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一道求$b相对于$a的相对路径的php代码

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">
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 2014-12-14 19:42:06 转载来源: 网络整理/侵权必删

本文是一道求$b相对于$a的相对路径的php实现代码，感兴趣的同学参考下。 php面试题的题目： $a = '/a/b/c/d/e.php'; $b = '/a/b/12/34/c.php'; //计算出 $b 相对于 $a 的相对路径应该是 ../../c/d php面试题的答案： function getRelative($a,$b) { $arr = explode("/",$a); $brr = explode("/",$b); $c = count($arr)-2; $d = count($brr)-2; //之所以减二，一个是不在后面的文件名， //一个是数组的索引是从0开始的，比数组中的第一维的个数要小一 $e = ($c>$d) ? $c:$d; $str1 = $str2 = ''; for ($j=0;$j<=$e;$j++) { $cur_a = isset($arr[$j]) ? $arr[$j] : ''

本文是一道求$b相对于$a的相对路径的php实现代码，感兴趣的同学参考下。

php面试题的题目：
$a = '/a/b/c/d/e.php'; $b = '/a/b/12/34/c.php'; //计算出 $b 相对于 $a 的相对路径应该是 ../../c/d

php面试题的答案：


function getRelative($a,$b) {
$arr = explode("/",$a);
$brr = explode("/",$b);
$c = count($arr)-2;
$d = count($brr)-2;
//之所以减二，一个是不在后面的文件名，
//一个是数组的索引是从0开始的，比数组中的第一维的个数要小一
$e = ($c>$d) ? $c:$d;
$str1 = $str2 = '';
for ($j=0;$j<=$e;$j++) {
$cur_a = isset($arr[$j]) ? $arr[$j] : '';
$cur_b = isset($brr[$j]) ? $brr[$j] : '';
if ($cur_a == $cur_b) {
continue;
} else {
if ($j <= $c)
{
$str1.='/'.$cur_a;
}
if ($j <= $d )
{
$str2.="../";
}
}
}
return $str2.substr($str1,1,strlen($str1));
}

 


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