版本号对比

 1 /**
 2  * @param $version 待检测版本
 3  * @param $base_version 基准版本(一般是最新版本)
 4  * @return int
 5  * desc 待检测版本 > 基准版本 返回值大于0
 6  */
 7 function compareVersion($version, $base_version)
 8 {
 9     $arrVersion = explode(‘.‘, $version);
10     $formatVersion = ‘‘;
11     foreach ($arrVersion as $v) {
12         $formatVersion .= str_pad($v, 4, ‘0‘, STR_PAD_LEFT);
13     }
14 
15     $arrBaseVersion = explode(‘.‘, $base_version);
16     $formatBaseVersion = ‘‘;
17     foreach ($arrBaseVersion as $v) {
18         $formatBaseVersion .= str_pad($v, 4, ‘0‘, STR_PAD_LEFT);
19     }
20 
21     return strcmp($formatVersion, $formatBaseVersion);
22 }