Develop Reference

Speed up admin-ajax.php request in CPT filters

I have custom post types with JS filtering (based on category). There are simple html boxes + php code with ACF fields what display after select category.
Problem is it take 1 second or more to load all this html boxes so its not so smooth.
This is my JS (file filters.js):
(function($){
$(document).ready(function(){
$(document).on('click', '.js-filter-item > a', function(e){
e.preventDefault();
var category = $(this).data('category');
$.ajax({
url:wp_ajax.ajax_url,
data: { action: 'filter', category: category },
type: 'post',
success: function(result) {
$('.js-filter').html(result);
},
error: function(result) {
console.warn(result);
}
});
});
});
})(jQuery);
This is html of box what is loaded (file content_pozice_box.php)
<a href="<?php echo get_permalink();?>"><div class="vypis_pozice">
<div class="projekt-wrapper">
<?php
$projekt = get_field('projekt');
if( get_field('projekt') == 'XXX' ) {
?>
<div class="logo-wrapper">
<img src="https://YYY.png" class="logo-wrapper-img">
</div><?php
}
if( get_field('projekt') == 'YYY' ) {
?>
<div class="logo-wrapper">
<img src="https://XXX.png" class="logo-wrapper-img">
</div>
<?php
}
?>
<div class="field_projekt"><h3><?php the_field('projekt');?></h3><div class="field_AAA">AAA:
<?php if ( get_field( 'AAA' ) ): ?>
<?php the_field('AAA');?>
<?php else: // field_name returned false ?>
dohodou
<?php endif; // end of if field_name logic ?>
</div></div>
</div>
<?php the_title('<h3>', '</h3>'); ?>
<div class="location-wrapper">
<div class="BBB"><img src="https://BBB.png"><?php the_field('BBB');?></div>
<div class="CCC"><img src="https://CCC.png"><?php the_field('CCC');?></div>
</div>
<div class="DDD"><?php $cat = get_the_category(); echo $cat[0]->cat_name; ?></div><div class="job-button">Otevřít</div>
</div></a>
PHP (loading JS, Ajax, function)
function load_scripts() {
wp_enqueue_script('ajax', get_stylesheet_directory_uri() . '/' . 'template-parts/' .'filters.js', array('jquery'), NULL, true);
wp_localize_script('ajax' , 'wp_ajax',
array('ajax_url' => admin_url('admin-ajax.php'))
);
}
add_action( 'wp_enqueue_scripts', 'load_scripts');
add_action( 'wp_ajax_nopriv_filter', 'filter_ajax' );
add_action( 'wp_ajax_filter', 'filter_ajax' );
function filter_ajax() {
$category = $_POST['category'];
$args = array(
'post_type' => 'pozice',
'posts_per_page' => -1
);
if(isset($category)) {
$args['category__in'] = array($category);
}
$query = new WP_Query($args);
if($query->have_posts()) :
while($query->have_posts()) : $query->the_post();
include("content_pozice_box.php");
endwhile;
endif;
wp_reset_postdata();
die();
}

This won't solve all your problems but the first thing you should do is reduce your database calls. get_field('projekt') is called 4 times, which runs for every iteration of your loop. Oddly, you've already set it to a variable:
$projekt = get_field('projekt');
But you're not using the variable anywhere. So try replacing that first, so that it only runs once per iteration:
if ( $projekt ) {...}
While you're at it you should always escape output for security's sake. I.E. Instead of <h3><?php the_field('projekt');?></h3> replace with <h3><?php echo esc_html( $projekt ); ?></h3>.
To find other sources of inefficiencies you might try the Query Monitor plugin, as well as your browser's dev tools. I'm not sure about your JS. It looks fine to me but perhaps someone else here will notice something.

AJAX Load More on Custom Post Grid

I cant get this to work. I am trying to create a custom post type grid with ajax load more button to show 6 mosts per page in the grid. I can get the posts to show but the Load More button just scrolls to the top of the page like a normal anchor link.
My theme code:
<div class="tabgrid">
<?php
$postsPerPage = 6;
$args = array(
'post_type' => 'dslc_projects',
'posts_per_page' => $postsPerPage,
'offset' => $offset
);
$loop = new WP_Query($args);
while ($loop->have_posts()) : $loop->the_post();
?><div class="project-grid-item">
<a href="<?php the_permalink() ?>">
<h3><?php the_title() ?></h3>
<p>View project...</p> </a>
</div><?php
endwhile; ?>
<?php echo '<div id="more_posts">Load More</div>';
wp_reset_postdata();
?>
</div>
</div>
My PHP:
function more_post_ajax(){
$offset = $_POST["offset"];
$ppp = $_POST["ppp"];
header("Content-Type: text/html");
$args = array(
'post_type' => 'post',
'posts_per_page' => $ppp,
'offset' => $offset
);
$loop = new WP_Query($args);
while ($loop->have_posts()) { $loop->the_post();
the_content();
}
exit;
}
add_action('wp_ajax_nopriv_more_post_ajax', 'more_post_ajax');
add_action('wp_ajax_more_post_ajax', 'more_post_ajax');
My JS:
var ajaxUrl = "<?php echo admin_url('admin-ajax.php')?>";
var page = 1; // What page we are on.
var ppp = 6; // Post per page
$("#more_posts").on("click",function(){ // When btn is pressed.
$("#more_posts").attr("disabled",true); // Disable the button, temp.
$.post(ajaxUrl, {
action:"more_post_ajax",
offset: (page * ppp) + 1,
ppp: ppp
}).success(function(posts){
page++;
$(".tabgrid").append(posts); // CHANGE THIS!
$("#more_posts").attr("disabled",false);
});
});
can anyone see what could be wrong here?

Your anchor is just a normal anchor and href="#" means scroll to top. Your JS code is trying to add a handler to and element with the id "#more_posts" but your anchor doesn't have an id.
Try replacing your anchor with <div id="more_posts">Load More</div>

AJAX Interfering with if statement in while loop?

I am trying to load my sidebars in my while loop by using if statements that call them after a certain number of posts. It's important to note that I am using AJAX code (provided below) to load in posts on scroll and I believe it may be causing the issue.
Though they are sidebars, they are not physically a sidebar but rather content loaded between posts.
I've tried for a week to locate the problem but I cannot seem to get the sidebars to load with AJAX as a if statement in the while loop.
Important to note: The sidebar will load after the number of posts if it's not loaded through AJAX. So if it's in the initial load, the sidebars load. But when you continue to scroll to say the third or fourth bar it will not load and the AJAX will only load the (parts/content).
I need to either be able to resolve the if statement so it works within the while loop that loads through AJAX or I'm open to an alternate solution as long as it doesn't remove the AJAX.
A lot of work has been put into making this loop work and help is greatly appreciated!
front-page.php
<?php
$current_page = max( 1, get_query_var( 'paged' ) );
$the_query = new WP_Query( array(
'cat' => '-21',
'post_type' => 'post',
'posts_per_page' => 5,
'paged' => $current_page,
'tax_query' => array(
array(
'taxonomy' => 'topics',
'operator' => 'NOT EXISTS',
'field' => 'term_id',
'terms' => $term_id
)
)
) );
wp_localize_script( 'my_loadmore', 'misha_loadmore_params', array(
'ajaxurl' => admin_url( 'admin-ajax.php', 'relative' ),
'posts' => json_encode( $the_query->query_vars ),
'current_page' => $current_page,
'max_page' => $the_query->max_num_pages
) );
?>
<div id="main" class="container-fluid">
<?php if ($the_query->have_posts()) : ?>
<?php $count = 0; ?>
<?php while ($the_query->have_posts()) : $the_query->the_post(); get_template_part( 'parts/content', get_post_format() ); ?> <!-- This parts/content loads -->
<?php $count++; ?>
<!-- the dynamic_sidebar does not load -->
<?php if ($count == 2 && is_active_sidebar('sidebar1') ) : ?>
<div class="side-container first-side">
<?php dynamic_sidebar('sidebar1'); ?>
</div>
<?php endif; ?>
<?php if ($count == 10 && is_active_sidebar('sidebar2') ) : ?>
<div class="side-container first-side">
<?php dynamic_sidebar('sidebar2'); ?>
</div>
<?php endif; ?>
<?php if ($count == 20 && is_active_sidebar('sidebar3') ) : ?>
<div class="side-container third-side">
<?php dynamic_sidebar('sidebar3'); ?>
</div>
<?php endif; ?>
<?php endwhile; ?>
<?php endif; ?>
<?php wp_reset_postdata(); ?>
<?php get_footer(); ?>
</div><!-- END CONTAINER -->
parts/content -- this loads as expected including code if it's helpful
<div class="row post"> <!-- Post is mentioned in the below JS to load -->
<div class="col-sm-5">
<h2>Text</h2>
</div>
<div class="col-sm-7">
<h3>text</h3>
</div>
</div><!-- END ROW-->
sidebar code - works when initially loaded but doesn't when AJAX calls on this code such as the last two sidebars in front-page.php
<?php
$term = get_term_by( 'slug', get_query_var( 'term' ), get_query_var( 'taxonomy' ) ); ?>
<?php while( $flexible_posts->have_posts() ) : $flexible_posts->the_post(); global $post; ?>
<div class="sidebar-area">
//sidebar code here
}
endwhile;
?>
myloadmore.js - AJAX Call
jQuery(function($){
var canBeLoaded = true,
bottomOffset = 2000;
$(window).scroll(function(){
if ( misha_loadmore_params.current_page >= misha_loadmore_params.max_page ) {
return;
}
var data = {
'action': 'loadmore',
'query': misha_loadmore_params.posts,
'page' : misha_loadmore_params.current_page
};
if( $(document).scrollTop() > ( $(document).height() - bottomOffset ) && canBeLoaded == true ){
$.ajax({
url : misha_loadmore_params.ajaxurl,
data: data,
type: 'POST',
beforeSend: function( xhr ){
// AJAX call is in process, we shouldn't run it again until complete
canBeLoaded = false;
},
success:function(data){
if( data ) {
$('#main').find('div.post:last-of-type').after( data ); // where to insert posts
canBeLoaded = true; // the ajax is completed, now we can run it again
misha_loadmore_params.current_page++;
bottomOffset = ( $( '#main > div.post:last' ).offset() || {} ).top
}
}
});
}
});
});
functions.php - Added for further context
function misha_my_load_more_scripts() {
wp_register_script( 'my_loadmore', get_stylesheet_directory_uri() . '/js/myloadmore.js',
array( 'jquery' ), '', true );
wp_enqueue_script( 'my_loadmore' );
}
add_action( 'wp_enqueue_scripts', 'misha_my_load_more_scripts' );
function misha_loadmore_ajax_handler() {
$args = json_decode( wp_unslash( $_POST['query'] ), true );
$args['paged'] = $_POST['page'] + 1; // load the next page
$the_query = new WP_Query( $args );
if ( $the_query->have_posts() ) :
while ( $the_query->have_posts() ) : $the_query->the_post();
get_template_part( 'parts/content', get_post_format() );
endwhile;
endif;
wp_die();
}
add_action( 'wp_ajax_loadmore', 'misha_loadmore_ajax_handler' ); // Authenticated users
add_action( 'wp_ajax_nopriv_loadmore', 'misha_loadmore_ajax_handler' ); // Non-authenticated users

The trick here was to add the if statements inside of the AJAX handlers as well. Perhaps someone with AJAX experience can add to this one day to explain why it works, but all I know is that it does. All the code from my question is the same below is the difference from the functions.php ajax handler function.
function misha_loadmore_ajax_handler() {
$args = json_decode( wp_unslash( $_POST['query'] ), true );
$args['paged'] = $_POST['page'] + 1; // load the next page
$the_query = new WP_Query( $args );
if ( $the_query->have_posts() ) :
while ( $the_query->have_posts() ) : $the_query->the_post();
get_template_part( 'parts/content', get_post_format() );
<?php if ($count == 2 && is_active_sidebar('sidebar1') ) : ?>
<div class="side-container first-side">
<?php dynamic_sidebar('sidebar1'); ?>
</div>
<?php endif; ?>
<?php if ($count == 10 && is_active_sidebar('sidebar2') ) : ?>
<div class="side-container first-side">
<?php dynamic_sidebar('sidebar2'); ?>
</div>
<?php endif; ?>
<?php if ($count == 20 && is_active_sidebar('sidebar3') ) : ?>
<div class="side-container third-side">
<?php dynamic_sidebar('sidebar3'); ?>
</div>
<?php endif;
endwhile;
endif;
wp_die();
}

Need to fire an alert after "page load" on same page

This is a WordPress site and I have a template that renders all posts in a list at this URL http://www.example.com/articles. When the user clicks on a post title, it loads the content of the post using the same template but with a different URL http://www.example.com/articles/?article_id=298. What I cannot figure out is how to show an alert after the page loads the post content. I've tried setTimeout, $(document).ready, $(window).load, window.onload=funtion(), and now $(document).on("pagecontainerload",function().
JQuery/JavaScript
$('a.open-alert').click(function() {
$(document).on("pagecontainerload",function(){
window.alert('hey');
});
});
HTML
<?php
$tearsheet = get_query_var('article_id');
if($tearsheet != '') {
echo 'there is something here';
} else {
$args = array(
'post_type' => 'post',
'posts_per_page' => -1,
);
$query = new WP_Query( $args );
if($query->have_posts()) :
while($query->have_posts()) :
$query->the_post();
?>
<div>
<?php $id = get_the_ID(); ?>
<?php $title = get_the_title(); ?>
<a class="open-alert" href="<?php bloginfo('url'); echo '/find-articles/?article_id='.$id; ?>"><?php echo $title; ?></a>
</div>
<?php
endwhile;
endif;
}
?>

The click handler will never be executed, since the page unloads and a new page is loaded - the one in the link <a class="open-alert" href="<?php bloginfo.... You may have a return false in the onclick handler, but that would mean, the link will not be executed.
In order to do this dynamically, consider reloading only the container within that page, containing the post text by some Ajax functionality.

Adding a "more" Button

I'm trying to add a "load more" button and limit the results below, so that there aren't 1000 things loading all at once in the portfolio page, here: http://typesetdesign.com/portfolio/
My knowledge of PHP isn't very good, so I'm not sure what I'm supposed to do. I know I could limit the projects here:
<?php query_posts( 'post_type=project&posts_per_page=200' );
But how would I then load more if I limited that result?
Here is the page coding for that entire page:
<div id="projects" class="clearfix">
<?php $page_skills = get_post_meta($post->ID, "_ttrust_page_skills", true); ?>
<?php if ($page_skills) : // if there are a limited number of skills set ?>
<?php $skill_slugs = ""; $skills = explode(",", $page_skills); ?>
<?php if (sizeof($skills) > 1) : // if there is more than one skill, show the filter nav?>
<ul id="filterNav" class="clearfix">
<li class="allBtn"><?php _e('All', 'themetrust'); ?></li>
<?php
$j=1;
foreach ($skills as $skill) {
$skill = get_term_by( 'slug', trim(htmlentities($skill)), 'skill');
if($skill) {
$skill_slug = $skill->slug;
$skill_slugs .= $skill_slug . ",";
$a = '<li><a href="#" data-filter=".'.$skill_slug.'">';
$a .= $skill->name;
$a .= '</a></li>';
echo $a;
echo "\n";
$j++;
}
}?>
</ul>
<?php $skill_slugs = substr($skill_slugs, 0, strlen($skill_slugs)-1); ?>
<?php else: ?>
<?php $skill = $skills[0]; ?>
<?php $s = get_term_by( 'name', trim(htmlentities($skill)), 'skill'); ?>
<?php if($s) { $skill_slugs = $s->slug; } ?>
<?php endif;
$temp_post = $post;
$args = array(
'ignore_sticky_posts' => 1,
'posts_per_page' => 200,
'post_type' => 'project',
'skill' => $skill_slugs
);
$projects = new WP_Query( $args );
else : // if not, use all the skills ?>
<ul id="filterNav" class="clearfix">
<li class="allBtn"><?php _e('All', 'themetrust'); ?></li>
<?php $j=1;
$skills = get_terms('skill');
foreach ($skills as $skill) {
$a = '<li><a href="#" data-filter=".'.$skill->slug.'">';
$a .= $skill->name;
$a .= '</a></li>';
echo $a;
echo "\n";
$j++;
}?>
</ul>
<?php
$temp_post = $post;
$args = array(
'ignore_sticky_posts' => 1,
'posts_per_page' => 200,
'post_type' => 'project'
);
$projects = new WP_Query( $args );
endif; ?>
<div class="thumbs masonry">
<?php while ($projects->have_posts()) : $projects->the_post(); ?>
<?php
global $p;
$p = "";
$skills = get_the_terms( $post->ID, 'skill');
if ($skills) {
foreach ($skills as $skill) {
$p .= $skill->slug . " ";
}
}
?>
<?php get_template_part( 'part-project-thumb'); ?>
<?php endwhile; ?>
<?php $post = $temp_post; ?>
</div>
Thanks so much, any input is a help!

Edit
Using Tables with pagination bootstrap style http://datatables.net/examples/basic_init/multiple_tables.html
Massive data base with pagination take a look here: https://stackoverflow.com/a/3707457/2293454
I didn't see your site, now I have, what you might need is something like this:
https://stackoverflow.com/a/21408418/2293454
as you can see that example has a limiter iMyLoadLimit = 5, so, wen the user scroll down the page, it will load more based on the total number of fetched data, if you load 100 articles or 1000, they will be divided by the limiter in the java, the result will be that every time the user scroll down it will display the next 5 or whatever number you want to display...
I hope that helps...

You need pagination (server side) and might want infinite scrolling (client side)
You may want to look at:
Simple PHP Pagination script
http://jscroll.com/
How to paginate query results for Infinite Scroll?