default function argument with $_GET

[mds1256]

Hello

 

After some advice I have the following code but need to get the function to have a default value if a GET variable is not set.

 

So if i use

 

error();

 

i get the default function value which is fine and is what i want but when i add an argument of GET and the GET is not set then it doesnt work and displays blank.

 

<?php

function error($errorID=0)
{
echo $errorID;

}


error($_GET['errorID']);


?>

 

 

[trq]

Use isset to check the variable exists prior to passing it to your function.

[mds1256]

kind of but when the errorID is null or blank it doesnt give any value from the function.

 

I was also hoping to all the checking inside the function instead of on the page where i am going to use this function

 

 

 

<?php




function error($errorID=0)
{
echo $errorID;

}


if(isset($_GET['errorID']))
{
error($_GET['errorID']);
}
else
{
error();
}


?>

[mds1256]

bump, any one?

[EdwinPaul]

If you pass a 'nothing' to your function, the function will echo 'nothing'...

Check for yourself:

change

echo $errorID;

to:

echo '>>>'.$errorID.'<<<';

and you will see the result.

[mds1256]

Thats fine but i want it to default to its default value is nothing is passed in not just display nothing

[trq]

function error($errorID=null)
{
  echo !empty($errorID) ? $errorID : 'somedefault';
}

[mds1256]

function error($errorID=null)
{
  echo !empty($errorID) ? $errorID : 'somedefault';
}

 

You are a legend!!!!! 

 

excatly what i was after!

 

THANKS!

[trq]

And it only took like 3 days? You should take a look at the manual in relation to control structures. A simple 'if' statement would have fixed this in 5 minutes.

 

http://php.net/manual/en/control-structures.if.php

[mds1256]

And it only took like 3 days? You should take a look at the manual in relation to control structures. A simple 'if' statement would have fixed this in 5 minutes.

 

http://php.net/manual/en/control-structures.if.php

 

not done much with ternary operators, but they are quite useful i have learnt