Simple regex question

[Code Monkey]

Originally Posted by filburt1

PHP Code:

if (preg_match("/^[0-9\w]+$/siU", $subject))
{
    // valid
} 


or

PHP Code:

function validate($subject)
{
    for ($i = 0; $i < strlen($subject); $i++)
    {
        if (!is_numeric($subject{$i}) or $subject{$i} != " ")
        {
            return false;
        }
    }
    return true;
} 


Not working for me.

The c wrapper ctype_digit() is much faster than is_numeric if your going to go that way about it.

^0-9\s //Anything that does not "^" have the value of a digit "0-9" or a space "\s".
^\d\s works also and might be a bit faster

Run this test on your server Lionel. It works for every combo I have tried.

PHP Code:

$test = array(
    '55 32',
    '123b4',
    '4-55',
    '9543',
    '*/12-b',
    '&f54gt',
    '[1234]',
    '12 3',
    'end'
);

for($i = 0; $i < 9; $i++)
{
    echo digitsOnly($test[$i]) . '<br />';
}



function digitsOnly($target)
{
    if(preg_match('#[^\d\s]#', $target))
    {
        return 'Ahah! Found an evil character in <b>' . $target . '</b>';
    }
    else
    {
        return 'Only Digits and Spaces here! in <b>' . $target . '</b>';
    }
}