How Can I Extract Image Metadata (URL,

Extracting Image Metadata from HTML Using PHP

Your objective is to crawl your website's HTML pages and gather specific image metadata, including the source URL, title, and alternate representation. To achieve this, let's explore an efficient solution leveraging PHP's DOMDocument class and regular expressions.

To begin, you'll need to retrieve the HTML content of each page using the file_get_contents() function. Once you have the HTML, the DOMDocument class allows you to parse it as an XML structure. This enables you to easily access and manipulate the elements within the HTML.

For your specific case, you'll want to focus on the tags within the HTML. To do this, use the getElementsByTagName() method to retrieve all elements. Each of these elements represents an image on the page.

Now, you can use the getAttribute() method to extract the desired metadata. Specifically, you can obtain the image's source URL from the src attribute, the title from the title attribute (if present), and the alternate representation from the alt attribute (if present).

By combining these techniques, you can effectively extract the image metadata from HTML pages, allowing you to build your desired list of images with their titles and alternative representations.

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