Variable-variables.. no error???

Question

in below program... i am using integer content as variable-variables... but as we know... variable name must not starts with number than how program not showing any error??!!... please explain

<?php
$x=10;
$x=20;//$x=$10
echo('value of the $x is : '.$x);
?>

Answer 1

I think that's because the variable's variable use variable name only as a reference to first variable name. Not the value it self.

We can do some test as follow. According to above test you will get $x = 20.

But if we try to access $10, it will give you the error you expect. We can assume that PHP uses only a reference to the first variable. Not the value it self.

For the record, this is only my personal idea. May be I am wrong. I faced the same situation but I couldn't find enough info on the matter.

Answer 2

thanks for help bro....
I thought so... it just taking names but not the value....