PHP は GIFEncoder クラスを使用して GIF 動的画像検証コードを生成する_PHP チュートリアル

/**

* ImageCode は GIF 画像検証を生成します

* @param $string 文字列

* @param $width幅

* @param $height 高さ

**/

関数 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;

// 32フレームのGIFアニメーションを生成します

for($i = 0; $i
{

ob_start();

$image = imagecreate($board_width, $board_height);

imagecolorallocate($image, 0,0,0);

//テキストの色の配列を設定します

$colorList[] = ImageColorAllocate($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);

$space = 15 // 文字間隔
;
if($i > 0) // 最初のフレームをマスクします

{

for ($k = 0; $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
{

$colorRandom = mt_rand(0,sizeof($colorList)-1);

imagesetpixel($image, rand()%70, rand()%15, $colorList[$colorRandom]);

}

//干渉線を追加

for($k = 0; $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]);

}

それ以外

{

$w = mt_rand(0,$board_width);

$h = mt_rand(0,$board_width);

imagearc($image, $board_width - フロア($w / 2) , フロア($h / 2), $w, $h, rand(90,180), rand(180,270), $colorList[$colorRandom]);

}

}

imagegif($image);

imagedestroy($image);

$imagedata[] = ob_get_contents();

ob_clean();

++$i;

}

$gif = 新しいGIFEncoder($imagedata);

ヘッダー ('Content-type:image/gif');

echo $gif->GetAnimation();

}

クラス GIFEncoder {
    var $GIF = "GIF89a";                /* GIF ヘッダー 6 バイト */
    var $VER = "GIFEncoder V2.06";        /* エンコーダーのバージョン */
    var $BUF = 配列 ( );
    var $LOP = 0;
    var $DIS = 2;
    var $COL = -1;
    var $IMG = -1;
    var $ERR = 配列 (
    'ERR00' =>"画像が 1 つだけサポートされていない機能です!",
    'ERR01' =>「ソースは GIF 画像ではありません!」、
    'ERR02' =>「理解できないフラグ」、
    'ERR03' =>「アニメーション GIF ソースからアニメーションを作成できませんでした」、
    );
    /*
    :::::::::::::::::::::::::::::::::::::::::::::: :
    ::
    :: GIFEncoder...
    ::
    */
    関数 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' ] );
            終了 ( 0 );
        }
        $this->LOP = ( $GIF_lop > -1 ) ? $GIF_lop : 0;
        $this->DIS = ( $GIF_dis > -1 ) ? ( ( $GIF_dis         $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" ), ファイルサイズ ( $GIF_src [ $i ] ) );
            }
            else if ( strToLower ( $GIF_mod ) == "bin" ) {
                $this->BUF [ ] = $GIF_src [ $i ];
            }
            他に{
                printf ( "%s: %s ( %s )!", $this->VER, $this->ERR [ 'ERR02' ], $GIF_mod );
                終了 ( 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' ] );
                終了 ( 0 );
            }
            for ( $j = ( 13 + 3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ) )、 $k = TRUE; $k; $j++ ) {
                switch ( $this->BUF [ $i ] { $j } ) {
                    ケース「!」:
                        if ( ( substr ( $this->BUF [ $i ], ( $j + 3 ), 8 ) ) == "NETSCAPE" ) {
                            printf ( "%s: %s ( %s ソース )!", $this->VER, $this->ERR [ 'ERR03' ], ( $i + 1 ) );
                            終了 ( 0 );
                        }
                        休憩;
                    ケース ";":
                        $k = FALSE;
                        休憩;
                }
            }
        }
        GIFEncoder::GIFAddHeader ( );
        for ( $i = 0; $i BUF ); $i++ ) {
            GIFEncoder::GIFAddFrames ( $i, $GIF_dly [ $i ] );
        }
        GIFEncoder::GIFAddFooter ( );
    }
    /*
    :::::::::::::::::::::::::::::::::::::::::::::: :
    ::
    :: GIFAddHeader...
    ::
    */
    関数 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...
    ::
    */
    関数 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++ ) {
                もし (
                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                     chr ( ( $d >> 0 ) & 0xFF ) 。 chr ( ( $d >> 8 ) & 0xFF ) 。 chr($j) 。 "/x0";
                    休憩;
                }
            }
        }
        スイッチ ( $Locals_tmp { 0 } ) {
            ケース「!」:
                $Locals_img = substr ( $Locals_tmp, 8, 10 );
                $Locals_tmp = substr ( $Locals_tmp, 18, strlen ( $Locals_tmp ) - 18 );
                休憩;
            ケース「、」:
                $Locals_img = substr ( $Locals_tmp, 0, 10 );
                $Locals_tmp = substr ( $Locals_tmp, 10, strlen ( $Locals_tmp ) - 10 );
                休憩;
        }
        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 );
                }
                他に{
                    $byte = ord ( $Locals_img { 9 } );
                    $バイト |= 0x80;
                    $バイト &= 0xF8;
                    $byte |= ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 );
                    $Locals_img { 9 } = chr ( $byte );
                    $this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp );
                }
            }
            他に{
                $byte = ord ( $Locals_img { 9 } );
                $バイト |= 0x80;
                $バイト &= 0xF8;
                $byte |= ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 );
                $Locals_img { 9 } = chr ( $byte );
                $this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp );
            }
        }
        他に{
            $this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp );
        }
        $this->IMG = 1;
    }
    /*
    :::::::::::::::::::::::::::::::::::::::::::::: :
    ::
    :: GIFAddFooter...
    ::
    */
    関数 GIFAddFooter ( ) {
        $this->GIF .= ";";
    }
    /*
    :::::::::::::::::::::::::::::::::::::::::::::: :
    ::
    :: GIFBlockCompare...
    ::
    */
    関数 GIFBlockCompare ( $GlobalBlock, $LocalBlock, $Len ) {
        for ( $i = 0; $i             もし (
            $GlobalBlock { 3 * $i + 0 } != $LocalBlock { 3 * $i + 0 } ||
            $GlobalBlock { 3 * $i + 1 } != $LocalBlock { 3 * $i + 1 } ||
            $GlobalBlock { 3 * $i + 2 } != $LocalBlock { 3 * $i + 2 }
            ){
                リターン ( 0 );
            }
        }
        リターン ( 1 );
    }
    /*
    :::::::::::::::::::::::::::::::::::::::::::::: :
    ::
    :: GIFWord...
    ::
    */
    関数 GIFWord ( $int ) {
        return ( chr ( $int & 0xFF ) . chr ( ( $int >> 8 ) & 0xFF ) );
    }
    /*
    :::::::::::::::::::::::::::::::::::::::::::::: :
    ::
    :: GetAnimation...
    ::
    */
    関数 GetAnimation () {
        return ( $this->GIF );
    }
}
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