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php automatic printing settings

May 05, 2023 pm 10:17 PM

随着科技的发展,越来越多的公司和机构开始使用电子系统进行日常工作。但是有些时候,仍然需要打印纸质文档。如果每次手动设置打印参数,效率就会很低。因此,我们可以使用 php 自动打印设置来提高工作效率。

首先,我们需要了解 php 是什么。简单来说,php 是一种非常流行的服务器端编程语言,它可以用于开发网站和应用程序。使用 php 数组来储存打印参数可以极大的方便我们的开发工作。

我们可以创建一个数组来存储打印参数。例如,我们可以定义一个名为 $printOptions 的数组,其中包含纸张大小、颜色模式、打印机名称等选项。以下是一个示例:

$printOptions = array(
    'paperSize' => 'A4',
    'colorMode' => 'gray',
    'printerName' => 'HP LaserJet'
);
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数组中的键名可以是任意的,但最好使用具有代表性的名称。另外,我们可以根据需要添加更多的选项。

然后,我们需要使用 php 实现与打印机的交互。在 php 中,我们可以使用 COM 对象来与打印机进行通信。COM(Component Object Model)是微软开发的一种组件框架,可以用于实现组件化编程。

为了使用 COM 对象,我们需要在 php.ini 文件中启用 com_dotnet 扩展。这可以通过在 php.ini 文件中添加以下行来完成:

extension=php_com_dotnet.dll
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然后,我们需要创建一个 COM 对象,该对象代表打印机。以下是一个示例:

$printer = new COM('WScript.Network');
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我们可以使用该对象来获取可用的打印机列表,并选择一台打印机进行打印。以下是一个示例:

$printers = $printer->EnumPrinterConnections();
$selectedPrinter = '';
foreach ($printers as $p) {
    if (strtolower($p) == strtolower($printOptions['printerName'])) {
        $selectedPrinter = $p;
        break;
    }
}

if ($selectedPrinter != '') {
    // 打印机已选择,继续打印
} else {
    echo '打印机未找到';
}
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在上面的代码中,我们首先使用 $printer->EnumPrinterConnections() 方法获取所有可用的打印机列表。然后,我们遍历列表,并选择与 $printOptions['printerName'] 相同的打印机。如果找到了匹配的打印机,则将其名称存储在 $selectedPrinter 变量中。否则,将输出“打印机未找到”的错误信息。

接下来,我们可以使用 $selectedPrinter 变量将打印参数应用于打印机。以下是一个示例:

$printer->SetDefaultPrinter($selectedPrinter);
$driverSettings = $printer->GetPrinter($selectedPrinter)->GetDriver();
$driverSettings->Orientation = 2; // 横向打印
$driverSettings->PaperSize = 9; // A4
$driverSettings->Color = 2; // 灰度
$printer->GetPrinter($selectedPrinter)->SetDriver($driverSettings);
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在上面的代码中,我们首先使用 $printer->SetDefaultPrinter($selectedPrinter) 方法将 $selectedPrinter 变量指定为默认打印机。然后,我们使用 $printer->GetPrinter($selectedPrinter)->GetDriver() 方法获取当前驱动程序的设置。我们可以根据需要修改这些设置,并使用 $printer->GetPrinter($selectedPrinter)->SetDriver($driverSettings) 方法将更改应用于打印机。

最后,我们可以使用 php 的标准输入输出函数将要打印的内容发送到打印机。以下是一个示例:

$printContents = 'Hello, World!';
$printerObject = new COM('Scripting.FileSystemObject');
$tempFile = $printerObject->GetSpecialFolder(2) . '\\' . time() . '.txt';
$file = fopen($tempFile, 'w');
fwrite($file, $printContents);
fclose($file);
$printCommand = "notepad.exe /p " . $tempFile;
exec($printCommand);
unlink($tempFile);
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在上面的代码中,我们首先创建一个 COM 对象,该对象代表文件系统。然后,我们使用 $printerObject->GetSpecialFolder(2) 方法获取临时文件夹的路径,并在其中创建一个新的文本文件。我们将要打印的内容写入该文件,然后打开 notepad.exe,并使用 /p 开关将该文件打印。最后,我们删除该文件以确保安全性。

总结一下,使用 php 自动打印设置可以方便我们的工作,提高效率。我们可以使用数组来储存打印参数,使用 COM 对象来与打印机进行通信,并使用标准输入输出函数将要打印的内容发送到打印机。希望这篇文章能够帮助你学习如何在 php 中自动配置打印设置。

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