Php what does <<< mean ?

Posted by Doodle on Stack Overflow See other posts from Stack Overflow or by Doodle
Published on 2010-05-06T10:00:26Z Indexed on 2010/05/06 10:08 UTC
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In the following code from http://us2.php.net/manual/en/language.oop5.properties.php what does the <<< symbol mean?

<?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;
}
?>

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