在PHP中避免相等和符号转换

Question

I have a php variable containing some special characters, inside a Codeigniter 3 controller:

page_url = 'search=' . $expression . '&page';

In a template, I use this variable:

<a href="<?php echo $page_url; ?>"></a>

In the in the browser I see the characters mentioned above in this form:

posts/search?search%3Dharum%26page=2

The = sign turns to %3D, "&" to %26.

I tried page_url = urldecode($page_url); but it does not work.

How do I keep the original characters?

Answer 1

Please use utf8 decode and try again

echo utf8_decode(urldecode("search%3Dharum%26page=2"));

Try this decode function.

function decode($url)
{
    $special = array(
        '%21' => '!', '\\' => '%5C', // so on you need to define.
    );

    foreach($special as $key => $value)
    {
        $result = str_replace($key, $value, $url);
    }

    return $result;
}

echo decode("search=%21");