Validating integer datatype with regularexpressionvalidator
Thus DO NOT USE that function to validate user input that will be used as id number for in a query for example, this could cause mysql errors. I think the function below is a robust test for integers working on all datatypes.
The client side validation routine should be written in a scripting language, such as Java Script or VBScript, which the browser can understand.The following two mutually inclusive properties list out the error message: Complex pages have different groups of information provided in different panels.In such situation, a need might arise for performing validation separately for separate group.Will return false on 0.1515, '415.4134' and '-616'.Be aware though, before PHP 5.1.0 this will return true on an empty string.This kind of situation is handled using validation groups.
To create a validation group, you should put the input controls and the validation controls into the same logical group by setting their Validation Group property.
The easiest way of doing so is adding a zero before your var, just like: To check if a string ($s) is a representation of an integer (including representations is scientific notation and negative numbers), you can use the following test, provided that you don't expect values that are out of bounds for an integer.is_numeric($s) && floatval($s) == intval(floatval($s))If the test returns true, the string is a representation of an integer.is_numeric (if it works as intended) protects from strings that are not proper numbers.
The comparison filters anything that is non_integer If, for performance reasons, you want to avoid converting to float twice, it can also be written:is_numeric($s) && ($f = floatval($s)) == intval($f)If you plan to get values that cannot be representated with an integer and are ready to deal with a float, you can use floor instead of intval, as long as you are ready to deal with floats.
I ran into the problem in a My SQL app where I would either SELECT an INT PRIMARY KEY or INSERT a new record and use mysql_insert_id() to get the KEY before continuing onto the new section.
I used is_int() to make sure the subsequent queries wouldn't break when using the key variable.
The validation control classes are inherited from the Base Validator class hence they inherit its properties and methods.