inflate_init

    (PHP 7, PHP 8)

    inflate_init — Initialize an incremental inflate context

    Description

    inflate_init(int $encoding, array $options = []): InflateContext|false

    Initialize an incremental inflate context with the specified encoding.

    Parameters

    encoding

    One of the ZLIB_ENCODING_* constants.

    options

    An associative array which may contain the following elements:

    level

    The compression level in range -1..9; defaults to -1.

    memory

    The compression memory level in range 1..9; defaults to 8.

    window

    The zlib window size (logarithmic) in range 8..15; defaults to 15.

    strategy

    One of ZLIB_FILTERED, ZLIB_HUFFMAN_ONLY, ZLIB_RLE, ZLIB_FIXED or ZLIB_DEFAULT_STRATEGY (the default).

    dictionary

    A string or an array of strings of the preset dictionary (default: no preset dictionary).

    Return Values

    Returns an inflate context resource (zlib.inflate) on success, or false on failure.

    Errors/Exceptions

    If an invalid encoding or option is passed to options, or the context couldn't be created, an error of level E_WARNING is generated.

    Changelog

    Version Description
    8.0.0 On success, this function returns an InflateContext instance now; previously, a resource was returned.

    Notes

    Caution

    Unlike gzinflate(), incremental inflate contexts do not constrain the length of the decoded data, so provide no automatic protection against Zip bombs.

    See Also

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