phpoffice/phpspreadsheet读取excel表格中的图片并保存到本地

我们开发导入excel表格功能时，会遇到表格中带有图片的情况，怎样获取到表格的图片并且把图片保存到本地，这样就可以展示你导入的数据和图片，实现此功能。
这里介绍一下分别使用phpspreadsheet和PHPExcel扩展库来实现读取Excel内图片的功能：
表格是这样的。
开始使用
首先安装phpspreadsheet到你的项目里，在项目根目录下使用composer安装，命令如下：

composer require phpoffice/phpspreadsheet

部分代码：

use PhpOffice\PhpSpreadsheet\IOFactory;
use PhpOffice\PhpSpreadsheet\Cell\Coordinate;


// 获取excel表格的图片
	public function readexcel1()
	{
		$imageFilePath = ROOT_PATH . 'public/uploads/imgs/'; //图片本地存储的路径
		if (!file_exists($imageFilePath)) { //如果目录不存在则递归创建
		 	mkdir($imageFilePath, 0777, true);
		}
		try {
			$file = ROOT_PATH . 'public/excel/2.xlsx';; //包含图片的Excel文件
			$objRead = IOFactory::createReader('Xlsx');
			$objSpreadsheet = $objRead->load($file);
			$objWorksheet = $objSpreadsheet->getSheet(0);
			$data = $objWorksheet->toArray();
			foreach ($objWorksheet->getDrawingCollection() as $drawing) {
				list($startColumn, $startRow) = Coordinate::coordinateFromString($drawing->getCoordinates());
				$imageFileName = $drawing->getCoordinates() . mt_rand(1000, 9999);
				switch ($drawing->getExtension()) {
					case 'jpg':
					case 'jpeg':
						$imageFileName .= '.jpg';
						$source = imagecreatefromjpeg($drawing->getPath());
						imagejpeg($source, $imageFilePath . $imageFileName);
						break;
					case 'gif':
						$imageFileName .= '.gif';
						$source = imagecreatefromgif($drawing->getPath());
						imagegif($source, $imageFilePath . $imageFileName);
						break;
					case 'png':
						$imageFileName .= '.png';
						$source = imagecreatefrompng($drawing->getPath());
						imagepng($source, $imageFilePath . $imageFileName);
						break;
				}
				$data[$startRow-1][$startColumn] = '/uploads/imgs/' . $imageFileName;
			}
			dump($data);die();
		} catch (\Exception $e) {
		 	throw $e;
		}
	}

输出表格的数据：

		array(3) {
			  [0] => array(3) {
			    [0] => string(6) "编码"
			    [1] => string(6) "名称"
			    [2] => string(6) "图片"
			  }
			  [1] => array(4) {
			    [0] => string(4) "B101"
			    [1] => string(9) "票据夹"
			    [2] => NULL
			    ["C"] => string(25) "./uploads/imgs/C26829.png"
			  }
			  [2] => array(4) {
			    [0] => string(4) "B102"
			    [1] => string(6) "油笔"
			    [2] => NULL
			    ["C"] => string(25) "./uploads/imgs/C39403.png"
			  }
			}

图片在第三列也就是C列，但是这样的数据不方便保存到数据库。所以我们将图片数据重新保存在一个图片数组中，然后再和获取的表格数据合并下，最后得到的数组就可以直接拿来保存到数据库了。

	public function readexcel2()
	{
		$imageFilePath = ROOT_PATH . 'public/uploads/imgs/'; //图片本地存储的路径
		if (!file_exists($imageFilePath)) { //如果目录不存在则递归创建
		 	mkdir($imageFilePath, 0777, true);
		}
		try {
			$file = ROOT_PATH . 'public/excel/2.xlsx';; //包含图片的Excel文件
			$objRead = IOFactory::createReader('Xlsx');
			$objSpreadsheet = $objRead->load($file);
			$objWorksheet = $objSpreadsheet->getSheet(0);
			$data = $objWorksheet->toArray();
			$img_data = [];// 图片数组
			foreach ($objWorksheet->getDrawingCollection() as $drawing) {
				list($startColumn, $startRow) = Coordinate::coordinateFromString($drawing->getCoordinates());
				$imageFileName = $drawing->getCoordinates() . mt_rand(1000, 9999);
				switch ($drawing->getExtension()) {
					case 'jpg':
					case 'jpeg':
						$imageFileName .= '.jpg';
						$source = imagecreatefromjpeg($drawing->getPath());
						imagejpeg($source, $imageFilePath . $imageFileName);
						break;
					case 'gif':
						$imageFileName .= '.gif';
						$source = imagecreatefromgif($drawing->getPath());
						imagegif($source, $imageFilePath . $imageFileName);
						break;
					case 'png':
						$imageFileName .= '.png';
						$source = imagecreatefrompng($drawing->getPath());
						imagepng($source, $imageFilePath . $imageFileName);
						break;
				}
				$img_data[$startRow-1][$startColumn] = '/uploads/imgs/' . $imageFileName;
			}
			dump($img_data);
			// 合并表格数据
			if(!empty($img_data)){
				foreach ($img_data as $key => $value){
					//$data[$key][2] 是导入表格图片的哪一行
                	$data[$key][2] = $value['C'];
				}
			}
			dump($data);
		} catch (\Exception $e) {
		 	throw $e;
		}
	}

再看看最后输出的数据：

// 图片数组
array(2) {
  [1] => array(1) {
    ["C"] => string(24) "/uploads/imgs/C27788.png"
  }
  [2] => array(1) {
    ["C"] => string(24) "/uploads/imgs/C35897.png"
  }
}
// 合并的表格数据数组
array(3) {
  [0] => array(3) {
    [0] => string(6) "编码"
    [1] => string(6) "名称"
    [2] => string(6) "图片"
  }
  [1] => array(3) {
    [0] => string(4) "B101"
    [1] => string(9) "票据夹"
    [2] => string(24) "/uploads/imgs/C27788.png"
  }
  [2] => array(3) {
    [0] => string(4) "B102"
    [1] => string(6) "油笔"
    [2] => string(24) "/uploads/imgs/C35897.png"
  }
}

最后的数组和适合我们保存到数据库中。