PHP 小程式碼中心圖片更換LOGO
阿新 • • 發佈:2020-10-20
/** * 將小程式碼與LOGO合併 */ public function imageMerge($bgimg, $logoimg) { $path = ROOT_PATH.'public/uploads/'; //原小程式碼 背景圖 $bgimg = $path.$bgimg; //LOGO 需要插入到背景圖的圖片url $logoimg = $path.$logoimg; if ($bgimg) { //這是合成後的圖片儲存的路徑 $upload_dir = "public/uploads/wechat/"; if (is_file($bgimg)) { //建立畫布 $bg = imagecreatefromstring(file_get_contents($bgimg)); $logo = $this->yuan_img($logoimg); //將$logoimg插入到$bgimg裡 imagecopyresampled($bg, $logo, 166, 166, 0, 0, 268, 268, imagesx($logo), imagesy($logo)); //生成圖片 $img_name = md5($bgimg.$logoimg.time().rand(100000,999999)).'.png'; imagepng($bg, ROOT_PATH.$upload_dir.$img_name); //生成圖片名字 $twocode = 'wechat/'.$img_name; //如果存在logo就生成帶logo的 }//刪除原小程式碼 unlink($bgimg); return $twocode;//返回結果圖片url } else { return false; } } /** * 圖片轉換為圓形 */ public function yuan_img($imgpath) { $ext = pathinfo($imgpath); $src_img = null; switch ($ext['extension']) { case 'jpg': $src_img = imagecreatefromjpeg($imgpath); break; case 'png': $src_img = imagecreatefrompng($imgpath); break; case 'gif': $src_img = imagecreatefromgif($imgpath); break; } $wh = getimagesize($imgpath); $w = $wh[0]; $h = $wh[1]; $min = min($w, $h); $img = imagecreatetruecolor($min, $min); //這一句一定要有 imagesavealpha($img, true); //拾取一個完全透明的顏色,最後一個引數127為全透明 $bg = imagecolorallocatealpha($img, 255, 255, 255, 127); imagefill($img, 0, 0, $bg); $r = $min / 2; //圓半徑 for ($x = $w/2 - $r; $x < $w; $x++) { for ($y = $h/2 - $r; $y < $h; $y++) { $rgbColor = imagecolorat($src_img, $x, $y); $y_x = $w/2; //圓心X座標 $y_y = $h/2; //圓心Y座標 if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))){ imagesetpixel($img, $x - ($w/2 - $r), $y - ($h/2 - $r), $rgbColor); } } } return $img; }