生成中文图片验证码会出乱码的。

php教程 中文汉字验证码生成程序
这款关于php 中文汉字验证码生成程序其实很简单的，生成中文汉字验证码需要字体来支持了，下面我们用的arial.ttf来支持生成，否则生成中文图片验证码会出乱码的。
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class securecode {     private static $instance=null;     private $code = '';     private $fontfile;     private $validate;     private $image;     private $specialadd = 'special string for securecode';     private $codeexpire=86400;     private $codecookiename='secure_code';     /**      * 构造方法      */     private function securecode()     {         $this->fontfile = dirname( __file__ ) . '/arial.ttf';     }     private function __construct()     {         $this->securecode();     }         public static function getinstance()     {         if (self::$instance==null)             self::$instance=new self();                 return self::$instance;     }     /**      * 指定字体文件所在路径，默认为当前文件夹下arial.ttf文件      * @param $fontfile 文件路径      * @return void      */     function loadfont($fontfile)     {         $this->fontfile = $fontfile;     }     /**      * 图片输出方法，在执行本方法前程序不应该有任何形式的输出      * @return void;      */     function stroke()     {         $this->savecode();         self::sendheader();         imagegif( $this->validate );         imagedestroy( $this->validate );         imagedestroy( $this->image );     }     /**      * 图片保存方法      * @param $filename 保存路径      * @return void      */     function save($filename)     {         $this->savecode();         imagegif( $this->validate , $filename );         imagedestroy( $this->validate );         imagedestroy( $this->image );     }       /**      * 验证码验证方法      * @param $input 要验证的字符串，即用户的输入内容      * @return boolean 验证结果      */     function verify($input)     {         $input=strtolower($input);         $targetcode=$this->authcode($input);         $code=$this->getcookie();         if (empty($code)||$code!=$targetcode)             $result= false;         else             $result=true;         $_cookie[$this->codecookiename]='';         setcookie ( $this->codecookiename, '', - 1 );         return $result;     }     /**      * 图片创建方法      * @return void;      */     function createimage()     {         $this->randcode();                 $size = 30;         $width = 90;         $height = 35;         $degrees = array (             rand( 0 , 30 ), rand( 0 , 30 ), rand( 0 , 30 ), rand( 0 , 30 )         );                 for ($i = 0; $i image = imagecreatetruecolor( $size , $size );         $this->validate = imagecreatetruecolor( $width , $height );         $back = imagecolorallocate( $this->image , 255 , 255 , 255 );         $border = imagecolorallocate( $this->image , 0 , 0 , 0 );         imagefilledrectangle( $this->validate , 0 , 0 , $width , $height , $back );                 for ($i = 0; $i 60) $temp[2] = 60;                         $temp = self::hsvtorgb( $temp[0] , $temp[1] , $temp[2] );             $textcolor[$i] = imagecolorallocate( $this->image , $temp[0] , $temp[1] , $temp[2] );         }                 for ($i = 0; $i validate , rand( 0 , 255 ) , rand( 0 , 255 ) , rand( 0 , 255 ) );             imagesetpixel( $this->validate , rand( 1 , 87 ) , rand( 1 , 35 ) , $randpixelcolor );         }                 $temp = self::rgbtohsv( rand( 220 , 255 ) , rand( 220 , 255 ) , rand( 220 , 255 ) );                 if ($temp[2] image , $temp[0] , $temp[1] , $temp[2] );                 self::imagelinethick( $this->validate , $textcolor[rand( 0 , 3 )] );                 imagefilledrectangle( $this->image , 0 , 0 , $size , $size , $back );         putenv( 'gdfontpath=' . realpath( '.' ) );                 // name the font to be used (note the lack of the .ttf extension         imagettftext( $this->image , 15 , 0 , 8 , 20 , $textcolor[0] , $this->fontfile , $this->code[0] );                 $this->image = imagerotate( $this->image , $degrees[0] , $back );         imagecolortransparent( $this->image , $back );         imagecopymerge( $this->validate , $this->image , 1 , 4 , 4 , 5 , imagesx( $this->image ) - 10 , imagesy( $this->image ) - 10 , 100 );                 $this->image = imagecreatetruecolor( $size , $size );         imagefilledrectangle( $this->image , 0 , 0 , $size , $size , $back );         imagettftext( $this->image , 15 , 0 , 8 , 20 , $textcolor[1] , $this->fontfile , $this->code[1] );         $this->image = imagerotate( $this->image , $degrees[1] , $back );         imagecolortransparent( $this->image , $back );         imagecopymerge( $this->validate , $this->image , 21 , 4 , 4 , 5 , imagesx( $this->image ) - 10 , imagesy( $this->image ) - 10 , 100 );                 $this->image = imagecreatetruecolor( $size , $size );         imagefilledrectangle( $this->image , 0 , 0 , $size - 1 , $size - 1 , $back );         imagettftext( $this->image , 15 , 0 , 8 , 20 , $textcolor[2] , $this->fontfile , $this->code[2] );         $this->image = imagerotate( $this->image , $degrees[2] , $back );         imagecolortransparent( $this->image , $back );         imagecopymerge( $this->validate , $this->image , 41 , 4 , 4 , 5 , imagesx( $this->image ) - 10 , imagesy( $this->image ) - 10 , 100 );                 $this->image = imagecreatetruecolor( $size , $size );         imagefilledrectangle( $this->image , 0 , 0 , $size - 1 , $size - 1 , $back );         imagettftext( $this->image , 15 , 0 , 8 , 20 , $textcolor[3] , $this->fontfile , $this->code[3] );         $this->image = imagerotate( $this->image , $degrees[3] , $back );         imagecolortransparent( $this->image , $back );         imagecopymerge( $this->validate , $this->image , 61 , 4 , 4 , 5 , imagesx( $this->image ) - 10 , imagesy( $this->image ) - 10 , 100 );         imagerectangle( $this->validate , 0 , 0 , $width - 1 , $height - 1 , $border );     }

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