(basic) combining strings

[chard]

Here's the format:

 

$var1 = ""

$var2 = "123"

$var3 = "456"

 

$var1 = $var1 + var2;

 

Now that works fine.

 

But when I do that again somewhere else

$var1 = $var1 + $var3;

 

The numbers inside the $var1 get scrambled and don't end up in 123456.

What am I doing wrong?

 

[Aeglos]

$var1 = $var2 . $var3;

 

That will give you $var1 = 123456.

 

The point operator ( . ) joins two variables, the plus operator simply arithmeticaly adds them, as in: $var1 = 123+456 = 579

[marcus]

$var = 123;
$var .= 456;

echo $var;