What is the best practice for comparing usernames with case sensitivity in PHP?

When comparing usernames in PHP, it is important to consider case sensitivity. To ensure accurate comparisons, you can use the `strcasecmp()` function, which compares two strings in a case-insensitive manner. This function will return 0 if the strings are equal, regardless of case. 

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

if (strcasecmp($username1, $username2) === 0) {
    echo "Usernames match!";
} else {
    echo "Usernames do not match!";
}

Keywords

case sensitivity usernames comparison PHP string manipulation

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