CSS样式不适用于PHP

Question

I have a variable

 $mail_body = array(
    'text/html' => 
    '<style> .fb_term { font-weight:bold;
border-bottom: 1px solid #999999;    
}</style>' );

and inside my code I do this

$mail_body['text/html'] .= $a;
$a ='How <span class="fb_term" >Assist</span> me Please <span class="fb_term" >Grad</span>'

I get the mail but the styling is not done,

What could be the problem?

Answer 1

The problem could be e-mail HTML, which is notoriously difficult to style. Don't use classes, use inline styles for every bit of CSS.

How <span style="font-weight:bold; border-bottom: 1px solid #999999;" >Assist</span> me Please <span style="font-weight:bold; border-bottom: 1px solid #999999;" >Grad</span>