將透明圖像合併爲一個使用GD保持透明

Question

我有一個透明的圖像和比圖像更寬的文字，我試圖在透明圖像頂部嵌入文本，並獲得最終透明PNG圖像，我有所產生的透明文本作爲與該寬度和高度的容器，但是當與圖像結合它帶有一個黑色背景

function createImageServer($name, $state) 
{ 
    $path = 'js/FusionCharts/FusionCharts_XT_Website/Charts/Resources/'; 
    $server = $path . 'server' . $state . '.png'; 

    list($width, $height, $type, $attr) = getimagesize($server); 

    $font_path = 'images_machines/FreeSans.ttf'; 

    $bbox = imagettfbbox(10,0,$font_path,$name); 

    $diffHeight = 5; 

    $fontHeight = ($bbox[1] - $bbox[7]) + $diffHeight; 
    $textWidth = $bbox[2] + $bbox[0]; 

    $dstimage = imagecreatetruecolor($textWidth,$height + $fontHeight); 
    imagealphablending($dstimage, false); 

    //Create alpha channel for transparent layer 
    $col=imagecolorallocatealpha($dstimage,255,255,255,127); 
    imagefilledrectangle($dstimage,0,0,$textWidth, $height+$fontHeight,$col); 
    imagealphablending($dstimage,true); 
    imagefttext($dstimage,10,0,0,$fontHeight-$diffHeight,0,$font_path,$name); 


    $srcimage = imagecreatefrompng($server); 
    imagealphablending($srcimage, false); 

    imagecopymerge($dstimage,$srcimage,($textWidth/2)-($width/2),$fontHeight,0,0,$width,$height,100); 
    imagealphablending($dstimage, true); 
    imagesavealpha($dstimage, true); 

    $pathImage = 'images_machines/' . $name . '.png'; 


    imagepng($dstimage,$pathImage); 

    imagedestroy($dstimage); 
    imagedestroy($srcimage); 

    return $pathImage; 
} 

原始圖像：

得到的圖像：

Answer 1

更換您的來電imagecopymerge與imagecopy（改變函數名並刪除最後一個參數）：

//imagecopymerge($dstimage,$srcimage,($textWidth/2)-($width/2),$fontHeight,0,0,$width,$height,100); 

imagecopy($dstimage,$srcimage,($textWidth/2)-($width/2),$fontHeight,0,0,$width,$height); 

結果：