How can the display of smilies in TinyMCE be ensured when sending emails in PHP?

To ensure that smilies are displayed correctly in TinyMCE when sending emails in PHP, you can use the htmlspecialchars_decode function to decode the HTML entities back to their original characters before sending the email. 

// Retrieve the content from TinyMCE
$content = $_POST['content'];

// Decode HTML entities to display smilies correctly
$content = htmlspecialchars_decode($content);

// Send email with the decoded content
// Add your email sending code here

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