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Определить числа и знаки


banyman
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Подскажете как более точно определить, ввел пользователь запятую или точку... нужна в числе только точка или ее отсутствие (например, 0.9 или 9 или 88). На запятую error.

$sumznak = !eregi("^[0-9]+([\.]+[0-9])", $sum);

Так у меня проверка проходит, если ввели запятую, но и если ввести одно число (например, 4) - тоже ошибка. Ввожу 44 - все гуд.

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