Resolved if then help

[owt200x]

This may seem stupid, but I can only do basic if then statements.

What I dont know how to code is if variable has data then another variable equals something.

Im using variables in a config.php, and i need code to determine if a variable has any data, then makes a new variable have data, but if teh first variable is empty, then the new variable in empty.

Please help me, OwT

[masterofollies]

if ($a == "1")
{
//Do code
}

elseif ($a == "2")
{
//Do code
}

elseif ($a == "3")
{
//Do code
}

else {
//Do code
}

You can have as many elseif's as you want. But only 1 IF and 1 ELSE for a certain variable.

[owt200x]

that would work, but i need it to determine if the variable has a value at all. then do code. I wont know what the variables value will be, so i wouldnt be able to get it to work with that

[_Aerospace_Eng_]

Where are the values coming from? Provide us with more information. Your post was pretty vague to begin with.

[masterofollies]

and i need code to determine if a variable has any data, then makes a new variable have data, but if teh first variable is empty, then the new variable in empty.

Check if variable has any value.

echo "$value";

if variable is empty

if ($value == "")
{
//Its empty
}
else {
//Its not empty
}

Or you could do this. To change a variable if its empty into one with data.

if ($value == "")
{
$value = 1;
}

[oesxyl]

Originally Posted by owt200x

that would work, but i need it to determine if the variable has a value at all. then do code. I wont know what the variables value will be, so i wouldnt be able to get it to work with that

the variable exists?

PHP Code:

if(isset($namevar)){
  print "is true => exists";
}else{
  print "is false => not exists";
} 


is variable empty?

PHP Code:

if(empty($namevar)){
  print "yes";
else
  print "no"; 


is variable not empty? (negate something using ! operator)

PHP Code:

if(!empty($namevar)){
  print "no"; // because not true => false
else
  print "yes"; 


variable exists and is not empty?

PHP Code:

if(isset($namevar) && !empty($namevar)){
  print "yes";
}else{
  print "no";
} 


the best way to learn something is the manual:
language reference
control structure, if, for, ...
operators, empty, isset, !, &&, ||, and, or, not,....
when you are stuck with something ask, always is somebody who help you to make things clear,

best regards

[masterofollies]

Whats great about PHP is there is a dozen ways of writing the same piece of code using different methods.

[owt200x]

Originally Posted by oesxyl

PHP Code:

if(empty($namevar)){
  print "yes";
else
  print "no"; 


I appologize my question wasn't very clear, i didn't exactly know how to put what i needed, but this is what i needed. thank you all for helping.

btw, the variables would be included from another php file, for config settings in the main script.