php conditional


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php conditional
by Neil Bradley on Oct 13, 2008 at 10:43:23 pm

Working on a form containing conditional rejoins in php.
I am using is_numeric to test if the form contains a number value however not sure what to use to the is the value contains characters.

Any help appreciated.

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Re: php conditional
by Abraham Chaffin on Oct 14, 2008 at 9:11:27 pm

You could do something like


if($input==preg_replace('|[^a-zA-Z]|','',$input)){

      true;

}else{

      false;

}

Abraham

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Re: php conditional
by Neil Bradley on Oct 14, 2008 at 9:32:57 pm

The code I am using for a similar form processing only numbers is:

if (!(is_numeric($_POST['mobile']))
header("Location: register.php?error=notnumeric");
exit;
}

This code figures out that there are no numbers being sent via the form and returns a message back to the form saying "display my hidden message".
I see how your code works but unsue how to insert it into my own code. How would I adapt your code here:

if($input==preg_replace('|[^a-zA-Z]|','',$input)){
true;
}else{
false;
}

...to work with my intetion of checking for characters raher than numbers?

Cheers,
Neil

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Re: php conditional
by Abraham Chaffin on Oct 14, 2008 at 9:44:49 pm

The code below would check if the mobile post value is only a-z or A-Z. Then redirect it to your error page.


$input=$_POST[mobile];



if($input==preg_replace('|[^a-zA-Z]|','',$input)){ 

     header("Location: register.php?error=not-alphabetic-only"); 

     exit; 

}

Abraham

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Re: php conditional
by Neil Bradley on Oct 14, 2008 at 9:56:42 pm

Nice
I see how this works:
$input=$_POST[mobile];

if($input==preg_replace('|[^a-zA-Z]|','',$input)){
header("Location: register.php?error=not-alphabetic-only");
exit;
}

Just for fun this time if I wanted to check to see if the form contained any characters or any numbers (basically an entry of any number or character combination) how would this affect the code configuration?

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Re: php conditional
by Abraham Chaffin on Oct 14, 2008 at 11:21:49 pm

In this example you could edit the regular expression and add 0-9 as another qualifier. "|[^a-zA-Z0-9]|"


$input=$_POST[mobile];



if($input==preg_replace('|[^a-zA-Z0-9]|','',$input)){ 

     header("Location: register.php?error=not-alphabetic-only"); 

     exit; 

}

Abraham

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