Created
February 10, 2016 19:41
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Comparison of compress and deflate
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| <?php echo "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"; ?> | |
| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> | |
| <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> | |
| <head> | |
| <title>PHP compressions</title> | |
| <meta http-equiv="content-type" content="text/html;charset=utf-8" /> | |
| <meta http-equiv="content-style-type" content="text/css" /> | |
| <style type="text/css"> | |
| th { text-align:right; } | |
| .line_number { font-weight:bold; } | |
| p.hex { font-family:"Courier New"; font-size:10pt; white-space:pre; } | |
| </style> | |
| </head> | |
| <body> | |
| <?php | |
| // Test the difference in DEFLATE vs. COMPRESS | |
| $str = pack("c*", 50, 60, 100, 255, 255, 255, 0, 0, 16, 16, 50, 60, 100, 255, 255, 255, 0, 0, 16, 16, 50, 60, 100, 255, 255, 255, 0, 0, 16, 16, 50, 60, 100, 255, 255, 255, 0, 16, 16, 16, 50, 60, 100, 255, 255, 255, 0, 1, 16, 10, 50, 60, 100, 235, 255, 245, 0, 0, 16, 16, 50, 60, 100, 255, 255, 255, 0, 0, 16, 16, 214, 186, 196, 72, 40, 92, 129, 184, 139, 27, 193, 42, 228, 129, 174, 156, 207, 157, 104, 207, 84, 108, 137, 108, 75, 67, 83, 11, 9, 198, 136, 34, 90, 68, 81, 117, 209, 101, 25, 144, 85, 137, 8, 85, 19, 141, 161, 45, 88, 53, 55, 58, 2, 195, 153, 249, 114, 53, 62, 16, 211, 4, 102, 100, 121, 254, 19, 196, 4, 194, 238, 68, 216, 192, 187, 20, 240, 141, 20, 57, 99, 135, 213, 27, 105, 249, 58, 55, 211, 43, 161, 226, 172, 6, 197, 226, 132, 108, 11, 49); | |
| echo "<h1>Original</h1>"; | |
| echo showHex($str); | |
| $compress = gzcompress($str, 1); | |
| echo "<h1>COMPRESS 1</h1>"; | |
| echo showHex($compress); | |
| $compress = gzcompress($str, 5); | |
| echo "<h1>COMPRESS 5</h1>"; | |
| echo showHex($compress); | |
| $compress = gzcompress($str, 9); | |
| echo "<h1>COMPRESS 9</h1>"; | |
| echo showHex($compress); | |
| $deflate = gzdeflate($str, 1); | |
| echo "<h1>DEFLATE 1</h1>"; | |
| echo showHex($deflate); | |
| $deflate = gzdeflate($str, 5); | |
| echo "<h1>DEFLATE 5</h1>"; | |
| echo showHex($deflate); | |
| $deflate = gzdeflate($str, 9); | |
| echo "<h1>DEFLATE 9</h1>"; | |
| echo showHex($deflate); | |
| function showHex($data, $lineSize = 32) { | |
| $out = "<p class=\"hex\">"; | |
| for($i=0; $i<strlen($data); $i+=$lineSize) { | |
| $out .= "<span class=\"line_number\">".sprintf("%04X: ", $i)."</span>"; | |
| for($n=0; $n<$lineSize; $n++) { | |
| $x = $n+$i; | |
| $out .= ($x<strlen($data))? sprintf("%02X", ord($data[$x])) : " "; | |
| $out .= (fmod($x+1, 8) == 0)? " " : " "; | |
| } | |
| $out .= "| "; | |
| for ($n=0; $n<$lineSize; $n++) { | |
| $x = $n+$i; | |
| $out .= ($x<strlen($data))? htmlentities(readableASCII($data[$x])) : " "; | |
| $out .= (fmod($x+1, 8) == 0)? " " : ""; | |
| } | |
| $out .= "\n"; | |
| } | |
| $out .= "</p>"; | |
| return $out; | |
| } | |
| function readableASCII($chr) { | |
| if (ord($chr[0]) >= 32 && ord($chr[0]) <= 126) { | |
| return $chr[0]; | |
| } else { | |
| return "."; | |
| } | |
| } | |
| ?> | |
| </body> | |
| </html> |
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