php关键字，

php关键字，

and	or	xor	__FILE__	exception (PHP 5)
__LINE__	array()	as	break	case
class	const	continue	declare	default
die()	do	echo	else	elseif
empty()	enddeclare	endfor	endforeach	endif
endswitch	endwhile	eval()	exit()	extends
for	foreach	function	global	if
include	include_once	isset()	list()	new
print	require	require_once	return	static
switch	unset()	use	var	while
__FUNCTION__	__CLASS__	__METHOD__	final (PHP 5)	php_user_filter (PHP 5)
interface (PHP 5)	implements (PHP 5)	extends	public (PHP 5)	private (PHP 5)
protected (PHP 5)	abstract (PHP 5)	clone (PHP 5)	try (PHP 5)	catch (PHP 5)
throw (PHP 5)	cfunction (PHP 4 only)	this (PHP 5 only)