php web page print page settings

PHP web page printing page settings

With the popularization and development of the Internet, more and more companies, organizations and individuals have begun to use PHP to develop web applications. However, for the implementation of some printing functions, many people But confused. Web page printing plays a very important role. It can output web page content in paper form for users to review or back up.

When printing on a web page, due to the influence of factors such as the printer model and printing paper size, the printing result may be inconsistent with the effect displayed on the web page. In order to ensure the consistency and readability of the printing effect, the printing result must be Page setup and optimization.

This article will introduce how to implement the web page printing function in PHP development, and also discuss how to set the print page to obtain the best results when printing.

1. How to implement web page printing with PHP

1. Use JavaScript to implement web page printing

Embed JavaScript code in the web page through window.print() Method to implement the printing function of web pages. The following is a simple example:

<script type="text/javascript">
    function doPrint() {
        window.print();
    }
</script>

<input type="button" value="打印" onClick="doPrint()">

Using this method can simply implement the printing function of the web page, but it cannot be set and optimized for printing pages.

2. Use CSS to realize web page printing

Use @media print{} syntax in CSS to define the style attributes during printing, which is achieved by loading the CSS file during printing Print style settings. The following is an example:

@media print {
  /* 隐藏非打印元素 */
  body * { visibility: hidden; }
  /* 使用自定义字体 */
  @font-face { font-family: MyFont; src: url(fonts/MyFont.ttf); }
  /* 设置打印页面的页脚 */
  footer { position: fixed; bottom: 0; }
  /* 设置打印页面的页眉 */
  header { position: fixed; top: 0; }
  /* 设置打印页面的页码 */
  @page { counter: page; }
  footer:before { content: "Page " counter(page); }
  /* 显示打印元素 */
  .print { visibility: visible; }
}

Using this method, the print page can be set up and optimized, but due to different browsers' different support for CSS, compatibility issues may occur.

3. Use PHP instructions to implement web page printing

Use specific print instructions in PHP to implement the printing function. The following is an example:

<?php
    echo '<h1>Hello, world!</h1>';
    echo '<p>This is a PHP printed page.</p>';
    echo '<button onclick="window.print()">Print this page</button>';
?>

Using this method, you can directly output the content and implement the printing function through PHP syntax, but the printing page cannot be set and optimized.

2. Settings and optimization of printing pages

1. Hide non-printing elements

Hide elements on the page that do not need to be printed to avoid wasting printing paper. This can be achieved using @media print{} syntax in CSS.

@media print {
    .no-print { display: none; }
}

Just add the attribute class="no-print" to the element that needs to be hidden.

2. Specify the printing area

If you only need to print a certain part of the page (such as tables, lists, etc.), you can use @media print{} in CSS The syntax specifies the print area.

@media print {
    #print-area { display: block; }
    body * { visibility: hidden; }
}

Specify the ID of the element that needs to be printed as print-area, and hide the non-printing elements in CSS.

3. Customize the style of the printed page

You can use the @media print{} syntax in CSS to set the style of the printed page, including text size, font, color, and background. , borders and other attributes.

@media print {
    /* 使用自定义字体 */
    @font-face { font-family: MyFont; src: url(fonts/MyFont.ttf); }
    /* 设置字体大小和颜色 */
    h1, h2, h3, p { font-size: 14pt; color: #333; }
    /* 设置表格的样式 */
    table { font-size: 10pt; border-collapse: collapse; width: 100%; }
    th, td { border: 1px solid #aaaaaa; padding: 5px; }
}

Just define the required style in the CSS file of the printed page.

4. Add the header and footer of the printed page

Use the @media print{} syntax of CSS to add customization to the header and footer positions of the printed page Content, including page number, date, copyright statement and other information.

@media print {
    /* 设置打印页面的页脚 */
    footer { position: fixed; bottom: 0; }
    /* 设置打印页面的页眉 */
    header { position: fixed; top: 0; }
    /* 设置打印页面的页码 */
    @page { counter: page; }
    footer:before { content: "Page " counter(page); }
}

Just add the required styles to the CSS file of the printed page.

5. Preview the effect of the printed page

Before performing the actual printing operation, it is best to use the browser's print preview function to view the effect of the printed page. This can be achieved through "File-Print Preview" on the menu bar or the shortcut key Ctrl P.

In the print preview interface, you can set the print page, such as selecting a printer, adjusting the paper size, selecting the printing range, etc. If you find that the printing effect is not good, you can try adjusting CSS styles or other printing settings.

6. Compatible with different browsers

When using CSS @media print{} syntax to set up print pages, compatibility between different browsers should be considered as much as possible sex. Since different browsers have different support for CSS, inconsistent printing effects may occur.

In order to be compatible with more browsers, you can add some commonly used printing styles to CSS, such as text size, color, borders, etc. Try to avoid using special CSS properties or IE browser-specific styles.

3. Conclusion

This article introduces how to implement the web page printing function in PHP development, and also discusses how to set the print page to obtain the best results when printing. Whether you use JavaScript, CSS or PHP instructions to implement the printing function, you can improve the printing effect, shorten the printing time, and improve the printing quality through the settings and optimization of the print page.

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