What could be the reason for the "echo" command not being executed in PHP scripts?

The reason for the "echo" command not being executed in PHP scripts could be due to syntax errors, missing semicolons, or incorrect file extensions. To solve this issue, ensure that the PHP tags "<?php ?>" are correctly placed at the beginning and end of the script, and make sure that there are no syntax errors in the code.

&lt;?php
// Correctly placed PHP tags and echo command
echo &quot;Hello, World!&quot;;
?&gt;