ImageCode函數通過GIFEncoder類實現的GIF動畫的PHP源代碼，有興趣的朋友可以研究一下。效果如圖：
復制代碼 代碼如下:
/**

* ImageCode 生 " /> 黄色毛片在线看,涩涩网站在线看,成年人在线免费观看

一区二区久久-一区二区三区www-一区二区三区久久-一区二区三区久久精品-麻豆国产一区二区在线观看-麻豆国产视频

PHP使用GIFEncoder類生成的GIF動態圖片驗證碼

2014-10-22 20:40:34 分類：php技術 閱讀()

相信很多人都想過如何用php生成GIF動畫來實現動態圖片驗證碼，以下是實現過程。
ImageCode函數通過GIFEncoder類實現的GIF動畫的php源代碼，有興趣的朋友可以研究一下。

效果如圖：
復制代碼 代碼如下:
/**
 
* ImageCode 生成GIF圖片驗證
 
* @param $string 字符串
 
* @param $width 寬度
 
* @param $height 高度
 
* */
 
function ImageCode($string = '', $width = 75, $height = 25)
 
{
 
$authstr = $string ? $string : ((time() % 2 == 0) ? mt_rand(1000, 9999) : mt_rand(10000, 99999));
 
$board_width = $width;
 
$board_height = $height;
 
// 生成一個32幀的GIF動畫
 
for($i = 0; $i < 32; $i++)
 
{
 
ob_start();
 
$image = imagecreate($board_width, $board_height);
 
imagecolorallocate($image, 0,0,0);
 
// 設定文字顏色數組
 
$colorList[] = ImageColorAllocate($image, 15,73,210);
 
$colorList[] = ImageColorAllocate($image, 0,64,0);
 
$colorList[] = ImageColorAllocate($image, 0,0,64);
 
$colorList[] = ImageColorAllocate($image, 0,128,128);
 
$colorList[] = ImageColorAllocate($image, 27,52,47);
 
$colorList[] = ImageColorAllocate($image, 51,0,102);
 
$colorList[] = ImageColorAllocate($image, 0,0,145);
 
$colorList[] = ImageColorAllocate($image, 0,0,113);
 
$colorList[] = ImageColorAllocate($image, 0,51,51);
 
$colorList[] = ImageColorAllocate($image, 158,180,35);
 
$colorList[] = ImageColorAllocate($image, 59,59,59);
 
$colorList[] = ImageColorAllocate($image, 0,0,0);
 
$colorList[] = ImageColorAllocate($image, 1,128,180);
 
$colorList[] = ImageColorAllocate($image, 0,153,51);
 
$colorList[] = ImageColorAllocate($image, 60,131,1);
 
$colorList[] = ImageColorAllocate($image, 0,0,0);
 
$fontcolor = ImageColorAllocate($image, 0,0,0);
 
$gray = ImageColorAllocate($image, 245,245,245);
 
$color = imagecolorallocate($image, 255,255,255);
 
$color2 = imagecolorallocate($image, 255,0,0);
 
imagefill($image, 0, 0, $gray);
 
$space = 15; // 字符間距
 
if($i > 0) // 屏蔽第一幀
 
{
 
for ($k = 0; $k < strlen($authstr); $k++)
 
{
 
$colorRandom = mt_rand(0,sizeof($colorList)-1);
 
$float_top = rand(0,4);
 
$float_left = rand(0,3);
 
imagestring($image, 6, $space * $k, $top + $float_top, substr($authstr, $k, 1), $colorList[$colorRandom]);
 
}
 
}
 
for ($k = 0; $k < 20; $k++)
 
{
 
$colorRandom = mt_rand(0,sizeof($colorList)-1);
 
imagesetpixel($image, rand()%70 , rand()%15 , $colorList[$colorRandom]);
 
}
 
// 添加干擾線
 
for($k = 0; $k < 3; $k++)
 
{
 
$colorRandom = mt_rand(0, sizeof($colorList)-1);
 
// $todrawline = rand(0,1);
 
$todrawline = 1;
 
if($todrawline)
 
{
 
imageline($image, mt_rand(0, $board_width), mt_rand(0,$board_height), mt_rand(0,$board_width), mt_rand(0,$board_height), $colorList[$colorRandom]);
 
}
 
else
 
{
 
$w = mt_rand(0,$board_width);
 
$h = mt_rand(0,$board_width);
 
imagearc($image, $board_width - floor($w / 2) , floor($h / 2), $w, $h, rand(90,180), rand(180,270), $colorList[$colorRandom]);
 
}
 
}
 
imagegif($image);
 
imagedestroy($image);
 
$imagedata[] = ob_get_contents();
 
ob_clean();
 
++$i;
 
}
 
$gif = new GIFEncoder($imagedata);
 
Header ('Content-type:image/gif');
 
echo $gif->GetAnimation();
 
}

GIFEncoder類源碼：
復制代碼 代碼如下:
<?php
Class GIFEncoder {
    var $GIF = "GIF89a";                /* GIF header 6 bytes        */
    var $VER = "GIFEncoder V2.06";        /* Encoder version                */
    var $BUF = Array ( );
    var $LOP =  0;
    var $DIS =  2;
    var $COL = -1;
    var $IMG = -1;
    var $ERR = Array (
    'ERR00' =>"Does not supported function for only one image!",
    'ERR01' =>"Source is not a GIF image!",
    'ERR02' =>"Unintelligible flag ",
    'ERR03' =>"Could not make animation from animated GIF source",
    );
    /*
    :::::::::::::::::::::::::::::::::::::::::::::::::::
    ::
    ::        GIFEncoder...
    ::
    */
    function GIFEncoder        (
    $GIF_src, $GIF_dly, $GIF_lop, $GIF_dis,
    $GIF_red, $GIF_grn, $GIF_blu, $GIF_mod
    ) {
        if ( ! is_array ( $GIF_src ) && ! is_array ( $GIF_tim ) ) {
            printf        ( "%s: %s", $this->VER, $this->ERR [ 'ERR00' ] );
            exit        ( 0 );
        }
        $this->LOP = ( $GIF_lop > -1 ) ? $GIF_lop : 0;
        $this->DIS = ( $GIF_dis > -1 ) ? ( ( $GIF_dis < 3 ) ? $GIF_dis : 3 ) : 2;
        $this->COL = ( $GIF_red > -1 && $GIF_grn > -1 && $GIF_blu > -1 ) ?
        ( $GIF_red | ( $GIF_grn << 8 ) | ( $GIF_blu << 16 ) ) : -1;
        for ( $i = 0; $i < count ( $GIF_src ); $i++ ) {
            if ( strToLower ( $GIF_mod ) == "url" ) {
                $this->BUF [ ] = fread ( fopen ( $GIF_src [ $i ], "rb" ), filesize ( $GIF_src [ $i ] ) );
            }
            else if ( strToLower ( $GIF_mod ) == "bin" ) {
                $this->BUF [ ] = $GIF_src [ $i ];
            }
            else {
                printf        ( "%s: %s ( %s )!", $this->VER, $this->ERR [ 'ERR02' ], $GIF_mod );
                exit        ( 0 );
            }
            if ( substr ( $this->BUF [ $i ], 0, 6 ) != "GIF87a" && substr ( $this->BUF [ $i ], 0, 6 ) != "GIF89a" ) {
                printf        ( "%s: %d %s", $this->VER, $i, $this->ERR [ 'ERR01' ] );
                exit        ( 0 );
            }
            for ( $j = ( 13 + 3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ) ), $k = TRUE; $k; $j++ ) {
                switch ( $this->BUF [ $i ] { $j } ) {
                    case "!":
                        if ( ( substr ( $this->BUF [ $i ], ( $j + 3 ), 8 ) ) == "NETSCAPE" ) {
                            printf        ( "%s: %s ( %s source )!", $this->VER, $this->ERR [ 'ERR03' ], ( $i + 1 ) );
                            exit        ( 0 );
                        }
                        break;
                    case ";":
                        $k = FALSE;
                        break;
                }
            }
        }
        GIFEncoder::GIFAddHeader ( );
        for ( $i = 0; $i < count ( $this->BUF ); $i++ ) {
            GIFEncoder::GIFAddFrames ( $i, $GIF_dly [ $i ] );
        }
        GIFEncoder::GIFAddFooter ( );
    }
    /*
    :::::::::::::::::::::::::::::::::::::::::::::::::::
    ::
    ::        GIFAddHeader...
    ::
    */
    function GIFAddHeader ( ) {
        $cmap = 0;
        if ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x80 ) {
            $cmap = 3 * ( 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 ) );
            $this->GIF .= substr ( $this->BUF [ 0 ], 6, 7                );
            $this->GIF .= substr ( $this->BUF [ 0 ], 13, $cmap        );
            $this->GIF .= "!/377/13NETSCAPE2.0/3/1" . GIFEncoder::GIFWord ( $this->LOP ) . "/0";
        }
    }
    /*
    :::::::::::::::::::::::::::::::::::::::::::::::::::
    ::
    ::        GIFAddFrames...
    ::
    */
    function GIFAddFrames ( $i, $d ) {
        $Locals_str = 13 + 3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) );
        $Locals_end = strlen ( $this->BUF [ $i ] ) - $Locals_str - 1;
        $Locals_tmp = substr ( $this->BUF [ $i ], $Locals_str, $Locals_end );
        $Global_len = 2 << ( ord ( $this->BUF [ 0  ] { 10 } ) & 0x07 );
        $Locals_len = 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 );
        $Global_rgb = substr ( $this->BUF [ 0  ], 13,
        3 * ( 2 << ( ord ( $this->BUF [ 0  ] { 10 } ) & 0x07 ) ) );
        $Locals_rgb = substr ( $this->BUF [ $i ], 13,
        3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ) );
        $Locals_ext = "!/xF9/x04" . chr ( ( $this->DIS << 2 ) + 0 ) .
        chr ( ( $d >> 0 ) & 0xFF ) . chr ( ( $d >> 8 ) & 0xFF ) . "/x0/x0";
        if ( $this->COL > -1 && ord ( $this->BUF [ $i ] { 10 } ) & 0x80 ) {
            for ( $j = 0; $j < ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ); $j++ ) {
                if        (
                ord ( $Locals_rgb { 3 * $j + 0 } ) == ( $this->COL >>  0 ) & 0xFF &
                ord ( $Locals_rgb { 3 * $j + 1 } ) == ( $this->COL >>  8 ) & 0xFF &
                ord ( $Locals_rgb { 3 * $j + 2 } ) == ( $this->COL >> 16 ) & 0xFF
                ) {
                    $Locals_ext = "!/xF9/x04" . chr ( ( $this->DIS << 2 ) + 1 ) .
                    chr ( ( $d >> 0 ) & 0xFF ) . chr ( ( $d >> 8 ) & 0xFF ) . chr ( $j ) . "/x0";
                    break;
                }
            }
        }
        switch ( $Locals_tmp { 0 } ) {
            case "!":
                $Locals_img = substr ( $Locals_tmp, 8, 10 );
                $Locals_tmp = substr ( $Locals_tmp, 18, strlen ( $Locals_tmp ) - 18 );
                break;
            case ",":
                $Locals_img = substr ( $Locals_tmp, 0, 10 );
                $Locals_tmp = substr ( $Locals_tmp, 10, strlen ( $Locals_tmp ) - 10 );
                break;
        }
        if ( ord ( $this->BUF [ $i ] { 10 } ) & 0x80 && $this->IMG > -1 ) {
            if ( $Global_len == $Locals_len ) {
                if ( GIFEncoder::GIFBlockCompare ( $Global_rgb, $Locals_rgb, $Global_len ) ) {
                    $this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp );
                }
                else {
                    $byte  = ord ( $Locals_img { 9 } );
                    $byte |= 0x80;
                    $byte &= 0xF8;
                    $byte |= ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 );
                    $Locals_img { 9 } = chr ( $byte );
                    $this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp );
                }
            }
            else {
                $byte  = ord ( $Locals_img { 9 } );
                $byte |= 0x80;
                $byte &= 0xF8;
                $byte |= ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 );
                $Locals_img { 9 } = chr ( $byte );
                $this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp );
            }
        }
        else {
            $this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp );
        }
        $this->IMG  = 1;
    }
    /*
    :::::::::::::::::::::::::::::::::::::::::::::::::::
    ::
    ::        GIFAddFooter...
    ::
    */
    function GIFAddFooter ( ) {
        $this->GIF .= ";";
    }
    /*
    :::::::::::::::::::::::::::::::::::::::::::::::::::
    ::
    ::        GIFBlockCompare...
    ::
    */
    function GIFBlockCompare ( $GlobalBlock, $LocalBlock, $Len ) {
        for ( $i = 0; $i < $Len; $i++ ) {
            if        (
            $GlobalBlock { 3 * $i + 0 } != $LocalBlock { 3 * $i + 0 } ||
            $GlobalBlock { 3 * $i + 1 } != $LocalBlock { 3 * $i + 1 } ||
            $GlobalBlock { 3 * $i + 2 } != $LocalBlock { 3 * $i + 2 }
            ) {
                return ( 0 );
            }
        }
        return ( 1 );
    }
    /*
    :::::::::::::::::::::::::::::::::::::::::::::::::::
    ::
    ::        GIFWord...
    ::
    */
    function GIFWord ( $int ) {
        return ( chr ( $int & 0xFF ) . chr ( ( $int >> 8 ) & 0xFF ) );
    }
    /*
    :::::::::::::::::::::::::::::::::::::::::::::::::::
    ::
    ::        GetAnimation...
    ::
    */
    function GetAnimation ( ) {
        return ( $this->GIF );
    }
}
?>

php技術：PHP使用GIFEncoder類生成的GIF動態圖片驗證碼，轉載需保留來源！

鄭重聲明：本文版權歸原作者所有，轉載文章僅為傳播更多信息之目的，如作者信息標記有誤，請第一時間聯系我們修改或刪除，多謝。

標簽：
主站蜘蛛池模板： 国产成人精品高清在线观看99 | 亚洲激情视频网 | 国产成人精品免费视频 | 亚洲精品天堂在线观看 | 级毛片久久久毛片精品毛片 | 国产免费麻豆 | 在线视频一区二区三区三区不卡 | 中文字幕一区二区三区在线播放 | 日韩高清一区二区三区五区七区 | 国产成人短视频 | 激情图片亚洲 | 日韩有色| 国产一区二区精品久久 | 波多野结衣一区二区三区高清在线 | 偷偷碰偷偷鲁免费视频 | 黄 色 免 费 网站在线观看 | 美女让男人插 | 另类在线视频 | 亚洲激情成人网 | 婷婷影院在线综合免费视频 | 久青草国产手机在线视频 | 色婷婷资源网 | 国产精品第一页在线 | 国内自拍网红在线综合 | 欧美亚洲国产精品第一页 | 久久九九国产精品怡红院 | 三级毛片网站 | 一级黄色a毛片 | 国产91成人精品亚洲精品 | 色综合国产| 精品一区二区三区在线观看l | 五月婷婷激情四射 | 最新国产精品视频免费看 | 欧美一区二区自偷自拍视频 | 五月婷激情| 精品在线视频播放 | 国产精品午夜在线观看 | 国产中文字幕第一页 | 亚洲国产精品久久久久秋霞小 | 在线免费观看黄色网址 | 伊人网色 |