How can PHP developers ensure that the DOCTYPE declaration is correctly integrated to generate valid PHP code?

To ensure that the DOCTYPE declaration is correctly integrated in PHP code, developers can use the `echo` function to output the HTML DOCTYPE declaration at the beginning of the PHP file. This will ensure that the correct document type is set for the HTML output generated by the PHP code. 

<?php
echo "<!DOCTYPE html>";
// Rest of the PHP code goes here
?>

Keywords

DOCTYPE declaration PHP code integration validation developers

Related Questions