Correct combination of escape characters to inject PHP in javascript? -

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i've tried combination know of can't right!

echo  <<<eof       <a href="javascript:popup('$comments')">popup!</a>     eof;

i want pass string contained in $comments popup, can't seem right combination of escape characters , concatenation. pls!

tia

edit: html goes string mentioned. 

$comments.= "<b>" . $row['comname'] . "</b><br><i>" . $row['comment'] . "</i><br><br>";

you need escape string valid javascript/json first preserve javascript syntax, escape javascript preserve syntax of html it's embedded in:

$js = sprintf('javascript:popup(%s)', json_encode($comments)); printf('<a href="%s">popup!</a>', htmlspecialchars($js));

since quite pain, should try go unobtrusive javascript, separates javascript html.


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