Question

I need to create a var like $myvar-test; but thats not valid or?

Answer 1

No, it’s not valid. The reason is the minus sign (-). In PHP, variables can contain 0-9a-zA-Z_ with the exception that it must not begin with a number and Unicode letters are allowed. See: http://www.php.net/manual/en/language.variables.basics.php

Variables in PHP are represented by a
dollar sign followed by the name of
the variable. The variable name is
case-sensitive.

Variable names follow the same rules as other labels in PHP. A valid

variable name starts with a letter or
underscore, followed by any number of
letters, numbers, or underscores. As a
regular expression, it would be
expressed thus:
‘[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*’

And a couple of examples:

<?php
$var = 'Bob';
$Var = 'Joe';
echo "$var, $Var";      // outputs "Bob, Joe"

$4site = 'not yet';     // invalid; starts with a number
$_4site = 'not yet';    // valid; starts with an underscore
$täyte = 'mansikka';    // valid; 'ä' is (Extended) ASCII 228.
?>