add meta key or meta value or custom field for post

// Post offer box
add_action( 'add_meta_boxes', 'post_offer' );
function post_offer() {
   add_meta_box(
       'post_offer',
       __( 'Price', 'agrg' ),
       'post_offer_content',
       'post',
       'side',
       'high'
   );
}

function post_offer_content( $post ) {
wp_nonce_field( 'myplugin_meta_boxeee', 'myplugin_meta_box_nonceeee' );
$post_offer = get_post_meta( $post->ID, 'post_offer', true );

echo '<label for="post_offer"></label>';
echo '<input type="text" id="post_offer" name="post_offer" placeholder="'._e('Enter price here','agrg').'" value="';
echo $post_offer;
echo '">';

}

add_action( 'save_post', 'post_offer_save' );
function post_offer_save( $post_id ) {

global $post_offer;

if ( ! isset( $_POST['myplugin_meta_box_nonceeee'] ) ) {
return;
}
if ( ! wp_verify_nonce( $_POST['myplugin_meta_box_nonceeee'], 'myplugin_meta_boxeee' ) ) {
return;
}
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
return;
}

if(isset($_POST["post_offer"]))
$post_offer = $_POST['post_offer'];
update_post_meta( $post_id, 'post_offer', $post_offer );

}

Add custom taxonomy type under post with form

REF : https://metabox.io/plugins/custom-taxonomy/


// Post Stock box
add_action( 'add_meta_boxes', 'post_stock' );
function post_stock() {
   add_meta_box(
       'post_stock',
       __( 'Stock', 'agrg' ),
       'post_stock_content',
       'post',
       'side',
       'high'
   );
}

function post_stock_content( $post ) {
wp_nonce_field( 'myplugin_meta_boxee', 'myplugin_meta_box_nonceee' );
$post_stock = get_post_meta( $post->ID, 'post_stock', true );

echo '<label for="post_stock"></label>';
echo '<input type="text" id="post_stock" name="post_stock" placeholder="'._e('Enter Stock here','agrg').'" value="';
echo $post_stock;
echo '">';

}

add_action( 'save_post', 'post_stock_save' );
function post_stock_save( $post_id ) {
global $post_stock;
if ( ! isset( $_POST['myplugin_meta_box_nonceee'] ) ) {
return;
}
if ( ! wp_verify_nonce( $_POST['myplugin_meta_box_nonceee'], 'myplugin_meta_boxee' ) ) {
return;
}
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
return;
}

if(isset($_POST["post_stock"]))
$post_stock = $_POST['post_stock'];
update_post_meta( $post_id, 'post_stock', $post_stock );

}


$stock_labels = array(
            'name' => __( 'Stock', 'agrg' ),
            'singular_name' => __( 'Stock', 'agrg' ),
            'search_items' =>  __( 'Search Stocks', 'agrg' ),
            'popular_items' => __( 'Popular Stocks', 'agrg' ),
            'all_items' => __( 'All Stocks', 'agrg' ),
            'parent_item' => __( 'Parent Stock', 'agrg' ),
            'parent_item_colon' => __( 'Parent Stock:', 'agrg' ),
            'edit_item' => __( 'Edit Stock', 'agrg' ),
            'update_item' => __( 'Update Stock', 'agrg' ),
            'add_new_item' => __( 'Add New Stock', 'agrg' ),
            'new_item_name' => __( 'New Stock Name', 'agrg' ),
            'separate_items_with_commas' => __( 'Separate Stocks with commas', 'agrg' ),
            'add_or_remove_items' => __( 'Add or remove Stock', 'agrg' ),
            'choose_from_most_used' => __( 'Choose from the most used Stocks', 'agrg' ),
            'menu_name' => __( 'Stocks', 'agrg' )
        );
register_taxonomy("Stock",
array("post"),
array("hierarchical" => true,
'labels' => $stock_labels,
'show_ui' => true,
                'query_var' => true,
                'rewrite' => array('slug' => __('Stock', 'agrg'))
)
);


Add value in custom taxonomy pro-grammatically :

REF: https://codex.wordpress.org/Function_Reference/wp_insert_term

/* Location update while seller registration */
$saddress = sanitize_text_field($address);
//check location is exist
$loc_exist = term_exists( $saddress ); // array is returned if taxonomy is given

if (empty($loc_exist) ) {

$parent_term = term_exists( 'location' ); // array is returned if taxonomy is given
       $parent_term_id = $parent_term['term_id']; // get numeric term id
wp_insert_term(
 $saddress, // the term
 'location', // the taxonomy
 array(
   'description'=> 'A seller location.',
   'slug' => $saddress,
   'parent'=> $parent_term_id
                   )
    );
}

wishlist for post in wordpress

https://wordpress.org/plugins/gd-mylist/

https://wordpress.org/plugins/wp-favorite-posts

author based filter in all post in wp-admin in wordpress

function.php

function rudr_filter_by_the_author() { $params = array( 'name' => 'author', // this is the "name" attribute for filter <select> 'show_option_all' => 'All authors' // label for all authors (display posts without filter) );   if ( isset($_GET['user']) ) $params['selected'] = $_GET['user']; // choose selected user by $_GET variable   wp_dropdown_users( $params ); // print the ready author list }   add_action('restrict_manage_posts', 'rudr_filter_by_the_author');

https://rudrastyh.com/wordpress/filter-posts-by-author.html

wordpress get latest post from another website

1.Using Template
2. RSS widget


https://www.worldoweb.co.uk/2012/display-wordpress-posts-on-another-wp-blog

plugin:

https://wordpress.org/plugins/featured-images-for-rss-feeds/screenshots/

https://wordpress.org/plugins/wp-rss-aggregator/screenshots/



<?php
/**
 * Template Name: Blog  Page
 *
 * A Fully Operational maintenance Page
 *  WordPress
 */

get_header(); ?>
<div class="content_bgr website-maintenance-plan websiteplan-plan">
<div class="full_container_page_title">
<div class="container startNow">
<div class="row no_bm">
<?php
//replace with your URL
$rss = fetch_feed("http://demoinfolink.com/blog/");

if (!is_wp_error($rss)) :

$maxitems = $rss -> get_item_quantity(5); //gets latest 5 items This can be changed to suit your requirements
$rss_items = $rss -> get_items(0, $maxitems);
endif;

//grabs our post thumbnail image
function get_first_image_url($html) {
if (preg_match('/<img.+?src="(.+?)"/', $html, $matches)) {
return $matches[1];
}
}

//shortens description
function shorten($string, $length) {
$suffix = '&hellip;';
$short_desc = trim(str_replace(array("\r", "\n", "\t"), ' ', strip_tags($string)));
$desc = trim(substr($short_desc, 0, $length));
$lastchar = substr($desc, -1, 1);
if ($lastchar == '.' || $lastchar == '!' || $lastchar == '?')
$suffix = '';
$desc .= $suffix;
return $desc;
}
?>
<!--start of displaying our feeds-->
<ul class="rss-items" id="wow-feed">
<?php
if ($maxitems == 0) echo '<li>No items.</li>';
else foreach ( $rss_items as $item ) :
?>
<li class="item">
<span class="rss-image">
<?php echo '<img width="200" src="' . get_first_image_url($item -> get_content()) . '"/>'; ?>
</span>
<span class="data">
<h5><a href='<?php echo esc_url($item -> get_permalink()); ?>' title='<?php echo esc_html($item -> get_title()); ?>'> <?php echo esc_html($item -> get_title()); ?></a></h5>
<span class="date-image">&nbsp;</span>
<small><?php echo $item -> get_date('F Y'); ?></small><!--This can be changed -->
<span class="comment-image">&nbsp;</spa






































































n>







































































<small><?php $comments = $item -> get_item_tags('http://purl.org/rss/1.0/modules/slash/', 'comments'); ?><?php $number = $comments[0]['data']; ?>
<?php //checks and displays comment count
if ($number == '1')
{
echo $number . "&nbsp;" . "Comment";
}
else


























































{


























































echo $number . "&nbsp;" . "Comments";
}
?>
</small>
<p><?php echo shorten($item -> get_description(), '150'); ?></p>
</span>






































</li>






































<?php endforeach; ?>
</ul>

</div>
</div>
</div>
</div>

<?php get_footer(); ?>

add the following to your theme’sfunctions.php

1 2 3 4 5 6 7 8 9 10 11 12 13 14

<?php //add post thumbnails to RSS images function cwc_rss_post_thumbnail($content) {     global $post;     if(has_post_thumbnail($post->ID)) {         $content = '<p>' . get_the_post_thumbnail($post->ID) .         '</p>' . get_the_excerpt();     }     return $content; } add_filter('the_excerpt_rss', 'cwc_rss_post_thumbnail'); add_filter('the_content_feed', 'cwc_rss_post_thumbnail'); ?>

Whilst functions.php is open check for or add the following

PH

P

1	add_theme_support( 'post-thumbnails' );