“mailto” is used for email link in website but when we pass “&” or “?” in subject or body parameter then it ignores data after tag.
Read about mailto : mailto : Create e-mail link in website
See below example.
<a href="”mailto:firstname.lastname@example.org?subject=This">Send email</a>
In above case, clicking on Send email link will open new mail window but it will show only “This is chetan, sabin ” in subject of mail as browser will consider & as parameter seperator.
To avoid this problem, you should use “%26” instead of “&”. You can use str_replace function for this in php.
Now, above example will be look like this which will work as you need.
<a href=”mailto:email@example.com?subject=This is chetan, sabin %26 sujeesh&body=body line comes here”>Send email</a>
For Question Mark “?”, you can use “%3F”.
For php, it would be good practice if you use urlencode function to encode subject and body text.