How to get file relative path using PHP

How to get the relative path of a file using PHP? This article mainly introduces the method of obtaining the relative path of a file in PHP, and implements the function of obtaining the relative path of a file through a custom function. I hope to be helpful.

The example in this article describes how PHP obtains the relative path of a file. Share it with everyone for your reference. The specific implementation method is as follows:

<?php
$a = &#39;/a/b/c/d/e.php&#39;;
$b = &#39;/a/b/12/34/c.php&#39;;
//../../12/34/c.php
echo getRelativelyPath($a,$b);
//求$b相对于$a的相对路径
function getRelativelyPath($a,$b){ 
$a=explode(&#39;/&#39;,$a);
$b=explode(&#39;/&#39;,$b);
var_dump($a);
//print_r($b);
$c=array_values(array_diff($a,$b));
$d=array_values(array_diff($b,$a));
// var_dump($c);
//var_dump($d);
array_pop($c);
foreach($c as &$v){
$v=&#39;..&#39;;
}
var_dump($c);
var_dump($d);
$arr=array_merge($c,$d);
var_dump($arr);
$str=implode("/",$arr);
echo $str;
}

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