<?php

namespace test;

class SomeName
{
    public static function SomeName()
    {
        echo "something\n";
    }
}

$a = new SomeName();
$a->SomeName();
/* печатает something */

<?php

// namespace test;

class SomeName
{
    public static function SomeName()
    {
        echo "something\n";
    }
}

$a = new SomeName();
$a->SomeName();
/* PHP Fatal error: Constructor SomeName::SomeName() cannot be static in /tmp/test.php on line 11 */