[Huang Ah Code] One-time clarification thinkphp adds watermark to pictures

Hello everyone, I am Huang Ahma, and today I will tell you how to add watermarks to pictures in tp.

Before this, I tried it myself, adding text directly to the picture, but it backfired, and there would always be garbled characters, no matter how I set it, it would not work, unless I set the font, but the font is most afraid of copyright issues or incompatibility, so I am rough and add image watermark directly on the image.

Not much nonsense, just go to the code

/**
     * @param $sourcePath
     * @param $logoPath
     * @param $savePath
     * 给图片加水印
     */
    function addImageWater($sourcePath,$logoPath,$savePath){

        $img_info =  getimagesize($sourcePath);

        $im = null;
        
        if($img_info[2]==3){
            $im = imagecreatefrompng($sourcePath);
        }else{
            $im = imagecreatefromjpeg($sourcePath);
        }
        $watermark = imagecreatefrompng($logoPath);
        //获取图、水印 宽高类型
        list($bgWidth, $bgHight, $bgType) = getimagesize($sourcePath);
        list($logoWidth, $logoHight, $logoType) = getimagesize($logoPath);
        //定义平铺数据
        $x_length = $bgWidth-10; //x轴总长度
        $y_le