PHP converts BMP images to JPG images and other images in any format

CopyCode The Code is as follows: <? PHP
// Example:
$ Path = root. 'upload/2009/06/03/124401282315771 .';
$ Pathall = $ path. 'bmp ';
$ MI = '';
$ MI = imagecreatefrombmp ($ pathall );
Imagejpeg ($ Mi, $ path. 'jpg ');
// The function is as follows:
Function imagecreatefrombmp ($ filename)
{
// OUVERTURE du fichier en mode binaire
If (! $ F1 = fopen ($ filename, "rb") return false;
// 1: chargement des ent �tes fichier
$ File = unpack ("vfile_type/vfile_size/vreserved/vbitmap_offset", fread ($ F1, 14 ));
If ($ file ['file_type ']! = 19778) return false;
// 2: chargement des ent �tes BMP
$ BMP = unpack ('vheader_size/vwidth/vheight/vplanes/vbits_per_pixel '.
'/Vcompression/vsize_bitmap/vhoriz_resolution '.
'/Vvert_resolution/vcolors_used/vcolors_important', fread ($ F1, 40 ));
$ BMP ['color'] = POW (2, $ BMP ['bits_per_pixel ']);
If ($ BMP ['size_bitmap'] = 0) $ BMP ['size_bitmap'] = $ file ['file_size ']-$ file ['bitmap_offset'];
$ BMP ['bytes_per_pixel '] = $ BMP ['bits_per_pixel']/8;
$ BMP ['bytes_per_pixel2 '] = Ceil ($ BMP ['bytes_per_pixel']);
$ BMP ['desc'] = ($ BMP ['width'] * $ BMP ['bytes_per_pixel ']/4 );
$ BMP ['desc']-= floor ($ BMP ['width'] * $ BMP ['bytes_per_pixel ']/4 );
$ BMP ['Demo'] = 4-(4 * $ BMP ['Demo']);
If ($ BMP ['Demo'] = 4) $ BMP ['Demo'] = 0;
// 3: chargement des couleurs de la palette
$ Palette = array ();
If ($ BMP ['colors '] <16777216)
{
$ Palette = unpack ('V'. $ BMP ['colors '], fread ($ F1, $ BMP ['colors'] * 4 ));
}
// 4: CR �ation de l' Image
$ IMG = fread ($ F1, $ BMP ['size_bitmap']);
$ Vide = CHR (0 );
$ Res = imagecreatetruecolor ($ BMP ['width'], $ BMP ['height']);
$ P = 0;
$ Y = $ BMP ['height']-1;
While ($ Y> = 0)
{
$ X = 0;
While ($ x <$ BMP ['width'])
{
If ($ BMP ['bits_per_pixel '] = 24)
$ Color = unpack ("V", substr ($ IMG, $ P, 3). $ vide );
Elseif ($ BMP ['bits_per_pixel '] = 16)
{
$ Color = unpack ("N", substr ($ IMG, $ P, 2 ));
$ Color [1] = $ palette [$ color [1] + 1];
}
Elseif ($ BMP ['bits_per_pixel '] = 8)
{
$ Color = unpack ("N", $ vide. substr ($ IMG, $ P, 1 ));
$ Color [1] = $ palette [$ color [1] + 1];
}
Elseif ($ BMP ['bits_per_pixel '] = 4)
{
$ Color = unpack ("N", $ vide. substr ($ IMG, floor ($ P), 1 ));
If ($ p * 2) % 2 = 0) $ color [1] = ($ color [1]> 4 ); else $ color [1] = ($ color [1] & 0x0f );
$ Color [1] = $ palette [$ color [1] + 1];
}
Elseif ($ BMP ['bits_per_pixel '] = 1)
{
$ Color = unpack ("N", $ vide. substr ($ IMG, floor ($ P), 1 ));
If ($ p * 8) % 8 = 0) $ color [1] = $ color [1]> 7;
Elseif ($ p * 8) % 8 = 1) $ color [1] = ($ color [1] & 0x40)> 6;
Elseif ($ p * 8) % 8 = 2) $ color [1] = ($ color [1] & 0x20)> 5;
Elseif ($ p * 8) % 8 = 3) $ color [1] = ($ color [1] & 0x10)> 4;
Elseif ($ p * 8) % 8 = 4) $ color [1] = ($ color [1] & 0x8)> 3;
Elseif ($ p * 8) % 8 = 5) $ color [1] = ($ color [1] & 0x4)> 2;
Elseif ($ p * 8) % 8 = 6) $ color [1] = ($ color [1] & 0x2)> 1;
Elseif ($ p * 8) % 8 = 7) $ color [1] = ($ color [1] & 0x1 );
$ Color [1] = $ palette [$ color [1] + 1];
}
Else
Return false;
Imagesetpixel ($ res, $ X, $ y, $ color [1]);
$ X ++;
$ P + = $ BMP ['bytes_per_pixel '];
}
$ Y --;
$ P + = $ BMP ['Demo'];
}
// Fermeture du fichier
Fclose ($ F1 );
Return $ res;
}
?>