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<?php class ColorChanger { public $lastColor; public function blackMethod() { echo "blackMethod(); Last color: {$this->lastColor}\n"; $this->lastColor = 'black'; return $this; } public function whiteMethod() { echo "whiteMethod(); Last color: {$this->lastColor}\n"; $this->lastColor = 'white'; return $this; } public function colourMethod() { echo "colourMethod(): {$this->lastColor}\n"; $this->lastColor = null; } } $c = new ColorChanger(); $c->blackMethod()->colourMethod(); $c->whiteMethod()->colourMethod(); $c->blackMethod()->whiteMethod()->colourMethod();
Output for git.master_jit, git.master, rfc.property-hooks
blackMethod(); Last color: colourMethod(): black whiteMethod(); Last color: colourMethod(): white blackMethod(); Last color: whiteMethod(); Last color: black colourMethod(): white

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