需要特殊字符，数字，大写和小写字母的文本验证

Question

I am having trouble with a text validation function. I need it to make sure a password has at least 1 number, one lowercase letter, one uppercase letter, no spaces, and one character that isn't a number or letter. My code so far:

function validatePassword($Password)
{
    if (preg_match("/[!-/0-9A-Za-z]/", $Password)==1)
    {
        return TRUE;
    }
    else
    {
        return FALSE;
    }
}

right now, it displays everything as invalid. I am also recieving the error:

"Warning: preg_match(): Unknown modifier '0' in /jail/home/ds0005/html/project1/p1s5.php on line 32"

If it helps, the rest of my code is listed below:

<?php
    error_reporting(E_ALL);
    ini_set('display_errors', 'On');

    $Passwords = array(
    'Pas$word1',
    'Pas$word2',
    'Pas$word3',
    'Pas$word4',
    'pas$word1',
    'PAS$WORD1',
    'Password1',
    'Pas$word',
    'Pas$word 1',
    'Pas$word1234567890',
    'P$wd1');

    function validatePassword($Password)
    {
        if (preg_match("/[!-/0-9A-Za-z]/", $Password)==1)
        {
            return TRUE;
        }
        else
        {
            return FALSE;
        }
    }

    foreach ($Passwords as $Password)
    {
        if (validatePassword($Password) == false)
        {
            echo "<p>The password <em>$Password</em> does not appear to be valid.</p>";
        }
    }
    echo "<p>Processing has completed.</p>";
?>

Any help would be greatly appreciated

Answer 1

Try this:

if (preg_match("/^(?=.*\d)(?=.*[A-Z])(?=.*[a-z])[0-9A-Za-z!-\/]{1,}$/", $Password)==1)

See here for more info: https://stackoverflow.com/a/11874336/1512654