避免将空格从mailto 链接更改为iPhone 中的加号

Question

I have a php code that renders a mailto: link

echo "<a href='mailto:?'". http_build_query([
   'subject' => 'this is a subject',
   'body' => 'this is a body',
])."'>Link</a>";

In my desktop browser, when I clicked the link the browser goes to GMail and the mail body is rendered nicely.

But when I use my iPhone, the compose app shows "+" instead of spaces.

How can I avoid this?

Answer 1

This is standard URI code. Spaces are expected to be transformed to something else than a space. The most common character is the '+', some people prefer to use %20.

When you decode a URI, it automatically replaces the '+' back to spaces. So your code is probably missing that one call...

You probably want to look at this function:

http://us1.php.net/manual/en/function.urldecode.php

---

According to scrowler comment, try to put %20 instead of spaces to see what happens:

echo "<a href='mailto:?'". http_build_query([
   'subject' => 'this%20is%20a%20subject',
   'body' => 'this%20is%20a%20body',
])."'>Link</a>";

Answer 2

For building the mailto http query string to be compatible with Apple mail and not show spaces as + plus signs you need to use the encoding_type param in the http_build_query function and set it to constant PHP_QUERY_RFC3986 so that spaces are encoded with the %20 instead of + .

Build the mailto query string:

$mailToParams = http_build_query(
    [
        'subject' => "The Subject!",
        'body' => "Here's the body of the message. \n\nAdd in a couple new lines."
    ],
    null,
    '&',
    PHP_QUERY_RFC3986
);

Add it to your link:

<a href="mailto:info@example.com?<?php echo $mailToParams; ?>">Mail Me</a>