string add question, very easy for you

[phpnew000]

$a0="abcd";

now i want add "efg" to $a0 so $a0 is "abcdefg";

none of following works

1. $a0+="efg"; //similar to java
2. $a0=$a0+"efg";
3. $a0="$a0"+"efg";
4. $a0="$a0+efg";

following works
$a0="$a0 efg";
but result has a space after "abcd" as "abcd efg";

hi! do you know to do it?

thanks

[zhabala]

$a0=$a0."efg"; 

or

$a0.="efg"; 

[phpnew000]

yes,
i just got answer from google, same as yours.
cheers