note 125142 deleted from userlandnaming.rules by cmb

Note Submitter: Anonymous ---- #### Rules for PHP identifiers 1. A variable starts with the $ sign, followed by the name of the variable. 2. A variable name must start with a letter or the underscore character. 3. A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ ). 4. Identifiers are case sensitive. Therefore, a variable named $unicorn is different from a variable named $Unicorn, $uNicOrn, or $unicorN. 5. Identifiers can be any length. 6. An identifier name can’t be identical to any of PHP’s predefined keywords.