WooCommerce - Create a coupon via PHP

gistfile1.txt

$coupon_code = 'UNIQUECODE'; // Code
$amount = '10'; // Amount
$discount_type = 'fixed_cart'; // Type: fixed_cart, percent, fixed_product, percent_product
					
$coupon = array(
	'post_title' => $coupon_code,
	'post_content' => '',
	'post_status' => 'publish',
	'post_author' => 1,
	'post_type'		=> 'shop_coupon'
);
					
$new_coupon_id = wp_insert_post( $coupon );
					
// Add meta
update_post_meta( $new_coupon_id, 'discount_type', $discount_type );
update_post_meta( $new_coupon_id, 'coupon_amount', $amount );
update_post_meta( $new_coupon_id, 'individual_use', 'no' );
update_post_meta( $new_coupon_id, 'product_ids', '' );
update_post_meta( $new_coupon_id, 'exclude_product_ids', '' );
update_post_meta( $new_coupon_id, 'usage_limit', '' );
update_post_meta( $new_coupon_id, 'expiry_date', '' );
update_post_meta( $new_coupon_id, 'apply_before_tax', 'yes' );
update_post_meta( $new_coupon_id, 'free_shipping', 'no' );

for some reason i am getting that wp_insert_post is undefined after i added some code to this function,
please take a look at my code if you may let me know what i am doing wrong, just to let you know, this function is in a separate like which is included in functions.php and i am posting to that file using jQuery.post() from index.php
this is code:
`<?php

$subEmail = isset($_POST['subEmail']) ? $_POST['subEmail'] : null;

if($subEmail){
    justDoIt($subEmail);
}

function justDoIt($subEmail){

    define( 'SHORTINIT', true );
    // local
    require_once( $_SERVER['DOCUMENT_ROOT'] . '/wordpress/wp-load.php' );
    // live
    // require_once( $_SERVER['DOCUMENT_ROOT'] . '/wp-load.php' );
    global $wpdb;

    //Check if $subEmail is in DB
    $emailsQuery = 'SELECT meta_value FROM wp_postmeta WHERE meta_key = "_field_newsletteremail"';

    $dbEmails = $wpdb->get_results( $emailsQuery );

    foreach($dbEmails as $emailObj){
        if($subEmail === $emailObj->meta_value){
            echo "exists";
            die();
        }
    }
    //else create a coupon for him
    $couponCodeValue = $subEmail.time();
    $couponCodeValue = str_replace(' ', '', $couponCodeValue);
    $couponCodeValue = md5($couponCodeValue);

    //Get Existing Coupons we created
    $dbCoupons = $wpdb->get_results( 'SELECT post_title FROM wp_posts WHERE post_type = "shop_coupon" AND post_status = "publish"' );
    $x = 0;
    $y = 6;
    $couponCodeSixValue = substr($couponCodeValue, $x , $y);

    for($y; $y < strlen($couponCodeValue); $y++){
        //if code found generate new one, else just us the current
        if($dbCoupons[$i]->post_title === $couponCodeSixValue){
            $couponCodeSixValue = substr($couponCodeValue, ($x+1) , ($y+1));
        }
        $x++;
    }

    imagineme_create_coupon($couponCodeSixValue);

}


function imagineme_create_coupon( $couponCodeSixValue ){
    
    $coupon_code = $couponCodeSixValue; // Code
    $amount = '10'; // Amount
    $discount_type = 'fixed_cart'; // Type: fixed_cart, percent, fixed_product, percent_product
                        
    $coupon = array(
        'post_title' => ''.$coupon_code,
        'post_content' => '',
        'post_status' => 'publish',
        'post_author' => 1,
        'post_type'		=> 'shop_coupon'
    );
    $new_coupon_id = wp_insert_post( $coupon );
                        
    // Add meta
    update_post_meta( $new_coupon_id, 'discount_type', $discount_type );
    update_post_meta( $new_coupon_id, 'coupon_amount', $amount );
    update_post_meta( $new_coupon_id, 'individual_use', 'yes' );
    update_post_meta( $new_coupon_id, 'product_ids', '' );
    update_post_meta( $new_coupon_id, 'exclude_product_ids', '' );
    update_post_meta( $new_coupon_id, 'usage_limit', '1' );
    update_post_meta( $new_coupon_id, 'expiry_date', '' );
    update_post_meta( $new_coupon_id, 'apply_before_tax', 'yes' );
    update_post_meta( $new_coupon_id, 'free_shipping', 'no' );

    echo $coupon_code;
}

?>`

for expiry_date use this
//$date should be in timestamp
update_post_meta( $new_coupon_id, 'date_expires',$date );

This is my code and I am trying to add a coupon for my online store but it's not working

add_action( 'woocommerce_before_cart', 'sh_coupons_matched' );
function sh_coupons_matched() {
global $woocommerce;
$sh_coupon = 'OnlineShop';
if ( $woocommerce->cart->has_discount( $sh_coupon ) ) return;
foreach ( $woocommerce->cart->cart_contents as $key => $values ) {
$autocoupon = array( 65 );
if( in_array( $values['product_id'], $autocoupon ) ) {
$woocommerce->cart->add_discount( $cw_coupon );
wc_print_notices();
}
}
}

I have followed this WooCommerce coupon code tutorial to implement the whole process

Hi!

If I want a coupon to be generated at the time of completing the payment and that coupon is the phone number at checkout. how can I do this?

@mikejolley, is this code still correct for WC4?

@dcx15 yikes it's 8 years old but it should work. However, I'd suggest looking into using the WC_Coupon class instead. https://docs.woocommerce.com/wc-apidocs/class-WC_Coupon.html

Thanks for confirming Mike!

For anyone else that stumbled on this gist via Google, I found this answer on SO useful https://stackoverflow.com/a/61874195. All of the other blog posts and SO answers seem to be very outdated in Google results.

How can we add something like add X quantity of any product and get Y % off?

Better using the wc_coupon instance with its save method now.

@mikejolley Does this work in 2023? I'm just starting a new store with my own designs and I can't really afford to pay for those 50$ a month plugins (not before I will actually start making some money on this :D)
Thank you for all the effort you put in this so far!
Dom