The extension of the legitimacy of fulfillment in PHP5

The extension of validation legitimacy in PHP5
In PHP5.2, you can verify the legitimacy by using the built-in extension filter, as in the following example:

1 Verify if Email:
email = "jason@example.com";
if (Filter_var ($email, Filter_validate_email))
{
echo "Valid email address!"; }
Else
{
echo "Invalid email address!";

}


2 Verifying whether an integer
if (Filter_var ($age), Filter_validate_int, Array (' options ' = = Array (' min_range ' = +, ' max_range ' = 100)))
{
echo "Valid age!";
}
Else
{
echo "Invalid age!";
}


3 followed regular expressions
if (Filter_var ($age), Filter_validate_int, Array (' options ' = = Array (' min_range ' = +, ' max_range ' = 100)))
{
echo "Valid age!";
}
Else
{
echo "Invalid age!";

}

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