How can the use of if statements in PHP be optimized for comparing usernames with case sensitivity?

When comparing usernames with case sensitivity in PHP, it's best to use the strcasecmp() function instead of directly comparing strings with if statements. strcasecmp() compares two strings in a case-insensitive manner, making it ideal for comparing usernames regardless of their case. 

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

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

Keywords

if statements PHP case sensitivity strcmp function strcasecmp function

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