How to check if a string can be used as a variable name in PHP?

Question

In PHP one can use variable variables...

For example...

class obj { }
$fieldName = \"Surname\";
$object = new obj();
$object->Name = \"John\";
$objec         


        

Answer 1

I think regex is the way to go, and as far as I can remember the restrictions are:

• alphanumeric
• must start with a letter
• can contain an underscore

so the regex would be "/[a-zA-Z]+[0-9a-zA-Z_]*/" - off the top of my head so your milage may vary.