ZipArchive::setEncryptionIndex

(PHP >= 7.2.0, PECL zip >= 1.14.0)

ZipArchive::setEncryptionIndex — Set the encryption method of an entry defined by its index

ZipArchive::setEncryptionIndex ( int $index , string $method [, string $password ] ) : bool

Set the encryption method of an entry defined by its index.

index: Index of the entry.
method: The encryption method defined by one of the ZipArchive::EM_ constants.
password: Optional password, default used when missing.

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ZipArchive::setPassword() - Set the password for the active archive
ZipArchive::setEncryptionName() - Set the encryption method of an entry defined by its name