php quotes in quote in quotes

Question

I have the following code:

echo "<script type='text/javascript'>
iframe0document.getElementById('jform_articletext').value = '<?php echo \"<p align='center'><iframe src='aufgaben/'+cookieValue+'/'+cookieValue+'.html' width='322' height='497' frameborder='0'></iframe></p>\";?>';}</script>";

but it has a problem with the quotes, I tried almost everything but it says always:

Parse error: syntax error, unexpected T_STRING, expecting ',' or ';' in /usr/www/users/mathea/joomla/plugins/content/DirectPHP/DirectPHP.php(58) : eval()'d code on line 118

Ok the question should be changed to php nesting in php. I need a way to negate the offect of the php nesting like it's possible for quotes with \"

Answer 1

Updated

You made PHP tags within echo. That's pretty wrong!

As I understand OP:

$text = htmlentities('<?php echo \'<pre><p align="center"><iframe src="aufgaben/"+cookieValue+"/"+cookieValue+".html" width="322" height="497" frameborder="0"></iframe></p></pre>\'; ?>');
echo "<script type='text/javascript'>
iframe0document.getElementById('jform_articletext').value = ".$text.";
</script>";

You need htmlentities function to encode characters to their html equivalents and print out php tags az plain text.

Answer 2

But you are already in "php mode"! Why you reopen php tag on

'<?php echo

? Then, what is "iframe0document.getElementById"?