WooCommerce - Change price display in cart - php

Question

First, thanks for your time.
We have certain products we offer a payment plan with, and it includes a $1 30day trial.
When a user adds a product to the cart with the "payment plan" category (id=41 below), I want the cart to display the price as $1 then X payments of $xx.xx. The back end only needs to pass the product SKU so this is purely for display reasons.
This code works, but loops for however many items are in the cart. Is there a way for me to stop the loop as soon as it senses the "payment plan" product category?
The Code:
<td><?php
function check_payment() {
//Check to see if user has product in cart
global $woocommerce;
//assigns a default negative value
$contains_special = false;
$wccart= WC()->cart->get_cart();
if ( !empty( $wccart ) ) {
foreach ( WC()->cart->get_cart() as $cart_item ) {
function is_item_special( $product_id ){
if( has_term( 'payment-plan', 'product_cat', $product_id ) ) {
return TRUE;
} else {
return false;
}
}//function
if ( is_item_special( $cart_item['product_id'] ) ) {
$contains_special = true;
$firstpayment = get_post_meta( $_product->id, 'firstpayment', true );
$getsubtotal = WC()->cart->get_cart_subtotal(); //get cart subtotal
$trimbefore = str_replace('<span class="amount">$', "", $getsubtotal); //$getsubtotal returns <span class="amount>XX.XX</span> this trims off the opening span tag
$intsubtotal = str_replace('</span>', "", $trimbefore); //trim closing span tag
$formatsubtotal = number_format((float)$intsubtotal, 2, '.', '');//makes an integer
$numberofpayments = get_post_meta( $_product->id, 'payments', true );
$afterfirsttotal = $formatsubtotal - 1.00;
$paymentamount = number_format((float)$afterfirsttotal, 2, '.', '') / $numberofpayments;
echo '$' . $firstpayment . '<br/> then ' . $numberofpayments . ' payments of $' . number_format((float)$paymentamount, 2, '.', '');
break;
} else {
wc_cart_totals_subtotal_html();
}//if/else statement
}//foreach loop
} //if cart isn't empty
} //function
?>
I'm semi-new to PHP and still trying to understand some things, so sorry if this is just obvious!

Answer 1

Here is something that I have used in the past (slightly modified from when I was checking for a product with a particular post meta field). From what I can tell from your question, it seems that you are looking for break which is how to quit a foreach loop once a particular condition has been satisfied.
The first function loops through the cart items looking for any item that matches our criteria. Note the if ( ! empty( WC()->cart->get_cart() ) ) which prevents the code from running on an empty cart.... which was the cause of the foreach error you were seeing earlier.
The second function checks a product for a particular condition: in your case whether or not it has a specific product category assigned. This could easily be handled inside the first function, but I refactored it out for readability.
/*
* loop through cart looking for specific item
*/
function kia_check_cart_for_specials() {
$contains_special = false;
if ( ! empty( WC()->cart->get_cart() ) ) {
foreach ( WC()->cart->get_cart() as $cart_item ) {
if ( kia_is_item_special( $cart_item['product_id'] ) ) {
$contains_special = true;
break; // found a special item so we can quit now
}
}
}
return $contains_special;
}
/*
* check if an item has special category
* change the term/condition to suit your needs
*/
function kia_is_item_special( $product_id ){
if( has_term( 'special-category', 'product_cat', $product_id ) ) {
return TRUE;
} else {
return false;
}
}