在
http://us2.php.net/manual/en/language.oop5.properties.php的以下代码中<<<<<<<象征意味着？
<?PHP
class SimpleClass
{
// invalid property declarations:
public $var1 = 'hello ' . 'world';
public $var2 = <<<EOD
hello world
EOD;
public $var3 = 1+2;
public $var4 = self::myStaticmethod();
public $var5 = $myVar;
// valid property declarations:
public $var6 = myConstant;
public $var7 = array(true,false);
// This is allowed only in PHP 5.3.0 and later.
public $var8 = <<<'EOD'
hello world
EOD;
}
?>
它被称为
Heredoc syntax,可用于分配字符串值.