PHP function compute relative paths of two files

Sina has an interview question: write a php function to calculate the relative path of the two files? Php // calculate c. php Vs. e. the relative path of php should be .. /.. /12/34 $ a =/a/B/c/d/e. php; $ B =/a/B/12/34/c. php; getpathinfo ($ a, $ B); fun... "> <LINKhref =

 

Sina has an interview question: write a php function to calculate the relative path of the two files? Php // calculate c. php Vs. e. the relative path of php should be .. /.. /12/34 $ a =/a/B/c/d/e. php; $ B =/a/B/12/34/c. php; getpathinfo ($ a, $ B); function getpathinfo ($ a, $ B) {$

Sina has an interview question: write a php function to calculate the relative path of the two files

　　

// Calculate the relative path of c. php to e. php. it should be ../12/34

$ A = '/a/B/c/d/e. php ';

$ B = '/a/B/12/34/c. php ';

Getpathinfo ($ a, $ B );

Function getpathinfo ($ a, $ B ){

$ A2array = explode ('/', $ );

$ B2array = explode ('/', $ B );

$ Pathinfo = '';

For ($ I = 1; $ I <= count ($ b2array)-2; $ I ++ ){

$ Pathinfo. = $ a2array [$ I] = $ b2array [$ I]? '../': $ B2array [$ I]. '/';

}

Print_R ($ pathinfo );

}

?>

There is also a complicated method that is not perfect. The idea is correct and can be studied.

　　

$ A = 'AA/bb/cc/dd/a. php ';

$ B = 'AA/bb/11/22/33/B. php ';

// Write a function that counts the relative paths of two files.

Function GetNum ($ variant, $ variant2 ){

$ Pth1 = null;

$ Pth1 = null;

$ Tmp = array ();

// Determine whether the files under the path exist.

If (is_file ($ variant) & is_file ($ variant2 )){

$ Len1 = count ($ pth1 = explode ('/', dirname ($ variant )));

$ Len2 = count ($ PH2 = explode ('/', dirname ($ variant2 )));

$ Maxlen = max ($ len1, $ len2 );

For ($ I = 1; $ I <$ maxlen; $ I ++ ){

If ($ pth1 [$ I]! = $ P2[ $ I] & isset ($ pth1 [$ I]) {

If (isset ($ p2[ $ I]) $ tmp [] = $ p2[ $ I];

} Else {

$ Tmp [] = $ p2[ $ I];

$ Pathe. = '../';

}

}

Return $ pathe. implode ('/', $ tmp). '/'. basename ($ variant2 );

} Else {

The return 'path is invalid! ';

}

}

Print_r (GetNum ($ a, $ B ));

?>