A case of implementing relative paths using PHP algorithm

This article mainly introduces relevant information on examples of implementing relative paths in the PHP algorithm. I hope this article can help everyone realize such a function. Friends in need can refer to it

php Algorithm Example of Implementing Relative Path

Calculate the relative path (the same directory can be ignored and represented by ../ or ./)

Implementation code:

class Relatively{ 
  private function __construct(){ 
     
  } 
  /** 
   * 算出相对路径（相同的目录可以忽略用../ 或者 ./ 表示） 
   * @param Strint $path1 
   * @param Strint $path2 
   * @return string 
   */ 
  public static function relaroot($path1,$path2){ 
    $rearray=array(); 
    $arr1=explode('/', dirname($path1)); 
    $arr2=explode('/', dirname($path2)); 
    for($i=0,$len=count($arr2)-1;$i<$len;$i++){ 
      if($arr1[$i]!=$arr2[$i]){ 
        break; 
      } 
      if($i==1){ 
        $rearray=array(); 
      } 
      if($i!=1 && $i<$len){ 
        $rearray=array_fill(0,$len-$i,&#39;..&#39;); 
      } 
      if($i==$len){ 
        $rearray=array(&#39;./&#39;); 
      } 
    } 
    $reroot=array_merge($rearray,array_slice($arr2, $i)); 
    return implode(&#39;/&#39;, $reroot); 
  } 
} 
$path1="a/b/c/d/index.php"; 
$path2="/a/b/12/34/index1.php"; 
$a=Relatively::relaroot($path1, $path2); 
echo $a;

The above is the detailed content of A case of implementing relative paths using PHP algorithm. For more information, please follow other related articles on the PHP Chinese website!