Syntax error in PHP script

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PHP

the syntax error at the line after the third $Content variable.

unexpected \ (T_NS_Seperator), expecting identifier (T_String)

What I have tried:

if($ran != 0):
		$CTcontent = "<?php\
\\r\
\\r";
		$CTcontent .= '// Set $lastrun = "never" to stop fakecon from running completely'."\
\\r\
\\r";
		$CTcontent .='$lastrun = "'.date("Y-m-d")."\\";\
\\r\
\\r?>";
		if (is_writable($crontab)):
			$handle = fopen($crontab, "w");
			if (fwrite($handle, $CTcontent) === FALSE):
						// echo only while testing
						//echo  'Fake Cron error! Could not write to '.$crontab.".\
";
						//exit;
					endif;
					fclose($handle);
				endif;					
			endif;			
		endif;
	endif; 
endif;