Add value from string to Google Ads as conversion value issue

On my website i generate leads via iframe forms. Based on the 'thank you page' i add an value to the url string like:

https//www.website.nl/thank-you?ids=5

the ids value of 5 is the value from the lead conversion (let's say $5,-)

with this script i push the value to Google Ads.

    <?php if ( is_page(123) ) {
if (isset($_GET["ids"]) && (is_numeric($_GET["ids"])) ) {     
   $value = (float)str_replace(",",".",$_GET["ids"]);   
   $value = sprintf("%01.2f", $value);
}else{      
   $value = sprintf("%01.2f", 0); 
}

echo '<script> 
gtag("event", "conversion", {
   "send_to": "AW-*****",    
   "value": '. $value .', 
   "currency": "EUR"  });
</script>'; 
}?>

The above code worked great until my partner added automaticly a lead ID on the end of the url. now the thank-you url is e.g. https//www.website.nl/thank-you?ids=5&id=12345

Now my script won't work anymore... how to fix? any ideas? probably i can't add my ids to the end of the url, because i need to fill in the thank-you url in the iframe static.

hope anyone can help me out to measure conversion values again and send them over to Google Ads :)

You should look at the way your partner is adding the new parameter. It should look something like this :

https//www.website.nl/thank-you?ids=5&id=12345

Read this for details about Query string structures.