How does the use of robot.txt relate to PHP header location redirects in terms of search engine optimization?

The use of robots.txt file is related to search engine optimization as it tells search engine crawlers which pages or directories should not be indexed. When using PHP header location redirects, it is important to ensure that the redirected pages are allowed to be indexed by search engines to avoid any negative impact on SEO. To address this issue, you can use conditional statements in the robots.txt file to allow indexing of redirected pages. 

<?php
// Check if the page is being redirected
if(condition){
    // Allow indexing of redirected page in robots.txt
    echo "<meta name='robots' content='index, follow'>";
}

// Perform the redirect
header("Location: newpage.php");
exit;
?>

Keywords

robot.txt PHP header location redirects search engine optimization

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