In what ways can PHP developers optimize their code to accurately compare strings with special characters, such as in the scenario described with the "Zubehör" value?

When comparing strings with special characters in PHP, developers should normalize the strings using the `Normalizer` class and then compare them using a case-insensitive comparison function like `strcasecmp()` to ensure accurate results. This will help handle special characters like umlauts in a consistent manner during string comparison. 

$string1 = "Zubehör";
$string2 = "zubehör";

$normalizedString1 = Normalizer::normalize($string1, Normalizer::FORM_C);
$normalizedString2 = Normalizer::normalize($string2, Normalizer::FORM_C);

if (strcasecmp($normalizedString1, $normalizedString2) === 0) {
    echo "The strings are equal.";
} else {
    echo "The strings are not equal.";
}

Keywords

PHP string comparison special characters mb_strtolower utf8_encode

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