php - Permission denied when trying to write file -

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i'm getting error:

warning: fopen(name.txt): failed open stream: permission denied in /applications/xampp/xamppfiles/htdocs/phptests/post.php on line 5 not write file

i'm trying retrieve form data , pass text file so:

<?php    $name    = $_post['name'];    $surname = $_post['surname'];     $fh = fopen("name.txt", "w") or die("could not write file");     fwrite($fh, $name, $surname);    fclose($fh);    ?>

i'm using komodo edit , php files saved in "htdocs" folder provided xampp.

can tell me why i'm not able write file?

as error telling file not writable.

to fix , can update file permission

cd <directory of name.txt> chmod 777 name.txt

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