php中文與英文驗證碼程序代碼

2024-09-04 11:44:33

字體：大中小

來源：轉載

供稿：網友

英文驗證碼相對簡單,不要作hex處理,直接用色彩值就OK了,yzm.php實例代碼如下:

session_start();

function rand_create()

{

    //通知瀏覽器將要輸出PNG圖片

    Header("Content-type: image/PNG");

    //準備好隨機數發生器種子

    srand((double)microtime()*1000000);

    //準備圖片的相關參數

    $im = imagecreate(62,22);

    $black = ImageColorAllocate($im, 0,0,0);  //RGB黑色標識符

    $white = ImageColorAllocate($im, 255,255,255); //RGB白色標識符

    $gray = ImageColorAllocate($im, 200,200,200); //RGB灰色標識符

    //開始作圖

    imagefill($im,0,0,$gray);

    while(($randval=rand()%100000)<10000);{

        $_SESSION["Auth_code"] = $randval;

        //將四位整數驗證碼繪入圖片

        imagestring($im, 5, 10, 3, $randval, $black);

    }

    //加入干擾象素

    for($i=0;$i<200;$i++){

        $randcolor = ImageColorallocate($im,rand(0,255),rand(0,255),rand(0,255)); //開源代碼Vevb.com

        imagesetpixel($im, rand()%70 , rand()%30 , $randcolor);

    }

    //輸出驗證圖片

    ImagePNG($im);

    //銷毀圖像標識符

    ImageDestroy($im);

}

rand_create();

調用方法<img src=yzm.php />

中文驗證碼程序如下:

Header("Content-type: image/PNG");

$str = "這里設置一中文如果中國WEB第一站www.49028c.com";

$imagesW = 140;

$imagesH = 40;

//

$Auimg = imagecreate($imagesW,$imagesH);

$bgc = ImageColorAllocate($Auimg,255,255,255);

$font = "heiti.ttf";//這里設置字體，你可以隨便下載一款字體哦。

$white=imagecolorallocate($Auimg,234,185,95);

imagearc($Auimg, 150, 8, 20, 20, 75, 170, $white);

imagearc($Auimg, 180, 7,50, 30, 75, 175, $white);

imageline($Auimg,20,20,180,30,$white);

imageline($Auimg,20,18,170,50,$white);

imageline($Auimg,25,50,80,50,$white);

$noise_num = 800;

$line_num = 20;

imagecolorallocate($Auimg,0xff,0xff,0xff);

$rectangle_color=imagecolorallocate($Auimg,0xAA,0xAA,0xAA);

$noise_color=imagecolorallocate($Auimg,0x00,0x00,0x00);

$font_color=imagecolorallocate($Auimg,0x00,0x00,0x00);

$line_color=imagecolorallocate($Auimg,0x00,0x00,0x00);

for($i=0;$i<$noise_num;$i++){

imagesetpixel($Auimg,mt_rand(0,$imagesW),mt_rand(0,$imagesH),$noise_color);

}

for($i=0;$i<$line_num;$i++){

imageline($Auimg,mt_rand(0,$imagesW),mt_rand(0,$imagesH),mt_rand(0,$imagesW),mt_rand(0,$imagesH),$line_color);

}

$mtRnd=rand(0,strlen($str)-4);

if($mtRnd%2)$mtRnd+=1;

$str = substr($str,$mtRnd,8);

$str = iconv("GB2312","UTF-8",$str);

ImageTTFText($Auimg, 20, 0, 16, 30, $font_color, $font, $str);

ImagePNG($Auimg);

ImageDestroy($Auimg);