No. validation using regular expression

[Anon]

I need a code in PHP for check if a string is number using regular expression not using function is_number().

[[deleted]]

What's wrong with is_number()? :-)

and to do it with regexps you first need to define what you consider to be 'a number'.

[Anon]

I have a form where users fill the field named age (age pers.). I want to check if this string is number by 3 char.

[[deleted]]

if (preg_match('/[0-9]{3}/',$variable))
{
echo 'yes';
}
else
{
echo 'no';
};

or

if (is_numeric($variable) && ($variable>0) && (variable<150))
{
echo 'yes';
};

[Anon]

That should be preg_match('/^{[0-9]{3}$/',$variable)}

[[deleted]]

Indeed it should, thanks programmerman.