note 87802 rejected from language.variables.variable by thiago

Note Submitter: milin_mestry at yahoo dot com ---- error_reporting(E_ALL); $iNum = 123; //a variable with the value of 123 $$iNum = '456'; // $123 is your variable name, this would normally be invalid. echo '$$iNum value is ',$$iNum; The output is: $$iNum value is 456 Variables must be named using only letters (a-z, A-Z), numbers and the underscore character; their names must start with either a letter or an underscore, and are one of only two identifier types in PHP that are case-sensitive. As per PHP "$123" is an invalid variable, then how the value of "$$iNum" is printed on the browser without any error? is this a bug in PHP? Note: Tested on "PHP Version 5.2.4-2ubuntu5.4, Apache 2.0 Handler "