PHP魔法函數：__call()

<?php
class MethodTest {
     public function __call($name, $arguments) {
        // Note: value of $name is case sensitive.
        echo "Calling object method '$name' "
             . implode(', ', $arguments). "\n";
     }
}
$obj = new MethodTest;
$obj->runTest('in object context');

運行結果：
Calling object method 'runTest' in object context