whats ->

[jain747]

I'm trying to understand code about heredoc notation from the PHP manual, but I can't figure out what -> means in $this->foo = 'Foo'; I dont think the previous chapters have discussed the usage of ->. Thanks for the help.


<?php
$str = <<<EOD
Example of string
spanning multiple lines
using heredoc syntax.
EOD;

/* More complex example, with variables. */
class foo
{
var $foo;
var $bar;

function foo()
{
$this->foo = 'Foo';
$this->bar = array('Bar1', 'Bar2', 'Bar3');
}
}

$foo = new foo();
$name = 'MyName';

echo <<<EOT
My name is &quot;$name&quot;. I am printing some $foo->foo.
Now, I am printing some {$foo->bar[1]}.
This should print a capital 'A': \x41
EOT;
?>

 

[skiflyer]

Your accessing the member of a class.

You see the 
var $foo;

above?  

so 
$this->foo = 'Foo';

means your modifying that private member.

New instances of a class foo will each have their own copy of $foo inside them.  Using this->foo is what tells it that it's modifying it's own copy, rather than some global variable outside the class.

That is far from the best explanation, but my OO skills are weak.  G'luck.

-Rob

 

[sleipnir214]

For further reading on PHP's object-oriented features, point your web-browser here:

http://www.php.net/manual/en/language.oop.php

Be aware, too, that some of PHP's OO behavior will change in version 5.

Want the best answers? Ask the best questions:

http://www.catb.org/~esr/faqs/smart-questions.html

TANSTAAFL!