Some example code of how to create a PMPro membership level.

PMPro_Membership_Level.php

<?php
/**
 * Some example code of how to create a PMPro membership level.
 * Uses the PMPro_Membership_Level class and save() method.
 */

// Copy a level.
$level = new PMPro_Membership_Level( 1 );	// Pass the ID of the level to copy.
$level->id = $level->ID = null;				// Clear out the ID, triggers insert on save.
$level->name = 'NewName';					// Update any property you want.
$level->save();								// Save.
$level_id = $level->id;						// The id AND ID properties are updated on save.

// Create a level from scratch.
$level = new PMPro_Membership_Level();
$level->name = 'Fan';
$level->initial_payment = '10.00';
$level->description = 'New description.';
$level->recurring = 'yes';
$level->billing_amount = '10.00';
$level->cycle_number = 1;
$level->cycle_period = 'Month';
$level->save();
$level_id = $level->id;