WordPress get first image from post

To display the first image from the post content use the following function given.

First open your active theme's functions.php file in a code editor. After opening the file in the code editor add the following function at the end of the file.

<?php
function get_first_image() {
 global $post, $posts;
 $first_img = '';
 ob_start();
 ob_end_clean();
 $output = preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i', $post->post_content, $matches);
 $first_img = $matches [1] [0];

 if(empty($first_img)){ //Defines a default image
$first_img = "/images/default.jpg";
 }
 return $first_img;
}
?>

Save the file and upload it back to the server.

The function can be called in the loop or anywhere to display the first image from the post.

<?php echo catch_that_image() ?>


WordPress get parent categories

WordPress supports Categories. A Post can be assigned to single or multiple categories in WordPress. Also categories can be single level or multi level (nested). To get only parent categories and exclude the child categories the following code can be used.

<?php
$args = array(
 'orderby' => 'name',
 'parent' => 0
);

$categories = get_categories($args);
?>

$categories contains all the parent level categories only.

WordPress get featured image by post id

In WordPress there is featured image for Post and Pages and Custom Post types.

To get the feature image of an post or page or custom post type use the following code.

<?php if (has_post_thumbnail( $post->ID ) ):
$image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'single-post-thumbnail' );
 endif;
?>

Now in $image you have all the feature image information. To display the image you can do it as follows:

<img src="<?php echo $image[0]; ?>" />

And you are done. Now feature image will be displayed.

WordPress get blog name

Wordpress is a blogging CMS. But now WordPress is used for many other purpose like shopping cart, gallery sites, portfolio site etc.

This all have been possible with the available plugins and themes and WordPress support community.

If you want to get the WordPress site name then you can get it in the following way.

<?php echo get_bloginfo( 'name' ); ?>

Using the above line any where in the file will give you the WordPress site/blog name.

WordPress get ajax full url

In Wordpress we can get the full Ajax url as follows:

In PHP we can get it in the following way.

<?php echo admin_url('admin-ajax.php'); ?>

If you want to use it in Javascript then you can use it in following way.

<script type="text/javascript">
    var ajaxurl = "<?php echo admin_url('admin-ajax.php'); ?>";
</script>


WordPress get user data

In WordPress there are many users with different roles. A user may have a administrator role, author or any other roles from the standard roles defined by WordPress.

If you want to find out user role or user information such as name,ID etc you can use the following function.

<?php
 $user_info = get_userdata(1);
          echo 'Username: ' . $user_info->user_login . "\n";
          echo 'User roles: ' . implode(', ', $user_info->roles) . "\n";
          echo 'User ID: ' . $user_info->ID . "\n";
?>

The above will give you user's username, role and ID.

WordPress get admin email address

In WordPress there is a administrator who manages pages, posts and every content of the site.

He can also manage and provide roles to other users. If you want to the get the email address of the site administrator you can use the following function.

<?php
$admin_email = bloginfo('admin_email');
?>

$admin_email will give you the email address of the site administrator.

WordPress get active menu item

In WordPress menu are dynamically managed. User can set Primary Header and footer menu from admin section.

If you want to get the current Menu item name you can get it by using the following function.

Open your active theme's functions.php and add the following function at the bottom of the file.

<?php
function Get_menu_item_name( $loc ) {
global $post;
$locs = get_nav_menu_locations();
$menu = wp_get_nav_menu_object( $locs[$loc] );

if($menu) {
$items = wp_get_nav_menu_items($menu->term_id);

foreach ($items as $k => $v) {          
if ($items[$k]->object_id == $post->ID) {
$name = $items[$k]->title;
break;
}
}
}
return $name;
}
?>

The usage of the function is as follows:

<?php
$current_menu_name = Get_menu_item_name( 'primary' ); // here you enter another alias if your menu is not primary
echo $current_menu_name;
?>

$current_menu_name will contain the value of the current menu name.

WordPress get active plugin url

In WordPress to get the active plugin URL we can use the following code.

<?php $plugin_url = plugin_dir_url( $file ); ?>

$plugin_url will give you the current active plugin URL.

WordPress get current plugin directory path

While working with plugins sometimes we need the plugin directory path. WordPress provides a way to get the plugin current directory path.

use the following code which gives the plugin current directory path.

<?php $plugin_dir_path = dirname(__FILE__); ?>

$plugin_dir_path will give you the current plugin directory path.