Best way to compress string in PHP [duplicate]

Answer 1

Im not sure your numbers are right, tho you could use gzdeflate instead of gzcompress as gzcompress adds 6 bytes to the output (2 extra bytes at the beginning and 4 extra bytes at the end).

A simple test shows a 1756800 length string compressed to 99 bytes by double compressing it, 5164 bytes if compressed once.

$string = str_repeat('1234567890' . implode('', range('a', 'z')), 48800);

echo strlen($string); //1756800 bytes

$compressed = gzdeflate($string,  9);
$compressed = gzdeflate($compressed, 9);

echo strlen($compressed); //99 bytes

echo gzinflate(gzinflate($compressed));