Help with a function..

[jscix]

How could I make this function return a true or false value depending on if the supplied string passes the checks??

 

<?php

Function ValidateString($txtcheck)
{  //start function

if ($txtcheck == (null))
{
// didn't pass because string is null
}

elseif (strlen($txtcheck) < 3)
{
// didn't pass because string is too short

}

elseif (ctype_alnum(!$txtcheck))
{
// didnt pass because string contains alphanumeric chars
}
else
{
// return true
}

} // end function

 

sorry for the easy question, still getting the hang of this stuff. anyone?

[zq29]

Like so...

<?php
function ValidateString($txtcheck) {
    if($txtcheck == (null)) {
        return false;
    } elseif(strlen($txtcheck) < 3) {
        return false;
    } elseif(ctype_alnum(!$txtcheck)) {
        return false;
    } else {
        return true;
    }
}
?>

[jscix]

ok a bit embarressed, didn't think it'd be that easy ;;o

 

thanks alot though!

[Psycho]

Kind of "wordy" though. how about just:

 

function ValidateString($txtcheck) {

    if( $txtcheck == (null) || strlen($txtcheck) < 3 || ctype_alnum(!$txtcheck) ) {

        return false;

    } else {

        return true;

    }

}

 

[zq29]

No problem, always worth just typing it into your editor and testing it, you never know, it might just be that easy!

[Psycho]

Ok, I'm a minimalist and on second thought I realized you could compress this down to a single line:

 

function ValidateString($txtcheck) {
    return ( !( $txtcheck == (null) || strlen($txtcheck) < 3 || ctype_alnum(!$txtcheck) ) );
}

[zq29]

Ok, I'm a minimalist and on second thought I realized you could compress this down to a single line:

 

Well done, though, I intentionally re-wrote the function to clearly display the logic, as the original poster appears to be new to the language

[Psycho]

Well done, though, I intentionally re-wrote the function to clearly display the logic, as the original poster appears to be new to the language

 

Agreed. Which is why I would not have proposed the last bit of code as an initial solution.