<?php 
add_action( 'wp_ajax_grab_posts', 'grab_posts' );
add_action( 'wp_ajax_nopriv_grab_posts', 'grab_posts' );
function grab_posts(){
	
	$paged = isset($_REQUEST['p']) ? $_REQUEST['p'] : 1;
	
	$args = array(
		'post_type' => array('post_type1', 'post_type2'),
		'post_status'=>'publish',
		'orderby' => 'ASC',
		'posts_per_page' => 5 ,
		 'paged' => $paged,
	 );
     $post_query = new WP_Query( $args );	
		
  if ( $post_query->have_posts() ) { 
		while ( $post_query->have_posts() ) { 
			$post_query->the_post();
	
		 $post_img ='';
		if ( has_post_thumbnail() ) {
		       $post_img = wp_get_attachment_url( get_post_thumbnail_id() );
           }
		   $author = get_the_author();
   ?>
		<div class="owl-item" >
    <a class="no-ajax a_img_carousel" id="effect_hover" onclick="effect_hover('<?php echo $post->ID;?>','hover_effect','#effect_hover_box'); return false;" data-id="<?php the_ID(); ?>" href="<?php the_permalink(); ?>" >
        <img title="<?php echo $post->post_title; ?> " rel="tooltip"  data-title="<?php echo $post->post_title; ?>" src="<?php the_post_thumbnail_url( 'medium' ); ?>"  />
    </a>
</div>
		      
	<?php
			}
			} else {
				echo 300; 
				}
	die;
	
}
/* add ajax url for wordpress in head section*/
 add_action('wp_head','loadscriptfnc');
 function loadscriptfnc(){
	 
	 echo '<script>var ajaxurl="'.admin_url('admin-ajax.php').'"; </script>';
 }
	?>