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<title>[31089] trunk/src/wp-admin/includes/upgrade.php: Enable Pretty Permalinks for new sites during install if the server supports it.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/31089">31089</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/31089","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>dd32</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2015-01-08 06:46:55 +0000 (Thu, 08 Jan 2015)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Enable Pretty Permalinks for new sites during install if the server supports it.
See <a href="https://core.trac.wordpress.org/ticket/6481">#6481</a>, Props valendesigns, DrewAPicture & ericlewis</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpadminincludesupgradephp">trunk/src/wp-admin/includes/upgrade.php</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunksrcwpadminincludesupgradephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/includes/upgrade.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/includes/upgrade.php 2015-01-08 06:26:38 UTC (rev 31088)
+++ trunk/src/wp-admin/includes/upgrade.php 2015-01-08 06:46:55 UTC (rev 31089)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -87,6 +87,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> wp_install_defaults($user_id);
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ wp_install_maybe_enable_pretty_permalinks();
+
</ins><span class="cx" style="display: block; padding: 0 10px"> flush_rewrite_rules();
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> wp_new_blog_notification($blog_title, $guessurl, $user_id, ($email_password ? $user_password : __('The password you chose during the install.') ) );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -260,6 +262,75 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> endif;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+if ( ! function_exists( 'wp_install_maybe_enable_pretty_permalinks' ) ) :
+/**
+ * Enable pretty permalinks if available.
+ *
+ * This function will enable pretty permalinks if it can verify they work.
+ * If all pretty permalinks formats fail to work, WordPress will fall back
+ * to ugly permalinks by setting an empty permalink structure.
+ *
+ * @since 4.2.0
+ *
+ * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
+ */
+function wp_install_maybe_enable_pretty_permalinks() {
+ global $wp_rewrite;
+
+ // Bail if we alredy have permalinks enabled (Multisite)
+ if ( get_option( 'permalink_structure' ) ) {
+ return;
+ }
+
+ /*
+ * The Permalink structures which WordPress should attempt to use.
+ * The first is designed for mod_rewrite or nginx rewriting.
+ * The second is PATHINFO based permalinks offered under configurations
+ * without rewrites enabled.
+ */
+ $permalink_structures = array(
+ '/%year%/%monthnum%/%day%/%postname%/',
+ '/index.php/%year%/%monthnum%/%day%/%postname%/'
+ );
+
+ foreach ( (array) $permalink_structures as $permalink_structure ) {
+ // Set the desired Permalink structure to try
+ $wp_rewrite->set_permalink_structure( $permalink_structure );
+
+ /*
+ * Flush rules with the hard option to force refresh of the web-server's
+ * rewrite config file (e.g. .htaccess or web.config).
+ */
+ $wp_rewrite->flush_rules( true );
+
+ // Test against a real WordPress Post, or if none were created, a Page URI
+ $test_url = get_permalink( 1 );
+ if ( ! $test_url ) {
+ $test_url = home_url( '/wordpress-check-for-rewrites/' );
+ }
+
+ /*
+ * Send a HEAD request to a random page on the site, and check whether
+ * the 'x-pingback' header is returned as expected.
+ */
+ $response = wp_remote_get( $test_url, array( 'timeout' => 5 ) );
+ $x_pingback_header = wp_remote_retrieve_header( $response, 'x-pingback' );
+ $pretty_permalinks = $x_pingback_header && $x_pingback_header === get_bloginfo( 'pingback_url' );
+
+ if ( $pretty_permalinks ) {
+ return true;
+ }
+ }
+
+ /*
+ * If it makes it this far, Pretty Permalinks failed to activate.
+ * Reset and allow the user to select it themselves.
+ */
+ $wp_rewrite->set_permalink_structure( '' );
+ $wp_rewrite->flush_rules( true );
+}
+endif;
+
</ins><span class="cx" style="display: block; padding: 0 10px"> if ( !function_exists('wp_new_blog_notification') ) :
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * {@internal Missing Short Description}}
</span></span></pre>
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