PHP code together to find the PHP code for $b relative path relative to $ A

The topic of the PHP interview question:
$a = '/a/b/c/d/e.php '; $b = '/a/b/12/34/c.php '; Calculate $b relative path relative to $a should be: /.. /c/d
Answers to the PHP interview questions:

Copy the Code code as follows:

function getrelative ($a, $b) {
$arr = Explode ("/", $a);
$BRR = Explode ("/", $b);
$c = count ($arr)-2;
$d = count ($BRR)-2;
Minus two, one is not in the back of the file name,
One is that the index of the array starts at 0, which is smaller than the number of the first dimension in the array.
$e = ($c > $d)? $c: $d;
$str 1 = $str 2 = ";
for ($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)
{
$str 1.= '/'. $cur _a;
}
if ($j <= $d)
{
$str 2.= ". /";
}
}
}
Return $str 2.substr ($str 1,1,strlen ($str 1));
}

The above describes the PHP code together to find $b relative to $ A relative path of the PHP code, including the contents of the PHP code, I hope the PHP tutorial interested in a friend helpful.

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