What potential issues can arise when using special characters like plus signs in URLs in PHP?

Special characters like plus signs in URLs can cause encoding issues because they are reserved characters with special meanings in URLs. To solve this problem, you can encode the special characters using the urlencode() function in PHP before including them in the URL. 

$special_character = "+";
$encoded_character = urlencode($special_character);
$url = "http://example.com/page.php?param=" . $encoded_character;
echo $url;

Keywords

URL encoding PHP urlencode function URL decoding special characters URL validation

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