字符截取

截取中英文混合字符串长度，不足用...不足

 1/**
 2 * 截取中英混合字符给长度，不足用补足
 3 *
 4 * @param string $str2
 5 * @param int $length
 6 * @param char $point
 7 * @return string String
 8 */
 9function subString($str2,$length,$point='')
10{
11        $str2 = trim($str2);
12        $sLen = strlen($str2);    //中英混合字符编码长度
13        $n1 = 0;
14        $n2 = 0;
15        $p = '.';
16        for($i=0;$i<$sLen;$i++)
17        {
18          if(ord($str2[$i])>128) $n1++;
19        }
20        $strLength = $sLen - $n1/2; //中英混合字符表面长度
21        
22        if(!empty($str2))
23        {
24                if($strLength > $length)
25                {
26                        for($i=0;$i<$sLen;$i++)
27                        {
28                                if(ord($str2[$i])>128) $n2++;
29                                if($n2%2 == 0)
30                                {
31                                        if(($i-$n2/2)== $length)
32                                        $cutLen = $i;
33                                }
34                        }
35                        $subs = substr($str2,0,$cutLen);
36                }
37                else
38                {                        
39                        for($j = 0;$j < ($length-$strLength); $j++)
40                        {
41                               $point .= $p;
42
43                        }
44                        $subs = $str2.$point;
45                }
46                return $subs;
47        }
48        else
49        {
50                return -1;
51        }
52}
53$str2 = "abc利de坚on合众国白宫克林顿";
54echo subString($str2,17);

计算文件夹大小
 1/** 计算文件夹大小
 2 *   $pathString:文件夹路径
 3 *   $floderSize:文件夹大小
 4 *   $separator:分隔符
 5 */
 6 function ifDir($pathString,&$floderSize=0,$separator='/')
 7 {
 8
 9         if(is_dir($pathString))
10         {
11                if($handle = opendir($pathString))
12                {
13                        while(($file = readdir($handle))!==false)
14                        {
15                                if($file != '.'&&$file != '..')
16                                {
17                                        $psf = $pathString.$separator.$file;
18                                        if(is_dir($psf ))
19                                        ifDir($psf,$floderSize);           //递归调
20                                        else
21                                        {
22                                                $floderSize += filesize($psf);
23                                        }
24                                }
25                        }
26                }
27                return ($floderSize);
28        }
29        else
30        return -1;
31
32 }
33
34//e.g
35$path = "/usr/local/code";
36//$path = "sdf";
37if(ifDir($path)!= -1)
38{
39$floderSize = ifDir($path)/1024;
40echo $floderSize;
41}
42else
43echo "路径有误！";