(PECL rar >= 2.0.0)
RarEntry::isEncrypted — Test whether an entry is encrypted
public RarEntry::isEncrypted ( ) : bool
Tests whether the current entry contents are encrypted.
Note:
The password used may differ between files inside the same RAR archive.
This function has no parameters.
Returns true if the current entry is encrypted and false otherwise.
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https://www.php.net/manual/en/rarentry.isencrypted.php