What are some common pitfalls when comparing encrypted strings in PHP?

One common pitfall when comparing encrypted strings in PHP is that using the "==" or "===" operators may not work as expected due to the encryption process resulting in different encoded strings even if the original content is the same. To properly compare encrypted strings, you should use a secure method like hash_equals() which compares two strings in a timing attack safe manner. 

$encryptedString1 = encryptData($data1);
$encryptedString2 = encryptData($data2);

if (hash_equals($encryptedString1, $encryptedString2)) {
    // Strings are equal
    echo "Strings are equal";
} else {
    // Strings are not equal
    echo "Strings are not equal";
}

Keywords

encryption strings comparison PHP security

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