String appears to be valid JSON, but `json_decode()` returns NULL

Question

I think I\'ve found where the error lies:

    $convertJSON = file_get_contents(\"http://www.google.com/ig/calculator?hl=en&q=\" . $currencyValue . $curre         


        

Answer 1

strip it of everything but decimal points, commas, and numbers, and give me a result.

Actually you do the exact contrary with your regex. Add a ^ after [: [^ to negate it

$currencyValue = preg_replace('/([^0-9\.,]+)/', '', $currencyValue);