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Editorial Team
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Asked: 2026-05-11T22:26:02+00:00

This should be a simple question, but I just can’t recall the relevant API.

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This should be a simple question, but I just can’t recall the relevant API. A search on google with the term "combine directory name php" doesn’t yield any results . So I guess I am doing both myself and the programming community a service by asking this question. this is now the top entry returned by Google and DDG!

How to combine directory and file name to form a full file path in PHP? Let’s say the directory name is "D:\setup program", and the file name is "mj.txt". The method should return me, on Windows "D:\setup program\mj.txt". Of course the method should return the correct file path in Linux or other OS.

The related function in .Net is Path.Combine, but in PHP, I couldn’t recall that, even though I must have seen it before.

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1 Answer

  1. Editorial Team
    $filepath = $path . DIRECTORY_SEPARATOR . $file;

    Although in newer versions of PHP it doesn’t matter which way the slashes go, so it is fine to always use forward slashes.

    You can get a correct absolute path using realpath(), this will also remove things like extra unnecessary slashes and resolve references like ../. It will return false if the path is not valid.

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