Wordpress save only last custom field - php

Question

I want to have three dropdown list that allow user select Author, Post and Testimonial. But wordpress only save last dropdown.
This is first dropdown:
//allow authors list on posts
add_action( 'add_meta_boxes', 'author_list_add' );
function author_list_add() {
add_meta_box( 'my-meta-box-id', 'Post Author', 'author_list', 'post', 'normal', 'high' );
}
function author_list( $post ) {
$values = get_post_custom( $post->ID );
$selected = isset( $values['custom_author'] ) ? esc_attr( $values['custom_author'][0] ) : '';
wp_nonce_field( 'my_meta_box_nonce', 'meta_box_nonce ');
?>
<p>
<label for="custom_author">Select author</label>
<br>
<select name="custom_author" id="custom_author">
<option value="0" <?php selected( $selected, '0' ); ?>>No author</option>
<?php
$args = array('post_type' => 'member');
$loop = get_posts($args);
foreach ($loop as $post) : setup_postdata($post);
$name = $post->post_title;
$link = $post->ID;
?>
<option value="<?php echo $link; ?>" <?php selected( $selected, $link ); ?>><?php echo $name; ?></option>
<?php
endforeach;
?>
</select>
</p>
<?php
}
add_action( 'save_post', 'author_list_save' );
function author_list_save( $post_id ) {
// Bail if we're doing an auto save
if( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return;
// if our nonce isn't there, or we can't verify it, bail
if( !isset( $_POST['meta_box_nonce'] ) || !wp_verify_nonce( $_POST['meta_box_nonce'], 'my_meta_box_nonce' ) ) return;
// if our current user can't edit this post, bail
if( !current_user_can( 'edit_post' ) ) return;
// now we can actually save the data
$allowed = array(
'a' => array( // on allow a tags
'href' => array() // and those anchords can only have href attribute
)
);
// Probably a good idea to make sure your data is set
if( isset( $_POST['custom_author'] ) )
update_post_meta( $post_id, 'custom_author', esc_attr( $_POST['custom_author'] ) );
}
The second Part:
//allow select testimonial list on posts
add_action( 'add_meta_boxes', 'testimonial_select_box_add' );
$types = array( 'post', 'page' );
function testimonial_select_box_add() {
add_meta_box( 'testimonial-box', 'Testimonial in bottom row', 'testimonial_select_box', $types, 'normal', 'high' );
}
function testimonial_select_box( $post ) {
$values = get_post_custom( $post->ID );
$selected = isset( $values['testimonial_select'] ) ? esc_attr( $values['testimonial_select'][0] ) : '';
wp_nonce_field( 'testimonial_meta_box_nonce', 'meta_box_nonce' );
?>
<p>
<label for="testimonial_select">Select Testimonial</label>
<br>
<select name="testimonial_select" id="testimonial_select">
<option value="0" <?php selected( $selected, '0' ); ?>>None</option>
<?php
$args = array('post_type' => 'testimonial','posts_per_page' => -1);
$loop = get_posts($args);
foreach ($loop as $post) : setup_postdata($post);
$name = $post->post_title;
$link = $post->ID;
?>
<option value="<?php echo $link; ?>" <?php selected( $selected, $link ); ?>><?php echo $name; ?></option>
<?php
endforeach;
?>
</select>
</p>
<?php
}
add_action( 'save_post', 'testimonial_select_box_save' );
function testimonial_select_box_save( $post_id ) {
// Bail if we're doing an auto save
if( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return;
// if our nonce isn't there, or we can't verify it, bail
if( !isset( $_POST['meta_box_nonce'] ) || !wp_verify_nonce( $_POST['meta_box_nonce'], 'testimonial_meta_box_nonce' ) ) return;
// if our current user can't edit this post, bail
if( !current_user_can( 'edit_post' ) ) return;
// now we can actually save the data
$allowed = array(
'a' => array( // on allow a tags
'href' => array() // and those anchords can only have href attribute
)
);
// Probably a good idea to make sure your data is set
if( isset( $_POST['testimonial_select'] ) )
update_post_meta( $post_id, 'testimonial_select', esc_attr( $_POST['testimonial_select'] ) );
}
And last one:
//allow select Post list on posts
add_action( 'add_meta_boxes', 'post_select_box_add' );
function post_select_box_add() {
add_meta_box( 'post-box', 'Post in bottom row', 'post_select_box',$types, 'normal', 'high' );
}
function post_select_box( $post ) {
$values = get_post_custom( $post->ID );
$selected = isset( $values['post_select'] ) ? esc_attr( $values['post_select'][0] ) : '';
wp_nonce_field( 'post_meta_box_nonce', 'meta_box_nonce' );
?>
<p>
<label for="post_select">Select Post</label>
<br>
<select name="post_select" id="post_select">
<option value="0" <?php selected( $selected, '0' ); ?>>None</option>
<?php
$args = array('post_type' => 'post','posts_per_page' => -1);
$loop = get_posts($args);
foreach ($loop as $post) : setup_postdata($post);
$name = $post->post_title;
$link = $post->ID;
?>
<option value="<?php echo $link; ?>" <?php selected( $selected, $link ); ?>><?php echo $name; ?></option>
<?php
endforeach;
?>
</select>
</p>
<?php
}
add_action( 'save_post', 'post_select_box_save' );
function post_select_box_save( $post_id ) {
// Bail if we're doing an auto save
if( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return;
// if our nonce isn't there, or we can't verify it, bail
if( !isset( $_POST['meta_box_nonce'] ) || !wp_verify_nonce( $_POST['meta_box_nonce'], 'post_meta_box_nonce' ) ) return;
// if our current user can't edit this post, bail
if( !current_user_can( 'edit_post' ) ) return;
// now we can actually save the data
$allowed = array(
'a' => array( // on allow a tags
'href' => array() // and those anchords can only have href attribute
)
);
// Probably a good idea to make sure your data is set
if( isset( $_POST['post_select'] ) )
update_post_meta( $post_id, 'post_select', esc_attr( $_POST['post_select'] ) );
}
as you can see, function and ID names are unique, but only last one saved.
this is what happened when I save :

Answer 1

As per my comment, each of your nonces seems to have the same name (meta_box_nonce), so there may be a clash if all three fields are submitted in the same form. Trying giving them unique names (in both your wp_nonce_field and wp_verify_nonce calls).