In today's digital age, websites need visual elements to attract visitors, and images are an important tool for conveying these elements. However, how to ensure that the image is not only beautiful, but also meets SEO standards? This article will introduce a practical method — using PHP to add image watermarks and adjust the new size to scale. In this way, you can ensure that your site is visually striking, while also improving search engines' understanding of the page's content, thereby attracting more organic traffic. PHP is a popular server-side scripting language that can be used to handle various tasks, including image processing. In this article, we will explore how to use PHP technology to add watermarks to images and adjust the new size to the scale. In this way, your website will be more attractive, but also help to improve search engine rankings. First, we need to create a PHP file that contains the watermark image. Then, we will use PHP's GD library to process the images. The GD library provides a series of functions that can easily operate images, such as scaling, rotating and cropping. Next, we will calculate the size ratio of the original image and the watermarked image so that the aspect ratio remains the same when the watermark is added. Finally, we will use the `imagecopymerge () `function to add the watermark to the original image and adjust the size of the new image according to the calculated size. In this way, you can add a watermark to the image without losing quality and ensure that the new dimensions fit the scale of the original image. This will make your site more attractive, while also improving search engines' understanding of the page content, which will attract more organic traffic. In short, using PHP to add image watermarks and adjust the new size proportionally is an effective method to improve the visual effect of the website and search engine ranking.
In today's digital age, websites need visual elements to attract visitors, and images are an important tool for conveying these elements.
What is PHP?.
PHP (Hypertext Preprocessor) is a widely used open source server-side scripting language, especially suitable for Web development.
Why choose PHP for image processing?.
PHP provides a rich image processing function library GDlib, allowing developers to easily perform various operations on images, such as zooming, cropping, rotating, and adding watermarks.
How to use PHP to add image watermark?.
1. Prepare for work.
First, you need to make sure that your server has the GD library installed.
2. Load the original image.
Use 3. Create a watermark image.
You can use 4. Merge images.
Merge the watermark image onto the original image:
5. Save the final image.
Use How to adjust the new size to scale?.
1. Get the original image size.
Use 2. Calculate the new size.
Calculate the new width and height according to the required scale:
3. Resize the image.
Use 4. Save the adjusted image.
Use Comprehensive example: add watermark and resize.
Below is a complete sample code showing how to add watermarks and resize images at the same time:
Conclusion.
By using PHP to add image watermarks and adjust the new size to scale, you can significantly improve the visual and SEO effects of your site.
However, how to ensure that the image is not only beautiful, but also meets SEO standards? This article will introduce a practical method — using PHP to add image watermarks and adjust the new size to scale.
In this way, you can ensure that your site is visually striking, while also improving search engines' understanding of the page's content, thereby attracting more organic traffic.
What is PHP?.
PHP (Hypertext Preprocessor) is a widely used open source server-side scripting language, especially suitable for Web development. It can be embedded in HTML and can interact with databases, which makes it very popular in dynamic web page development.
Why choose PHP for image processing?.
PHP provides a rich image processing function library GDlib, allowing developers to easily perform various operations on images, such as zooming, cropping, rotating, and adding watermarks. In addition, PHP is highly efficient and suitable for processing large amounts of image data, which is essential to improve the response speed and user experience of the website.
How to use PHP to add image watermark?.
1. Prepare for work.
First, you need to make sure that your server has the GD library installed. You can check with the following code:
2. Load the original image.
Use imagecreatefromjpeg()Orimagecreatefrompng()Function to load the original image:
3. Create a watermark image.
You can use imagecreatetruecolor()Create a blank image, then use imagestring()Orimagettftext()Add text watermark:
4. Merge images.
Merge the watermark image onto the original image:
5. Save the final image.
Use imagejpeg()Orimagepng()Save the final image:
How to adjust the new size to scale?.
1. Get the original image size.
Use getimagesize()The function gets the width and height of the original image:
2. Calculate the new size.
Calculate the new width and height according to the required scale:
3. Resize the image.
Use imagescale()Function to adjust image size:
4. Save the adjusted image.
Use imagejpeg()Orimagepng()Save the adjusted image:
Comprehensive example: add watermark and resize.
Below is a complete sample code showing how to add watermarks and resize images at the same time:
Conclusion.
By using PHP to add image watermarks and adjust the new size to scale, you can significantly improve the visual and SEO effects of your site. This not only enhances the user experience, but also improves the search engine's understanding of the page content, thereby attracting more organic traffic.
I hope the introduction in this article can help you effectively display and use PHP technology in the technical blog, especially the part about image processing.
