is there a php function that I can verify if the string contains all digital number, not alphabetic charactor? thanks.
michael123 0 Junior Poster in Training
chrisbliss18 26 Posting Shark
Use Regular Expressions. Once you learn how to use those, you can learn how to do matching for any pattern.
bwest 15 Junior Poster in Training
While I would agree with the regular expressions. It is the best and proper way. Regular expressions can be hard to make.
An alternative would be to have an array like this
$my_nums = array("0","1","2")
and then loop through the length of the string and do a check like this
if (in_array($your_string, $my_nums))
-Brad
sarahk 0 Junior Poster
smac 0 Newbie Poster
If you're willing to allow scientific notation etc.., how about using is_numeric():
From the manual: http://us3.php.net/is_numeric
bool is_numeric ( mixed var )
Finds whether the given variable is numeric. Numeric strings consist of optional sign, any number of digits, optional decimal part and optional exponential part. Thus +0123.45e6 is a valid numeric value. Hexadecimal notation (0xFF) is allowed too but only without sign, decimal and exponential part.
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