通过POST将PHP字符串发送到PHP。 在回收它时得到奇怪的字符

Question

So I am making a simple script where I send a HTML string via POST to PHP and when I try to echo it out it gets encoded with some weird characters

The string Im sending:

'Yo <i>whats up</i>'

What I get when I echo it out with PHP

Yo+%3Ci%3Ewhats+up%3C%2Fi%3E 

What is going on here? Is there some PHP method I can use to revert it back to the original HTML string?

Answer 1

You want to use

echo htmlspecialchars(urldecode('Yo+%3Ci%3Ewhats+up%3C%2Fi%3E'));

The reason is that your data gets x-www-form-urlencoded for posting. So on the server-side, you have to decode it again - that's what urldecode() does.

htmlspecialchars() prevents your HTML-Tags to be rendered as such so they are just displayed as a string (if that's what you want).

So, in an HTML context, echo urldecode('Yo+%3Ci%3Ewhats+up%3C%2Fi%3E'); would output

Yo whats up

And if you also wrap it with htmlspecialchars(), your output would be

Yo <i>whats up</i>

again.