[SOLVED] Using if, elseif, and else in CodeIgniter causes a white page

Using if, elseif, and else in CodeIgniter causes a white page

Please check my script.

if ($namachief != NULL)
{
    echo $namachief;
}
else if ($namarm != NULL)
{
    echo $namarm;
}
else
{
    echo "Something wrong. Please contact US";
}

My condition isn't working when in this condition => $namarm != NULL; I only get white page but it's normal when in this condition => $namachief != NULL.

It's fine when I do this: echo $namachief; & echo $namarm;

if () {

}
else if (){
}
else if(){
------------------------ My Script Here -----------------------------
}

Both answer below are right.

My problem lies here. In my form I did this:

<option value="none">None</option>

Then I change it to:

<option value="">None</option>

Solution

Write your condition as below:-

if(isset($namachief)  &&  !empty($namachief)){
    echo $namachief;
}
else if (isset($namarm)  &&  !empty($namarm)){
    echo $namarm;
}
else{
    echo "Something wrong. Please contact US";
}

If you want to print both variables if both are set and have valid values then,

if(empty($namarm)  &&  empty($namachief)){
    echo "Something wrong. Please contact US";
}
else if (!empty($namachief)  &&  !empty($namarm)){
    echo $namarm;
    echo $namachief;
}
else if (isset($namarm)  &&  !empty($namarm)){
    echo $namarm;
}
else if(isset($namachief)  &&  !empty($namachief)){
     echo $namachief;
}
else{
  // else stuff
}