- array_map: documentation ( source)
- print_r: documentation ( source)
- mb_strtoupper: documentation ( source)
<?php
class A {
/** @return string[] */
public function test() {return array_map(array($this, 'callback'), array('ааа', 'ббб', 'ввв'));}
/**
* @param string $value
* @return string
*/
private function callback($value) {return mb_strtoupper($value);}
}
$a = new A();
echo print_r($a->test(), true);