php生成gif动画的方法_php技巧

首先需要确认GD库是否正常，如果是合成图片，请确保把分解的图片放在frames的文件夹里面。
GIFEncoder.class.php 类

"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 COL = ( $GIF_red > -1 && $GIF_grn > -1 && $GIF_blu > -1 ) ? 
                        ( $GIF_red | ( $GIF_grn 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 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 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 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 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 BUF [ 0 ] { 10 } ) & 0x07 ); 
        $Locals_len = 2 BUF [ $i ] { 10 } ) & 0x07 ); 
 
        $Global_rgb = substr ( $this->BUF [ 0 ], 13, 
                            3 * ( 2 BUF [ 0 ] { 10 } ) & 0x07 ) ) ); 
        $Locals_rgb = substr ( $this->BUF [ $i ], 13, 
                            3 * ( 2 BUF [ $i ] { 10 } ) & 0x07 ) ) ); 
 
        $Locals_ext = "!\xF9\x04" . chr ( ( $this->DIS > 0 ) & 0xFF ) . chr ( ( $d >> 8 ) & 0xFF ) . "\x0\x0"; 
 
        if ( $this->COL > -1 && ord ( $this->BUF [ $i ] { 10 } ) & 0x80 ) { 
            for ( $j = 0; $j 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 > 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 > 8 ) & 0xFF ) ); 
    } 
    /* 
    ::::::::::::::::::::::::::::::::::::::::::::::::::: 
    :: 
    ::    GetAnimation... 
    :: 
    */ 
    function GetAnimation ( ) { 
        return ( $this->GIF ); 
    } 
} 
 
?> 

为大家分享两个实例供大家参考：

实例 1 合成gif动画：

GetAnimation ( ) ); 
*/ 
Header ( 'Content-type:image/gif' ); 
echo  $gif->GetAnimation ( ); 
?> 

实例 2 创建gif动画：

 $game_width){ 
        $xv = -1*$xv; 
        $x = $game_width - ($x-$game_width); 
    }elseif($x $game_height){ 
        $yv = -1*$yv; 
        $y = $game_height - ($y - $game_height); 
    }elseif($yGetAnimation(); 
?> 

以上就是教大家如何利用php合成或是创建gif动画，希望大家仔细研究分享的两个实例，有所收获。