php is incorrectly converting ¬ in strings to ¬

Question

I need to make up a simple string in PHP which is a string of data to be posted to another site.

The problem is that one of the fields is \'notify_url=..\' and when I u

Answer 1

PHP isn't doing that, it's your browser interpreting HTML entity notation. & has a special meaning in HTML as the start of an HTML entity, and ¬ happens to be a valid HTML entity. You need to HTML-encode characters with special meanings:

echo htmlspecialchars($string);
// field1=1234&field2=this&notify_url=http