ZipArchive::setEncryptionIndex

(PHP >= 7.2, PECL zip >= 1.14.0)

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

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

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.

成功时返回 TRUE，或者在失败时返回 FALSE。

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