php - Check if number is decimal -

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i need check in php if user entered decimal number (us way, decimal point: x.xxx)

any reliable way this?

you can of want is_float, if really need know whether has decimal in it, function above isn't terribly far (albeit wrong language):

function is_decimal( $val ) {     return is_numeric( $val ) && floor( $val ) != $val; }

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