How to Handle Unicode Characters in URL Decoding for PHP?

Troubleshooting URL Decoding in PHP

URL decoding in PHP using the urldecode function may return unexpected results when dealing with Unicode characters. To decode a URL string containing UTF-8 encoded characters, we need to combine urldecode with utf8_decode.

Example:

Consider the URL string:

Ant%C3%B4nio+Carlos+Jobim

This string represents the Unicode character Antônio. When we try to decode it using urldecode only:

urldecode("Ant%C3%B4nio+Carlos+Jobim");

It results in:

Antônio Carlos Jobim

To fix this, we first need to decode the URL encoding and then the UTF-8 encoding:

echo utf8_decode(urldecode("Ant%C3%B4nio+Carlos+Jobim"));

This will correctly output the expected string:

Antônio Carlos Jobim

Remember, when dealing with URLs that contain Unicode characters, it's essential to use both urldecode and utf8_decode to ensure proper decoding.

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