Noob's doubt on echo function in php

[mandi]

I have just started to learn some php via internet,
I just went through the very basics of php,
I studied some echo functions inside the php,while i tried to practice them
I got strucked,this is the code i tried

Code:

<?=php
echo "why is this","echo script","not working!!";
?>

and i got this error

Code:

Parse error: syntax error, unexpected T_ECHO, expecting ',' or ';' in C:\xampp\xamp\echo11.php on line 2

I am just a noob to php,so just bear with me ,

and try to help me to solve this error....