Ivlev
[hljs class="php"]<?$test = array('catalog_1' => '500', 'catalog_2' => '1000', 'catalog_3' => '2000');switch(filter_input(INPUT_GET, 'akt')) { case 'catalog_1': echo $test[filter_input(INPUT_GET, 'akt')]; break; case 'catalog_2': echo $test[filter_input(INPUT_GET, 'akt')]; break; case 'catalog_3': echo $test[filter_input(INPUT_GET, 'akt')]; break; }?><a href="?akt=catalog_1">Test 1</a><a href="?akt=catalog_2">Test 2</a><a href="?akt=catalog_3">Test 3</a>[/hljs 
Сталин 
<?PHP
switch ($_GET['a'])
{
$test = [500,1000,2000];
case 'test_0':
echo $test[0];
break;
case 'test_1':
echo $test[1];
break;
case 'test_2':
echo $test[2];
break;
}
?>
crew_