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PHP __get weirdness

View chains.php
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<?php
// You can do some very odd things with PHP's __get method
class Chain {
private $chain = array();
public static function it() {
return new self;
}
public function __get($property) {
$this->chain[] = $property;
return $this;
}
public function __toString() {
return join(" ", $this->chain);
}
}
echo Chain::it()->Building->up->a->chain->oh->yeah;
// prints "Building up a chain oh yeah"
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