convert to number/convert to string.

[Anon]

hi,
1.) how to check that the user input are all numbers and then convert the input into number and then assign the first two numbers to a variable??
eg the user enter "123456",then "12" should be assign to $num.

and also
2.) how can i convert number to string???

thanks for the help, 🙂

[Anon]

In general, you don't need to convert numbers to strings or vice
versa. PHP is usually able to figure out what is needed from the
context.

To see if a variable is numeric, you can use is_int() or one of the
similar functions; but you might prefer a regular expression as this
allows you to specify the exact number of digits you wish to allow,
e.g.:

  if (ereg('^{[0-9]{1,5}$',} $var))

will ensure that $var contains 1 to 5 digits and nothing else.