Replacing variable in function

[dotkpay]

Hello,

 

I have been trying to replace a variable's value inside a function in case it matches a certain criteria but I can't seem to get it right.

 

Let me give an example:

 

<?php

function replace_value($obj)
{
if($obj==1)
{
$obj=2;
}
}

$number = 1;
replace_value($number);

echo $number;

 

So how do I go about making $number = 2, because it still has a value of 1 even after I pas it through the function replace_value.

[Nasir]

The function's value it returns must be stored in a variable if you want to utilize it through the rest of your code. Otherwise you'll end up just calling the function and it won't serve any purpose since your not really storing the function's returned value anywhere.

 

What you probably want is:

 

<?php

function replace_value($obj)
{
if($obj==1)
{
$obj=2;
}

return $obj;
}

$number = 1;
$number = replace_value($number);

echo $number;

[Proletarian]

Or you can pass the variable by reference so changes to the variable actually occur.

 

<?php

function replace_value(&$obj) // note the addition of the & before the variable, indicating it is not being passed by reference
{
if($obj==1)
{
$obj=2;
}
}

$number = 1;
replace_value($number);

echo $number;
?>