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在php中如何输出动态gif

时间：2021-07-01 10:21:17 帮助过：3人阅读

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。

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GIFEncoder.class.php 类

  1. <?  
  2. Class GIFEncoder { 
  3.     var $GIF = "GIF89a";        /* GIF header 6 bytes    */
  4.     var $VER = "GIFEncoder V2.06";    /* Encoder version        */
  5.   
  6.     var $BUF = Array ( ); 
  7.     var $LOP = 0; 
  8.     var $DIS = 2; 
  9.     var $COL = -1; 
  10.     var $IMG = -1; 
  11.   
  12.     var $ERR = Array ( 
  13.         'ERR00' =>"Does not supported function for only one image!", 
  14.         'ERR01' =>"Source is not a GIF image!", 
  15.         'ERR02' =>"Unintelligible flag ", 
  16.         'ERR03' =>"Could not make animation from animated GIF source", 
  17.     ); 
  18.   
  19.     /* 
  20.     ::::::::::::::::::::::::::::::::::::::::::::::::::: 
  21.     :: 
  22.     ::    GIFEncoder... 
  23.     :: 
  24.     */
  25.     function GIFEncoder    ( 
  26.                             $GIF_src, $GIF_dly, $GIF_lop, $GIF_dis, 
  27.                             $GIF_red, $GIF_grn, $GIF_blu, $GIF_mod
  28.                         ) { 
  29.         if ( ! is_array ( $GIF_src ) && ! is_array ( $GIF_tim ) ) { 
  30.             printf    ( "%s: %s", $this->VER, $this->ERR [ 'ERR00' ] ); 
  31.             exit    ( 0 ); 
  32.         } 
  33.         $this->LOP = ( $GIF_lop > -1 ) ? $GIF_lop : 0; 
  34.         $this->DIS = ( $GIF_dis > -1 ) ? ( ( $GIF_dis < 3 ) ? $GIF_dis : 3 ) : 2; 
  35.         $this->COL = ( $GIF_red > -1 && $GIF_grn > -1 && $GIF_blu > -1 ) ? 
  36.                         ( $GIF_red | ( $GIF_grn << 8 ) | ( $GIF_blu << 16 ) ) : -1; 
  37.   
  38.         for ( $i = 0; $i < count ( $GIF_src ); $i++ ) { 
  39.             if ( strToLower ( $GIF_mod ) == "url" ) { 
  40.                 $this->BUF [ ] = fread ( fopen ( $GIF_src [ $i ], "rb" ), filesize ( $GIF_src [ $i ] ) ); 
  41.             } 
  42.             else if ( strToLower ( $GIF_mod ) == "bin" ) { 
  43.                 $this->BUF [ ] = $GIF_src [ $i ]; 
  44.             } 
  45.             else { 
  46.                 printf    ( "%s: %s ( %s )!", $this->VER, $this->ERR [ 'ERR02' ], $GIF_mod ); 
  47.                 exit    ( 0 ); 
  48.             } 
  49.             if ( substr ( $this->BUF [ $i ], 0, 6 ) != "GIF87a" && substr ( $this->BUF [ $i ], 0, 6 ) != 
  50.             "GIF89a" ) { 
  51.                 printf    ( "%s: %d %s", $this->VER, $i, $this->ERR [ 'ERR01' ] ); 
  52.                 exit    ( 0 ); 
  53.             } 
  54.             for ( $j = ( 13 + 3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ) ), $k = TRUE; $k; $j++ ) 
  55.             { 
  56.                 switch ( $this->BUF [ $i ] { $j } ) { 
  57.                     case "!": 
  58.                         if ( ( substr ( $this->BUF [ $i ], ( $j + 3 ), 8 ) ) == "NETSCAPE" ) { 
  59.                             printf    ( "%s: %s ( %s source )!", $this->VER, $this->ERR [ 'ERR03' ], 
  60.                             ( $i + 1 ) ); 
  61.                             exit    ( 0 ); 
  62.                         } 
  63.                         break; 
  64.                     case ";": 
  65.                         $k = FALSE; 
  66.                         break; 
  67.                 } 
  68.             } 
  69.         } 
  70.         GIFEncoder::GIFAddHeader ( ); 
  71.         for ( $i = 0; $i < count ( $this->BUF ); $i++ ) { 
  72.             GIFEncoder::GIFAddFrames ( $i, $GIF_dly [ $i ] ); 
  73.         } 
  74.         GIFEncoder::GIFAddFooter ( ); 
  75.     } 
  76.     /* 
  77.     ::::::::::::::::::::::::::::::::::::::::::::::::::: 
  78.     :: 
  79.     ::    GIFAddHeader... 
  80.     :: 
  81.     */
  82.     function GIFAddHeader ( ) { 
  83.         $cmap = 0; 
  84.   
  85.         if ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x80 ) { 
  86.             $cmap = 3 * ( 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 ) ); 
  87.   
  88.             $this->GIF .= substr ( $this->BUF [ 0 ], 6, 7        ); 
  89.             $this->GIF .= substr ( $this->BUF [ 0 ], 13, $cmap    ); 
  90.             $this->GIF .= "!\377\13NETSCAPE2.0\3\1" . GIFEncoder::GIFWord ( $this->LOP ) . "\0"; 
  91.         } 
  92.     } 
  93.     /* 
  94.     ::::::::::::::::::::::::::::::::::::::::::::::::::: 
  95.     :: 
  96.     ::    GIFAddFrames... 
  97.     :: 
  98.     */
  99.     function GIFAddFrames ( $i, $d ) { 
  100.   
  101.         $Locals_str = 13 + 3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ); 
  102.   
  103.         $Locals_end = strlen ( $this->BUF [ $i ] ) - $Locals_str - 1; 
  104.         $Locals_tmp = substr ( $this->BUF [ $i ], $Locals_str, $Locals_end ); 
  105.   
  106.         $Global_len = 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 ); 
  107.         $Locals_len = 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ); 
  108.   
  109.         $Global_rgb = substr ( $this->BUF [ 0 ], 13, 
  110.                             3 * ( 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 ) ) ); 
  111.         $Locals_rgb = substr ( $this->BUF [ $i ], 13, 
  112.                             3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ) ); 
  113.   
  114.         $Locals_ext = "!\xF9\x04" . chr ( ( $this->DIS << 2 ) + 0 ) . 
  115.                         chr ( ( $d >> 0 ) & 0xFF ) . chr ( ( $d >> 8 ) & 0xFF ) . "\x0\x0"; 
  116.   
  117.         if ( $this->COL > -1 && ord ( $this->BUF [ $i ] { 10 } ) & 0x80 ) { 
  118.             for ( $j = 0; $j < ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ); $j++ ) { 
  119.                 if    ( 
  120.                         ord ( $Locals_rgb { 3 * $j + 0 } ) == ( $this->COL >> 0 ) & 0xFF && 
  121.                         ord ( $Locals_rgb { 3 * $j + 1 } ) == ( $this->COL >> 8 ) & 0xFF && 
  122.                         ord ( $Locals_rgb { 3 * $j + 2 } ) == ( $this->COL >> 16 ) & 0xFF 
  123.                     ) { 
  124.                     $Locals_ext = "!\xF9\x04" . chr ( ( $this->DIS << 2 ) + 1 ) . 
  125.                                     chr ( ( $d >> 0 ) & 0xFF ) . chr ( ( $d >> 8 ) & 0xFF ) . 
  126.                                     chr ( $j ) . "\x0"; 
  127.                     break; 
  128.                 } 
  129.             } 
  130.         } 
  131.         switch ( $Locals_tmp { 0 } ) { 
  132.             case "!": 
  133.                 $Locals_img = substr ( $Locals_tmp, 8, 10 ); 
  134.                 $Locals_tmp = substr ( $Locals_tmp, 18, strlen ( $Locals_tmp ) - 18 ); 
  135.                 break; 
  136.             case ",": 
  137.                 $Locals_img = substr ( $Locals_tmp, 0, 10 ); 
  138.                 $Locals_tmp = substr ( $Locals_tmp, 10, strlen ( $Locals_tmp ) - 10 ); 
  139.                 break; 
  140.         } 
  141.         if ( ord ( $this->BUF [ $i ] { 10 } ) & 0x80 && $this->IMG > -1 ) { 
  142.             if ( $Global_len == $Locals_len ) { 
  143.                 if ( GIFEncoder::GIFBlockCompare ( $Global_rgb, $Locals_rgb, $Global_len ) ) { 
  144.                     $this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp ); 
  145.                 } 
  146.                 else { 
  147.                     $byte = ord ( $Locals_img { 9 } ); 
  148.                     $byte |= 0x80; 
  149.                     $byte &= 0xF8; 
  150.                     $byte |= ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 ); 
  151.                     $Locals_img { 9 } = chr ( $byte ); 
  152.                     $this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp ); 
  153.                 } 
  154.             } 
  155.             else { 
  156.                 $byte = ord ( $Locals_img { 9 } ); 
  157.                 $byte |= 0x80; 
  158.                 $byte &= 0xF8; 
  159.                 $byte |= ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ); 
  160.                 $Locals_img { 9 } = chr ( $byte ); 
  161.                 $this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp ); 
  162.             } 
  163.         } 
  164.         else { 
  165.             $this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp ); 
  166.         } 
  167.         $this->IMG = 1; 
  168.     } 
  169.     /* 
  170.     ::::::::::::::::::::::::::::::::::::::::::::::::::: 
  171.     :: 
  172.     ::    GIFAddFooter... 
  173.     :: 
  174.     */
  175.     function GIFAddFooter ( ) { 
  176.         $this->GIF .= ";"; 
  177.     } 
  178.     /* 
  179.     ::::::::::::::::::::::::::::::::::::::::::::::::::: 
  180.     :: 
  181.     ::    GIFBlockCompare... 
  182.     :: 
  183.     */
  184.     function GIFBlockCompare ( $GlobalBlock, $LocalBlock, $Len ) { 
  185.   
  186.         for ( $i = 0; $i < $Len; $i++ ) { 
  187.             if    ( 
  188.                     $GlobalBlock { 3 * $i + 0 } != $LocalBlock { 3 * $i + 0 } || 
  189.                     $GlobalBlock { 3 * $i + 1 } != $LocalBlock { 3 * $i + 1 } || 
  190.                     $GlobalBlock { 3 * $i + 2 } != $LocalBlock { 3 * $i + 2 } 
  191.                 ) { 
  192.                     return ( 0 ); 
  193.             } 
  194.         } 
  195.   
  196.         return ( 1 ); 
  197.     } 
  198.     /* 
  199.     ::::::::::::::::::::::::::::::::::::::::::::::::::: 
  200.     :: 
  201.     ::    GIFWord... 
  202.     :: 
  203.     */
  204.     function GIFWord ( $int ) { 
  205.   
  206.         return ( chr ( $int & 0xFF ) . chr ( ( $int >> 8 ) & 0xFF ) ); 
  207.     } 
  208.     /* 
  209.     ::::::::::::::::::::::::::::::::::::::::::::::::::: 
  210.     :: 
  211.     ::    GetAnimation... 
  212.     :: 
  213.     */
  214.     function GetAnimation ( ) { 
  215.         return ( $this->GIF ); 
  216.     } 
  217. } 
  218.   
  219. ?>

为大家分享两个实例供大家参考：

实例 1 合成gif动画：

  1. <?php 
  2. include "GIFEncoder.class.php"; 
  3. /* 
  4.   Build a frames array from sources... 
  5. */
  6. if ( $dh = opendir ( "frames/" ) ) { 
  7.   while ( false !== ( $dat = readdir ( $dh ) ) ) { 
  8.     if ( $dat != "." && $dat != ".." ) { 
  9.       $frames [ ] = "frames/$dat"; 
  10.       $framed [ ] = 5; 
  11.     } 
  12.   } 
  13.   closedir ( $dh ); 
  14. } 
  15. /* 
  16.     GIFEncoder constructor: 
  17.     ======================= 
  18.   
  19.     image_stream = new GIFEncoder  ( 
  20.               URL or Binary data 'Sources' 
  21.               int         'Delay times' 
  22.               int         'Animation loops' 
  23.               int         'Disposal' 
  24.               int         'Transparent red, green, blue colors' 
  25.               int         'Source type' 
  26.             ); 
  27. */
  28. $gif = new GIFEncoder  ( 
  29.       $frames, 
  30.       $framed, 
  31.       0, 
  32.       2, 
  33.       0, 0, 0, 
  34.       "url"
  35.     ); 
  36. /* 
  37.     Possibles outputs: 
  38.     ================== 
  39.   
  40.     Output as GIF for browsers : 
  41.       - Header ( 'Content-type:image/gif' ); 
  42.     Output as GIF for browsers with filename: 
  43.       - Header ( 'Content-disposition:Attachment;filename=myanimation.gif'); 
  44.     Output as file to store into a specified file: 
  45.       - FWrite ( FOpen ( "myanimation.gif", "wb" ), $gif->GetAnimation ( ) ); 
  46. */
  47. Header ( 'Content-type:image/gif' ); 
  48. echo  $gif->GetAnimation ( ); 
  49. ?>

实例 2 创建gif动画：

  1. <?php 
  2. include "GIFEncoder.class.php"; 
  3.   
  4. ob_start(); 
  5. $board_width = 60; 
  6. $board_height = 60; 
  7. $pad_width = 5; 
  8. $pad_height = 15; 
  9. $ball_size = 5; 
  10. $game_width = $board_width - $pad_width*2 - $ball_size; 
  11. $game_height = $board_height-$ball_size; 
  12.   
  13. $x = 0; 
  14. $y = rand(0,$game_height); 
  15. $xv = rand(1,10); 
  16. $yv = rand(1,10); 
  17. $pt[] = array($x,$y); 
  18. do{ 
  19.     $x += $xv; 
  20.     $y += $yv; 
  21.     if($x > $game_width){ 
  22.         $xv = -1*$xv; 
  23.         $x = $game_width - ($x-$game_width); 
  24.     }elseif($x < 0){ 
  25.         $xv = -1*$xv; 
  26.         $x = abs($x); 
  27.     } 
  28.     if($y>$game_height){ 
  29.         $yv = -1*$yv; 
  30.         $y = $game_height - ($y - $game_height); 
  31.     }elseif($y<0){ 
  32.         $yv = -1*$yv; 
  33.         $y = abs($y); 
  34.     } 
  35.     $pt[] = array($x,$y); 
  36. }while($x!=$pt[0][0]||$y!=$pt[0][1]); 
  37.   
  38. $i = 0; 
  39. while(isset($pt[$i])){ 
  40.     $image = imagecreate($board_width,$board_height); 
  41.     imagecolorallocate($image, 0,0,0); 
  42.     $color = imagecolorallocate($image, 255,255,255); 
  43.     $color2 = imagecolorallocate($image, 255,0,0); 
  44.       
  45.     if($pt[$i][1] + $pad_height < $board_width){ 
  46.         imagefilledrectangle($image,0,$pt[$i][1],$pad_width, $pt[$i][1]+$pad_height,$color); 
  47.     }else{ 
  48.         imagefilledrectangle($image,0,$board_width-$pad_height,$pad_width, $board_width,$color); 
  49.     } 
  50.     imagefilledrectangle($image,$board_width-$pad_width,0,$board_width, $board_height,$color2); 
  51.     imagefilledrectangle($image,$pad_width+$pt[$i][0], $ball_size+$pt[$i][1]-$ball_size, $pad_width+$pt[$i][0]+
  52.     $ball_size, $ball_size+$pt[$i][1],$color); 
  53.     //imagesetpixel($image,$pt[$i][0],$pt[$i][1],$color); 
  54.     imagegif($image); 
  55.     imagedestroy($image); 
  56.     $imagedata[] = ob_get_contents(); 
  57.     ob_clean(); 
  58.     ++$i; 
  59. } 
  60.   
  61. $gif = new GIFEncoder( 
  62.               $imagedata, 
  63.               100, 
  64.               0, 
  65.               2, 
  66.               0, 0, 1, 
  67.               "bin"
  68.     ); 
  69.       
  70. Header ('Content-type:image/gif'); 
  71. echo $gif->GetAnimation(); 
  72. ?>

以上就是在php中如何输出动态gif的详细内容，更多请关注Gxl网其它相关文章！

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