Let's talk about how to set the web page background in php file

With the continuous improvement of modern web design, background images have become an indispensable part of web design. Setting a background in a PHP file is also a relatively simple operation that only requires a few lines of code. In this article, we will explain how to set a background in a PHP file.

1. Use CSS to set the background

The most common way to set the background is to use CSS. Embedding CSS style sheets in PHP files is very convenient, just embed the corresponding code in the PHP file. Below is a basic CSS code example for setting a background image.

  
    <style>
      body {
        background-image: url("bg.jpg");
        background-repeat: no-repeat;
      }
    </style>
  
  
    // 页面内容
  

The URL in the code specifies the location of the background image, here it is set to "bg.jpg". Setting the background-repeat property to no-repeat prevents the image from appearing repeatedly on the page.

2. Use HTML to set the background

In addition to using CSS, you can also use HTML to set the background. The following is sample code:

  
  
  
    // 页面内容
  

The value of the background attribute specifies the position of the background image, which is also "bg.jpg". This property may generate additional HTTP requests, so use CSS to set the background when possible.

3. Dynamically set background

An important feature of PHP is that it can process HTML content on the server side. Therefore, we can also set the background dynamically using PHP. The following is a sample code:

<?php   $bg = "bg.jpg";
?>


  
    <style>
      body {
        background-image: url("<?php echo $bg; ?>");
        background-repeat: no-repeat;
      }
    </style>
  
  
    // 页面内容
  

In the PHP code, we first define a variable $bg to specify the position of the background image. Then, use this variable in your CSS stylesheet to set the background image. Finally, the background can be set dynamically by referencing PHP variables in the HTML content.

Conclusion

Overall, setting the background in a PHP file is very convenient. Using CSS is the most common method, while HTML may generate additional HTTP requests. Dynamically setting the background through PHP can increase the interactivity of the page and dynamically modify the page background according to the user's needs.

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