What potential issues can arise when comparing usernames in PHP without considering case sensitivity?

When comparing usernames in PHP without considering case sensitivity, potential issues can arise where usernames that differ only in case are treated as distinct, leading to confusion and inconsistencies in user identification. To solve this issue, you can convert both usernames to a consistent case (e.g., lowercase) before comparing them. 

$username1 = "JohnDoe";
$username2 = "johndoe";

if (strtolower($username1) === strtolower($username2)) {
    echo "Usernames match!";
} else {
    echo "Usernames do not match.";
}

Keywords

case sensitivity string comparison strtolower strtoupper strcmp

Related Questions