function pngMerge($o_pic,$out_pic){ $begin_r = 255; $begin_g = 250; $begin_b = 250; list($src_w, $src_h) = getimagesize($o_pic);// 獲取原圖像信息 寬高 $src_im = imagecreatefrompng($o_pic); //讀取png圖片 print_r($src_im); imagesavealpha($src_im,true);//這里很重要 意思是不要丟了$src_im圖像的透明色 $src_white = imagecolorallocatealpha($src_im, 255, 255, 255,127); // 創建一副白色透明的畫布 for ($x = 0; $x < $src_w; $x++) {  for ($y = 0; $y < $src_h; $y++) {    $rgb = imagecolorat($src_im, $x, $y);    $r = ($rgb >> 16) & 0xFF;    $g = ($rgb >> 8) & 0xFF;    $b = $rgb & 0xFF;    if($r==255 && $g==255 && $b == 255){    imagefill($src_im,$x, $y, $src_white); //填充某個點的顏色    imagecolortransparent($src_im, $src_white); //將原圖顏色替換為透明色    }    if (!($r <= $begin_r && $g <= $begin_g && $b <= $begin_b)) {     imagefill($src_im, $x, $y, $src_white);//替換成白色     imagecolortransparent($src_im, $src_white); //將原圖顏色替換為透明色    }  } } $target_im = imagecreatetruecolor($src_w, $src_h);//新圖 imagealphablending($target_im,false);//這里很重要,意思是不合并顏色,直接用$target_im圖像顏色替換,包括透明色; imagesavealpha($target_im,true);//這里很重要,意思是不要丟了$target_im圖像的透明色; $tag_white = imagecolorallocatealpha($target_im, 255, 255, 255,127);//把生成新圖的白色改為透明色 存為tag_white imagefill($target_im, 0, 0, $tag_white);//在目標新圖填充空白色 imagecolortransparent($target_im, $tag_white);//替換成透明色 imagecopymerge($target_im, $src_im, 0, 0, 0, 0, $src_w, $src_h, 100);//合并原圖和新生成的透明圖 imagepng($target_im,$out_pic); return $out_pic;}$o_pic = '1.png';$name = pngMerge($o_pic,'aaaa.png');print_r($name);

$o_pic = '1.jpg';//要處理的色階起始值$begin_r = 215;$begin_g = 215;$begin_b = 215;list($src_w,$src_h,$src_type) = getimagesize($o_pic);// 獲取原圖像信息$file_ext = get_ext($o_pic);//獲取擴展名$target_im = imagecreatetruecolor($src_w,$src_h);//新圖if($file_ext == 'jpg') //轉換JPG 開始{  $src_im = ImageCreateFromJPEG($o_pic);  imagecopymerge($target_im,$src_im,0,0,0,0,$src_w,$src_h,100);  for($x = 0; $x < $src_w; $x++)  {    for($y = 0; $y < $src_h; $y++)    {      $rgb = imagecolorat($src_im, $x, $y);      $r = ($rgb >> 16) & 0xFF;      $g = ($rgb >> 8) & 0xFF;      $b = $rgb & 0xFF;      if($r > $begin_r && $g > $begin_g && $b > $begin_b ){          imagecolortransparent($target_im, imagecolorallocate($target_im,$r, $g, $b));              }    }  }}

$begin_r = 98;$begin_g = 98;$begin_b = 98;list($src_w, $src_h) = getimagesize($o_pic);// 獲取原圖像信息$src_im = imagecreatefromjpeg($o_pic);//imagecopymerge($target_im, $src_im, 0, 0, 0, 0, $src_w, $src_h, 100);//imagecopyresampled($target_im, $src_im, 0, 0, 0, 0, $src_w, $src_h, $src_w, $src_h);$i = 0;$src_white = imagecolorallocate($src_im, 255, 255, 255);for ($x = 0; $x < $src_w; $x++) {  for ($y = 0; $y < $src_h; $y++) {   $rgb = imagecolorat($src_im, $x, $y);   $r = ($rgb >> 16) & 0xFF;   $g = ($rgb >> 8) & 0xFF;   $b = $rgb & 0xFF;   if($r==255 && $g==255 && $b == 255){     $i ++;     continue;   }   if (!($r <= $begin_r && $g <= $begin_g && $b <= $begin_b)) {     imagefill($src_im, $x, $y, $src_white);//替換成白色   }  }}$target_im = imagecreatetruecolor($src_w, $src_h);//新圖$tag_white = imagecolorallocate($target_im, 255, 255, 255);imagefill($target_im, 0, 0, $tag_white);imagecolortransparent($target_im, $tag_white);imagecopymerge($target_im, $src_im, 0, 0, 0, 0, $src_w, $src_h, 100);