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PO$query_string in wordpress is returning null?
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  1. PO$query_string in wordpress is returning null?
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    copied!<p>I'm trying to make a pagination system, and to make it work on every page I'm using the $query_string variable, which supposedly contains all the information about the category, etc.</p> <p>So I'm doing something like this:</p> <pre><code>add_action('wp_ajax_and_action', 'get_posts_page'); add_action('wp_ajax_nopriv_and_action', 'get_posts_page'); function get_posts_page() { $query_string = $_POST['query_string']; global $wpdb; query_posts($query_string . '&amp;posts_per_page=10&amp;post_status=publish&amp;offset='.$_POST['off']); </code></pre> <p>It's in my functions.php file. I've globalized the <code>$query_string</code> variable in my header.php file. The <code>$_POST['query_string']</code> is coming from a javascript function (also in my functions.php file) which I've set to be in wp_head (so the head of the document I assume). It's posting a bunch of data to the PHP function:</p> <pre><code>$.post('&lt;?php bloginfo('siteurl') ?&gt;/wp-admin/admin-ajax.php', { action: 'and_action', off: offset+number, pagenumber: page_number, query_string: '&lt;?php echo $query_string; ?&gt;' }, function(data) { </code></pre> <p>However, upon further inspection it shows the query_string variable as null. So when I do: <code>&lt;?php echo $query_string ?&gt;</code> nothing returns. Any ideas why that might be? Thanks :)</p> <hr> <h2>Updated</h2> <p>Heres an Update</p> <h2>functions.php</h2> <p>The Javascript:</p> <pre><code> add_filter('wp_head', 'javascript_page'); function javascript_page() { ?&gt; &lt;script type="text/javascript"&gt; $(document).ready(function() { var number = 10; var offset = 0; var page_number = 2; var busy = false; /* Bind the scroll function to an event */ $(window).bind('scroll', function(e) { /* If the scroll height plus the window height is more than the document height minus 10, continue */ if($(window).scrollTop() + $(window).height() &gt; $(document).height() - 10 &amp;&amp; !busy) { busy = true; /* Quick message so you know more stuff is loading */ $('.loading-more').html('Click to load more posts..'); $.post('&lt;?php bloginfo('siteurl') ?&gt;/wp-admin/admin-ajax.php', { action: 'and_action', off: offset+number, pagenumber: page_number, query_string: '&lt;?php echo $query_string; ?&gt;' }, function(data) { offset = offset+number; $('.empty-div').append('&lt;div class="pages"&gt;&lt;p&gt;Welcome to &lt;strong&gt;Page '+page_number+'&lt;/strong&gt;&lt;/p&gt;&lt;/div&gt;&lt;hr /&gt;'+data); busy = false; page_number += 1; }); } }); $('.loading-more').bind('click', function(e) { busy = true; $('.loading-more').html('&lt;em&gt;Loading more posts..&lt;/em&gt;') /* Quick message so you know more stuff is loading */ $.post('&lt;?php bloginfo('siteurl') ?&gt;/wp-admin/admin-ajax.php', { action: 'and_action', off: offset+number, pagenumber: page_number, query_string: '&lt;?php echo $query_string; ?&gt;' }, function(data) { offset = offset+number; $('.empty-div').append('&lt;div class="pages"&gt;&lt;p&gt;Welcome to &lt;strong&gt;Page '+page_number+'&lt;/strong&gt;&lt;/p&gt;&lt;/div&gt;&lt;hr /&gt;'+data); busy = false; page_number += 1; $('.loading-more').html('Click to load more posts..'); }); }); }); &lt;/script&gt; </code></pre> <p>The PHP function:</p> <pre><code>add_action('wp_ajax_and_action', 'get_posts_page'); add_action('wp_ajax_nopriv_and_action', 'get_posts_page'); function get_posts_page() { $query_string = $_POST['query_string']; global $wpdb; query_posts($query_string . '&amp;posts_per_page=10&amp;post_status=publish&amp;offset='.$_POST['off']); if ( have_posts() ) : while ( have_posts() ) : the_post(); ?&gt; &lt;div id="post-&lt;?php the_ID(); ?&gt;" &lt;?php post_class(); ?&gt;&gt; &lt;h1 class="entry-title"&gt;&lt;a href="&lt;?php the_permalink(); ?&gt;" title="&lt;?php printf( esc_attr__( 'Permalink to %s', 'twentyten' ), the_title_attribute( 'echo=0' ) ); ?&gt;" rel="bookmark"&gt;&lt;?php the_title(); ?&gt;&lt;/a&gt;&lt;/h1&gt; &lt;div class="entry-meta"&gt; &lt;span class="%1$s"&gt;Posted on&lt;/span&gt; &lt;?php the_date('F jS'); ?&gt; - &lt;a class="comment-link" href="&lt;?php the_permalink(); ?&gt;#comment"&gt;&lt;?php comments_number('Leave a Response!', '1 Response', '% Responses'); ?&gt;&lt;/a&gt; &lt;/div&gt;&lt;!-- .entry-meta --&gt; &lt;br /&gt; &lt;a class="post-thumbnail-thing" href="&lt;?php the_permalink(); ?&gt;"&gt;&lt;?php echo get_the_post_thumbnail(); ?&gt;&lt;/a&gt; &lt;div class="entry-content"&gt; &lt;?php the_content( __( '&lt;span class="alignright"&gt; &lt;span class="button-css"&gt;Continue Reading &amp;rarr;&lt;/span&gt; &lt;/span&gt;', 'twentyten' ) ); ?&gt;&lt;br /&gt;&lt;hr /&gt; &lt;?php wp_link_pages( array( 'before' =&gt; '&lt;div class="page-link"&gt;' . __( 'Pages:', 'twentyten' ), 'after' =&gt; '&lt;/div&gt;' ) ); ?&gt; &lt;/div&gt;&lt;!-- .entry-content --&gt; &lt;/div&gt;&lt;!-- #post-## --&gt; &lt;?php comments_template( '', true ); ?&gt; &lt;?php endwhile; endif; die(); } </code></pre> <h2>header.php</h2> <pre><code>&lt;?php global $query_string; ?&gt; </code></pre> <p>As I've said, the main problem is $query_string is null :( </p>
 

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