我使用在线代码（https://github.com/hm2k/hm2k-php/blob/master/functions/imagecreatefrombmp.php）将“BMP”转换为“JPG”;我输入了一个单独的文件（在包含库中），如下所示：
class bmp2jpg {
/**
* @convert BMP to GD
* @param string $src
* @param string|bool $dest
* @return bool
*/
public static function bmp2gd($src, $dest = false) {
// open source file for reading
if (!($srch = fopen($src, 'rb'))) {
user_error('Unable to open source for reading.');
return false;
}
// open the destination file for writing
if (!($desth = fopen($dest, 'wb'))) {
user_error('Unable to open destination for writing.');
return false;
}
// get the headers
$header = unpack('vtype/Vsize/v2reserved/Voffset', fread($srch, 14));
// get the rest of the image
$info = unpack('Vsize/Vwidth/Vheight/vplanes/vbits/Vcompression/Vimagesize/Vxres/Vyres/Vncolor/Vimportant', fread($srch, 40));
// extract the header and info into varibles
extract($info);
extract($header);
// check for BMP signature
if ($type != 0x4D42) {
user_error('Source image is not a BMP.');
return false;
}
// set the pallete
$palette_size = $offset - 54;
$ncolor = $palette_size / 4;
// true-color vs. palette
$gd_header = '';
$gd_header .= ($palette_size == 0) ? "\xFF\xFE" : "\xFF\xFF";
$gd_header .= pack('n2', $width, $height);
$gd_header .= ($palette_size == 0) ? "\x01" : "\x00";
if ($palette_size) {
$gd_header .= pack('n', $ncolor);
}
// do not allow transparency
$gd_header .= "\xFF\xFF\xFF\xFF";
// write the destination headers
fwrite($desth, $gd_header);
unset($gd_header);
// if we have a palette
if ($palette_size) {
// read the palette
$palette = fread($srch, $palette_size);
// begin the gd palette
$gd_palette = '';
$j = 0;
// loop of the palette
while ( $j < $palette_size ) {
$b = $palette{$j++};
$g = $palette{$j++};
$r = $palette{$j++};
$a = $palette{$j++};
// assemble the gd palette
$gd_palette .= $r . $g . $b . $a;
}
// finish the palette
$gd_palette .= str_repeat("\x00\x00\x00\x00", 256 - $ncolor);
// write the gd palette
fwrite($desth, $gd_palette);
unset($gd_palette);
}
// scan line size and alignment
$scan_line_size = (($bits * $width) + 7) >> 3;
$scan_line_align = ($scan_line_size & 0x03) ? 4 - ($scan_line_size & 0x03) : 0;
// main loop
for($i = 0, $l = $height - 1; $i < $height; $i++, $l--) {
// create scan lines starting from bottom
fseek($srch, $offset + (($scan_line_size + $scan_line_align) * $l));
$scan_line = fread($srch, $scan_line_size);
$gd_scan_line = '';
if ($bits == 24) {
$j = 0;
while ( $j < $scan_line_size ) {
$b = $scan_line{$j++};
$g = $scan_line{$j++};
$r = $scan_line{$j++};
$gd_scan_line .= "\x00" . $r . $g . $b;
}
}
else if ($bits == 8) {
$gd_scan_line = $scan_line;
}
else if ($bits == 4) {
$j = 0;
while ( $j < $scan_line_size ) {
$byte = ord($scan_line{$j++});
$p1 = chr($byte >> 4);
$p2 = chr($byte & 0x0F);
$gd_scan_line .= $p1 . $p2;
}
$gd_scan_line = substr($gd_scan_line, 0, $width);
}
else if ($bits == 1) {
$j = 0;
while ( $j < $scan_line_size ) {
$byte = ord($scan_line{$j++});
$p1 = chr((int)(($byte & 0x80) != 0));
$p2 = chr((int)(($byte & 0x40) != 0));
$p3 = chr((int)(($byte & 0x20) != 0));
$p4 = chr((int)(($byte & 0x10) != 0));
$p5 = chr((int)(($byte & 0x08) != 0));
$p6 = chr((int)(($byte & 0x04) != 0));
$p7 = chr((int)(($byte & 0x02) != 0));
$p8 = chr((int)(($byte & 0x01) != 0));
$gd_scan_line .= $p1 . $p2 . $p3 . $p4 . $p5 . $p6 . $p7 . $p8;
}
// put the gd scan lines together
$gd_scan_line = substr($gd_scan_line, 0, $width);
}
// write the gd scan lines
fwrite($desth, $gd_scan_line);
unset($gd_scan_line);
}
// close the source file
fclose($srch);
// close the destination file
fclose($desth);
// return destination file
return $dest;
}
/**
* @ceate a BMP image
* @param string $filename
* @return bin string on success
* @return bool false on failure
*/
public static function imagecreatefrombmp($filename) {
// create a temp file
$tmpfile = tempnam(sys_get_temp_dir(), 'gd');
// convert to gd
if (bmp2gd($filename, $tmpfile)) {
// create image resource
$img = imagecreatefromgd($tmpfile);
}
// remove temp file
@unlink($tmpfile);
return isset($img) ? $img : false;
}
}
我用这种方式调用函数：
require_once ("..\includes\imagecreatefrombmp.php");
$GD_Employee = bmp2jpg::bmp2gd("..\img\Rep.bmp");
$dest=bmp2jpg::imagecreatefrombmp($GD_Employee);
但它给了我以下错误：
Warning: require_once(..\includes\imagecreatefrombmp.php): failed to open stream
Fatal error: require_once(): Failed opening required '..\includes\imagecreatefrombmp.php'
由于
答案 0 :(得分：3)
因为它找不到imagecreatefrombmp.php ...检查它是否在正确的目录中，它从第一次运行php文件算起。