PHPCon Poland 2024


(PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)

mcrypt_enc_is_block_algorithm_modeChecks whether the encryption of the opened mode works on blocks


This function has been DEPRECATED as of PHP 7.1.0 and REMOVED as of PHP 7.2.0. Relying on this function is highly discouraged.


mcrypt_enc_is_block_algorithm_mode(resource $td): bool

Tells whether the algorithm of the opened mode works on blocks (e.g. false for stream, and true for cbc, cfb, ofb)..



The encryption descriptor.

Return Values

Returns true if the mode is for use with block algorithms, otherwise it returns false.

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