gzdeflate

Deflate a string (PHP 4 >= 4.0.4, PHP 5)
string gzdeflate ( string data [, int level] )

This function compress 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).

Parameters

data: The data to deflate.
level: 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.

Return Values

The deflated string or FALSE if an error occurred.

Examples

Example 2722. gzdeflate() example

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<?php

$compressed = gzdeflate('Compress me', 9);

echo $compressed;
?>

See Also

gzinflate()

gzcompress()

gzuncompress()

gzencode()

Code Examples / Notes » gzdeflate

giunta dot gaetano

Take care that that "PHP deflate" != "HTTP deflate". The deflate encoding used in HTTP is actually zlib encoded. This is what PHP functions return: gzencode() == gzip gzcompress() == zlib (aka. HTTP deflate) gzdeflate() == *raw* deflate encoding

denis dot noessler

if you have compressed data which is greater than 2 MB (system dependent), you will receive a buffer error by calling the function gzinflate(). be sure to to compress your data by a lower compression level, like 1. i.e.: gzdeflate($sData, 1);

romain dot lalaut

@ giunta dot gaetano at sea-aeroportimilano dot it No, gzdeflate() implements rfc1951. And rf2616 (http 1.1 specs) says "deflate : The "zlib" format defined in RFC 1950 [31] in combination with the "deflate" compression mechanism described in RFC 1951 [29]."

gzdeflate

Deflate a string (PHP 4 >= 4.0.4, PHP 5) string gzdeflate ( string data [, int level] )

Parameters

Return Values

Examples

Example 2722. gzdeflate() example

Code Examples / Notes » gzdeflate

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Deflate a string (PHP 4 >= 4.0.4, PHP 5)
string gzdeflate ( string data [, int level] )