What are the differences in using the alt attribute in HTML 4.01 and XHTML when including images in PHP?

When including images in PHP, it is important to use the alt attribute to provide alternative text for the image, which is crucial for accessibility and SEO purposes. The main difference between using the alt attribute in HTML 4.01 and XHTML is that in HTML 4.01, the alt attribute is optional, while in XHTML, it is required. Therefore, when including images in PHP, make sure to always include the alt attribute to comply with XHTML standards. 

<?php
$image_path = "image.jpg";
$alt_text = "Description of the image";

echo "<img src='$image_path' alt='$alt_text'>";
?>

Keywords

alt attribute HTML 4.01 XHTML images PHP

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