Meta Box

Dont mind the errors, it is because I removed the square brackets, but left it as

// start customer
    $meta_boxes = array(

instead of

// start customer
    $meta_box = array(

removing square brackets, [] breaks my site completely

Yes, I have loads.

This is the full code for my quote cpt

https://pastebin.com/YiLH0HWv

Thanks Tan, I am still trying to break down your code and get it to work, can I ask another question?

In my contact post type, my prefix for the phone is p52_contact_ to give me the id p52_contact_phone, and given that nothing is working (field not being shown nor any value in it) I am assuming something in here is wrong

// Save data to phone field
add_action('rwmb_before_save_post', function($post_id)
{
	// Get person ID to save from "Select a Customer" field
	$person_to_save = intval( $_POST['p52_quote_name'] );
	// Save related field to phone field
	$_POST['p52_quote_phone'] = $_POST['p52_quote_phone_' . $person_to_save];
	// Unset all hidden fields
	foreach ( $_POST as $key => $value )
	{
		if ( strpos( $key, 'p52_quote_phone_' ) )
			unset( $_POST[$key] );
	}
} );

also, if I do a var_dump ($customers) I dont get any of the metabox fields, so I must have something wrong with loading them into the loop when creating my cpt

I get an error installing conditional logic

Cant seem to get my head around how I can use the conditional logic.

I can see how it makes different elements visible but that is now what I am after (unless I am thinking this wrong?)

I want to look at the post selector

$name = rwmb_meta( 'p52_quote_name', 'type=text' );

and then take that and return the associated phone number to that contact
$phone = rwmb_meta( 'p52_contact_phone', 'type=text' );

So I could have something sort of like this (which is totally incorrect, I know)

<?php

function p52_register_quote_meta_boxes( $meta_boxes ) {

$prefix = 'p52_quote_';
$meta_boxes[] = array(
'id' => $prefix . 'customer',
'title' => 'Customer Info',
'pages' => 'p52-quote',
'context' => 'normal',
'priority' => 'low',

'fields' => array(

array(
'name' => 'Name',
'id' => $prefix . 'name',
'type' => 'post',
'post_type' => 'p52-contact',
'placeholder' => 'Select a Customer',
'columns' => 6
),

array(
'name' => 'Phone',
'id' => $prefix . 'phone',
'post_type' => 'p52-contact',
'std' => get_post_meta($post->ID, 'p52_quote_phone', true),
'type' => 'text',
'columns' => 6
),
return $meta_boxes;
}

add_filter( 'rwmb_meta_boxes', 'p52_register_quote_meta_boxes' );

Got it

$images = rwmb_meta( 'p52_gallery_image', 'type=image' );
if ($random == 'true') {
shuffle($images);
}
foreach ( $images as $image ) {

}