Create a single-use Commerce coupon programmatically

single-use-commerice-coupon-create.php

<?php

/**
 * Create a single-use Commerce coupon programmatically
 */

// Get all available coupon types
// $types = commerce_coupon_get_types();

// Create a default coupon instance
$coupon = commerce_coupon_create('example_coupon_type');

// Generate an unique, six-character "coupon code"
$coupon_code = strtoupper(commerce_coupon_generate_coupon_code(6));

// Set the coupon's values and conditions
$coupon->commerce_coupon_code[LANGUAGE_NONE][0]['value'] = $coupon_code;
$coupon->commerce_discount_reference[LANGUAGE_NONE][0]['target_id'] = 4;
$coupon->commerce_coupon_conditions[LANGUAGE_NONE][0] = array(
  'condition_name' => 'commerce_coupon_usage_evaluate_usage',
  'condition_settings' => array(
    'max_usage' => 1
  )
);

// Save the new coupon
commerce_coupon_save($coupon);

// Check Coupon
$coupon = commerce_coupon_load_by_code($coupon_code);