[RESOLVED] How can I find a string is a Numeric or varchar

[int2inc]

I have to update my data file and wants to delete the rows which are not have a numeric Value in a particular field or column. So how can I find the string is numeric.
Thanks in inticipation to all

[bpat1434]

[man]is_numeric/man Number or numeric string
and
[man]is_string/man String in general

Those two tests both return TRUE or FALSE depending on if the variable is a string, or is a number (or numeric string).

Alternatively, you could say:

if(eregi("^[^0-9]*$", $string_to_be_searched))
{
  // We have anything but an all numeric string
}
else
{
  // We can assume we have a numeric string
}