How can IDEs understand and provide code completion for specific types in PHP classes?

IDEs can understand and provide code completion for specific types in PHP classes by utilizing type hinting in method parameters and return types. By specifying the data type of parameters and return values in method signatures, IDEs can infer the type of variables and provide accurate code completion suggestions. Additionally, documenting classes and methods with PHPDoc annotations can further enhance the IDE's ability to provide intelligent code completion. 

class MyClass {
    /**
     * @param string $name
     * @return int
     */
    public function calculateLength(string $name): int {
        return strlen($name);
    }
}

$myObject = new MyClass();
$length = $myObject->calculateLength("Hello"); // IDE will provide code completion for $length as an integer

Keywords

IDEs code completion PHP classes type hinting static analysis

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