Проверка типа символов

;\r\n$isInList = strpos($symbolList, $c2) !== false;\r\n//isInList is true\r\n\r\necho \"isLetter is \", var_dump($isLetter);\r\necho \"isNumber is \", var_dump($isNumber);\r\necho \"isInList is \", var_dump($isInList);"}

;
$isInList = strpos($symbolList, $c2) !== false;
//isInList is true

echo "isLetter is ", var_dump($isLetter);
echo "isNumber is ", var_dump($isNumber);
echo "isInList is ", var_dump($isInList);