在http://us2.php.net/manual/en/language.oop5.properties.php的以下代码中<<<<符号是什么意思?
<?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;
}
?>
答案 0 :(得分:5)
它被称为Heredoc syntax,可用于分配字符串值。
答案 1 :(得分:4)
Heredoc syntax中的字符串。
答案 2 :(得分:3)
这是另一种定义String的方法(Newdoc / Heredoc语法) - Manual - String