Add meta boxes to the Testimonials WordPress CPT

meta_boxes_for_testimonials_cpt.php

<?php /**
 * Adds a custom meta box to the Testimonials editor page for collecting
 * Testimonial meta.
 * Refer to: https://gist.github.com/1971046 for the Custom Post Type Setup
 *
 * @since 1.0
 */
function sennza_add_meta_boxes() {
	add_meta_box( 'sennza_testimonials_meta_box', __( 'Testimonial Details' ), 'sennza_testimonials_meta_box', 'testimonial', 'side', 'core' );
}
add_action( 'add_meta_boxes', 'sennza_add_meta_boxes' );


/**
 * The contents of our custom meta box.
 *
 * @since 1.0
 */
function sennza_testimonials_meta_box() {
	global $post_ID;

	echo '<div id="testimonial_meta">';
	wp_nonce_field( plugin_basename( __FILE__ ), 'sennza_testimonial_nonce' );

	$parent_type     = get_post_meta( $post_ID, 'parent_type', true );
	$parent_name     = get_post_meta( $post_ID, 'parent_name', true );
	$child_name      = get_post_meta( $post_ID, 'child_name', true );
	$parent_location = get_post_meta( $post_ID, 'parent_location', true );

	// Mum or Dad ?>
	<p>
		<label for="parent_type" style="width:30px; display:inline-block;"><?php _e( 'Mum:' ); ?></label>
		<input type="radio" id="parent_type" name="parent_type" value="mum" style="width:20px; display:inline-block;" <?php checked( 'mum', $parent_type ); ?>/>
		<label for="parent_type" style="width:30px; display:inline-block;"><?php _e( 'Dad:' ); ?></label>
		<input type="radio" id="parent_type" name="parent_type" value="dad" style="width:20px; display:inline-block;" <?php checked( 'dad', $parent_type ); ?>/>
	</p>
	<?php
	// Parent's Name ?>
	<p>
		<label for="parent_name" style="width:80px; display:inline-block;"><?php _e( "Parent's Name:" ); ?></label>
		<input type="text" id="parent_name" name="parent_name" value="<?php echo $parent_name; ?>" size="25" />
	<?php
	// Childen's Names ?>
	<p>
		<label for="child_name" style="width:80px; display:inline-block;"><?php _e( "Child's Name:" ); ?></label>
		<input type="text" id="child_name" name="child_name" value="<?php echo $child_name; ?>" size="25" />
	<?php
	// Location ?>
	<p>
		<label for="parent_location" style="width:80px; display:inline-block;"><?php _e( "Location:" ); ?></label>
		<input type="text" id="parent_location" name="parent_location" value="<?php echo $parent_location; ?>" size="25" />
	</div>
	<?php
}


/**
 * Save the meta associated with a testimonial
 *
 * @since 1.0
 */
function sennza_save_testimonial_meta() {

	if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
		return;

	if ( empty( $_POST[ 'sennza_testimonial_nonce' ] ) || ! wp_verify_nonce( $_POST['sennza_testimonial_nonce'], plugin_basename( __FILE__ ) ) )
		return;

	update_post_meta( $_POST[ 'ID' ], 'parent_type', $_POST[ 'parent_type' ] );
	update_post_meta( $_POST[ 'ID' ], 'parent_name', $_POST[ 'parent_name' ] );
	update_post_meta( $_POST[ 'ID' ], 'child_name', $_POST[ 'child_name' ] );
	update_post_meta( $_POST[ 'ID' ], 'parent_location', $_POST[ 'parent_location' ] );
}
add_action( 'save_post', 'sennza_save_testimonial_meta' ); ?>