Remove root directory from a directory path string - PHP

Question

I have a variable like $path = "dir1/dir2/dir1/dir4/"; etc.. etc..

I want to remove the first member dir1/ and want result like dir2/dir1/dir4/.

I think it is possible by making the variable an array by explode('/', $path). How can I remove the first member vrom array and reconstruct that array into a text variable??

How can I achieve this in PHP?

hakre · Accepted Answer · 2012-07-01 14:29:09Z

8

According to your updated question

Only explode into two parts, take the second one. In case the second one does not exists, give it NULL:

list(, $result) = explode("/", $path, 2) + array( 1 => NULL);

OR

$array = explode("/", $path);
unset($array[0]);
echo $text = implode("/", $array);

edited Jul 1, 2012 at 14:29

hakre

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answered Mar 14, 2012 at 6:39

Shakti Singh

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7 Comments

meze Over a year ago

@blasteralfred why did you choose 3 lines over one simple line with regexp?

Shakti Singh Over a year ago

@meze: regexp are slow than these functions and you can also convert these three lines in one line of code

meze Over a year ago

how do you know that regexp is slower than these lines? Regexp isn't always slow. In some cases regexp will be faster than those three lines. And you can't convert it into one line of code.

meze Over a year ago

It's not "these three lines" anymore, it's different now ;) And it became slower than the regexp solution because internally it will create 2 arrays...

Shakti Singh Over a year ago

@meze: And do you know what preg_replace internally does? It is not recommended to use regex until you really need it.

|

meze · Accepted Answer · 2012-03-14 12:13:03Z

5

preg_replace('~^[^/]+/~', '', $path);

or if you don't want regexp:

substr($path, strpos($path, '/') + 1);

edited Mar 14, 2012 at 12:13

answered Mar 14, 2012 at 6:33

meze

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1 Comment

mickmackusa Over a year ago

This answer is missing its educational explanation. Not all researchers understand regex pattern syntax. There should probably be a warning in this answer regarding the fact that you are not checking strpos() for === false, and any passed in string without slashes will have unintended mutation.

Andreas Louv · Accepted Answer · 2012-11-06 00:02:19Z

1

$result = explode("/", $path); // Pull it apart
array_shift($result); // Pop the first index off array
$result = implode("/", $result); // Put it together again

edited Nov 6, 2012 at 0:02

Andreas Louv

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answered Mar 14, 2012 at 6:40

Menztrual

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Comments

heyanshukla · Accepted Answer · 2012-03-14 06:36:12Z

0

You can do like that $result= explode("/", $path);. You will get result as an array.

answered Mar 14, 2012 at 6:36

heyanshukla

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