Question: What is method chaining in PHP?

Answer: Method chaining is a technique where multiple methods can be called on the same object in a single line. It improves code readability and conciseness.

Example:

class Calculator { 
private $result; 
public function add($a, $b) { 
$this->result = $a + $b; 
return $this; 
} 
public function multiply($a) { 
$this->result *= $a; 
return $this; 
} 
} 
$total = (new Calculator())->add(3, 5)->multiply(2)->getResult();

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