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php压缩和解压缩字符串的方法

本文实例讲述了php压缩和解压缩字符串的方法 。分享给大家供大家参考 。具体如下：

下面php代码通过gzcompress和gzuncompress压缩和解压缩字符串，可以设定压缩级别

$str = Hello I am a very very very very long string;
$compressed = gzcompress($str, 9);//压缩级别为9
$uncompressed = gzuncompress($compressed);
echo $str, "\n";
echo $uncompressed, "\n";
echo base64_encode($compressed), "\n";
echo bin2hex($compressed), "\n";
echo urlencode($compressed), "\n";

希望本文所述对大家的php程序设计有所帮助 。