如何在href中间添加变量？

Question

I am trying to take this link below which is a search query and pull the item sku in woocommerce to be put in place of when they click the link. The code below is used to display a link in our store whenever an item is up for auction. How would I add $product->get_sku() in the middle of an href? I've tried multiple ways. Everything I find online about variable href only shows if the entire href is a variable. Any help is greatly appreciated.

https://www.wirebids.com/search?q= "VARIABLE HERE"&open_closed=open

// Display Auction Link When 'auction' is in the category
function so_43372512_maybe_show_auction_link(){
if( has_term( 'auction', 'product_cat' ) ) {
    echo ' <style type="text/css">
                .woocommerce div.product form.cart, .woocommerce div.product p.cart {
                display:none ; }
                .woocommerce div.product p.price, .woocommerce div.product span.price {
                display:none ; }
                .woocommerce div.product p.stock {
                display:none ; }
                .product_meta {
                margin-top:20px;
                }
            </style>';
    echo 'Click This Button To View The Lot         ';
    $skusearch = $product-get_sku();
    echo '<a id="auction" style="font-size:100%;color:#fff;padding:.618em 1em;border-radius:3px;background-color:#ed1c24;font-weight:700;" href="https://www.wirebids.com/search?q=' . $skusearch . '&open_closed=open" target="blank">' . __ ( 'On Auction Now!', 'your-plugin' ) . '</a>';
}
}'

I updated my code to show you what I have going on. Adding the variable where I have it breaks the function. Feeling pretty dumb right now lol.

Answer 1

Like this

$VARIABLENAME = $product->get_sku();
echo '<a href="https://www.wirebids.com/search?q=' . $VARIABLENAME . '&open_closed=open" style="font-size:100%;color:#fff;padding:.618em 1em;border-radius:3px;background-color:#ed1c24;" target="blank">' . __ ( 'On Auction Now!', 'your-plugin' ) . '</a>'

Or swap the quotes you are using to do

$VARIABLENAME = $product->get_sku();
echo "<a href='https://www.wirebids.com/search?q=$VARIABLENAME&open_closed=open' style='font-size:100%;color:#fff;padding:.618em 1em;border-radius:3px;background-color:#ed1c24;' target='blank'>" . __ ( 'On Auction Now!', 'your-plugin' ) . '</a>'

Answer 2

You can use this:

$var = $product->get_sku();
echo '<a style="font-size:100%;color:#fff;padding:.618em 1em;border-radius:3px;background-color:#ed1c24;" href="https://www.wirebids.com/search?q=' . $var . '&open_closed=open" target="blank">' . __ ( 'On Auction Now!', 'your-plugin' ) . '</a>';