Use PHP to calculate the relative paths of the two paths

2020-06-15 07:50:40
OfStack

<html>
     <body>
         <?php
             function relativePath($aPath, $bPath) {
                 $aArr = explode('/', $aPath);    //explode The function is used to slice strings , Returns the sharded array , Here use '/' Split string 
                 $bArr = explode('/', $bPath);
                 $aDiffToB = array_diff_assoc($aArr, $bArr);    //array_diff_assoc() Used to get A An array with the B The difference set of elements between arrays ,Key and Value They're all different as different elements , Return here to A Array and B Different elements in an array 
                 $count = count($aDiffToB);

                 $path = '';
                 for($i = 0; $i < $count - 1; $i++){
                     $path .= '../'; 
                 }

                 $path .= implode('/', $aDiffToB);    //implode() Used to concatenate array elements with the specified string , To return to '/' String after concatenating an array element 

                 return $path;
             }

             echo relativePath('/a/b/c/d/a.php', '/a/b/1/2/b.php');
         ?>
     </body>
 </html>
Page output
. ./. ./c/d/a.php