preg_match: nothing to repeat / no match

Question

I am using this: if(!preg_match(\'/^+[0-9]$/\', \'+1234567\'))

and am getting:

Warning: preg_match() [function.preg-match]:

Answer 1

'/^\+[0-9]$/' means that begining of the line has to be plus sign folowed by a number then end of line.

'/^\+[0-9]+$/' means that begining of the line has to be plus sign folowed by a one or more numbers then end of line.