How can the use of meta tags, such as noindex, impact the visibility of specific pages on a PHP website?

Using meta tags like noindex on specific pages of a PHP website can impact their visibility on search engines. This can be useful for hiding pages that are not meant to be indexed, such as admin pages or duplicate content. To implement this, you can add the noindex meta tag to the head section of the HTML code for the specific pages you want to hide from search engines. 

<?php
if ($pageShouldBeNoindexed) {
    echo '<meta name="robots" content="noindex">';
}
?>

Keywords

meta tags noindex visibility PHP website specific pages

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