PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8
gzdeflate - Deflate a string
Code Examples

gzdeflate( string$data, [int$level = -1], [int$encoding = ZLIB_ENCODING_RAW] ): string|false

This function compresses the given string using the DEFLATE data format.

For details on the DEFLATE compression algorithm see the document "DEFLATE Compressed Data Format Specification version 1.3" (RFC 1951).



The data to deflate.


The level of compression. Can be given as 0 for no compression up to 9 for maximum compression. If not given, the default compression level will be the default compression level of the zlib library.


One of ZLIB_ENCODING_* constants.

Return Values

The deflated string or false if an error occurred.

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Function gzdeflate:

Zlib Compression Functions

Most used PHP functions