custom-meta-post-test.php

<?php
/*
Plugin Name: Custom Meta Test
*/
new CustomMetaTest;
class CustomMetaTest
{
	function __construct()
	{
		add_action( 'add_meta_boxes' , array($this , 'metaboxDefination') );
		add_action( 'save_post', array($this , 'metaboxSave' ) ); 
		add_shortcode( 'getmetaval' , array($this , 'get_meta_box_value') );		
	}
	
	function metaboxDefination()
	{
	    add_meta_box( 'my-meta-box-1', 'First Meta Box', array($this , 'meta_box_one' ), 'post', 'normal', 'high' );
	    add_meta_box( 'my-meta-box-2', 'Second Meta Box', array($this , 'meta_box_two' ), 'post', 'normal', 'high' );
	}

	function meta_box_one()
	{
		$values = get_post_custom( $post->ID );
		$text = isset( $values['my_meta_box_text'] ) ? esc_attr( $values['my_meta_box_text'][0] ) : '';
    ?>
	    <p>
	        <label for="my_meta_box_text">Text Label</label>
	        <input type="text" name="my_meta_box_text" id="my_meta_box_text" value="<?php echo $text; ?>" />
	    </p>
    <?php    
	}

	function meta_box_two()
	{
		$values = get_post_custom( $post->ID );
		$text = isset( $values['my_meta_box_text2'] ) ? esc_attr( $values['my_meta_box_text2'][0] ) : '';
    ?>
	    <p>
	        <label for="my_meta_box_text2">Text Label</label>
	        <input type="text" name="my_meta_box_text2" id="my_meta_box_text" value="<?php echo $text; ?>" />
	    </p>
    <?php   
	}	

	function metaboxSave( $post_id )
	{	
	    if( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return;
	    if( !current_user_can( 'edit_post' ) ) return;
	    $allowed = array( 
	        'a' => array(
	            'href' => array() 
	        )
	    );

	    if( isset( $_POST['my_meta_box_text'] ) )
	        update_post_meta( $post_id, 'my_meta_box_text', wp_kses( $_POST['my_meta_box_text'], $allowed ) );
	    
	    if( isset( $_POST['my_meta_box_text2'] ) )
	        update_post_meta( $post_id, 'my_meta_box_text2', wp_kses( $_POST['my_meta_box_text2'], $allowed ) );	    
	}	

	function get_meta_box_value( $atts )
	{
		extract( shortcode_atts( array(
			'key' => '',
		), $atts ) );				
		$values = get_post_custom( $post->ID );
		$metabox_value = isset( $values[$key] ) ? esc_attr( $values[$key][0] ) : '';			
		return $metabox_value;
	}			
}	
?>