I've tried a function like this:
function validate() { //
if ( is_numeric($input1) && is_numeric($input2) && ctype_alpha($input3) &&
ctype_alpha($input4) )
 return true;

And then I call the function:

if (validate() == false) {
    some action;

My problem is I get the action every time, even though the input is of the
right type. And, is ctype_alpha() the only way to check for only alphabetic
And (this started with one question), anyone got a good solution on
validating email-adresses with php?

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