PHP用变量名创建路径和文件夹

Question

In PHP I am trying to make a new database type folder for different people on sign up and add files. I could easily create files and write to them but for some reason every time i try to have PHP create folders using the persons username variable as the path, all it does is create a folder named $username.

Here is my code cut down to the basics of that part.

<?php
$title = $_POST["title"];
$myFile = "/users/$username/title.txt";
$fh = fopen($myFile, 'w') or die("There was an error in changing your title.  <br />");
$stringData = "$title\n";
fwrite($fh, $stringData);
fclose($fh);

$template = $_POST["temp"];
$myFile = "$structure/template.txt";
$fh = fopen($myFile, 'w') or die("There was an error in changing your template.  <br />");
$stringData = "$template\n";
fwrite($fh, $stringData);
fclose($fh);
?>

Answer 1

Try This

<?php
$title = $_POST["title"];
$myFile = "/users/".$username."/title.txt";
$fh = fopen($myFile, 'w') or die("There was an error in changing your title.  <br />");
$stringData = $title."\n";
fwrite($fh, $stringData);
fclose($fh);

$template = $_POST["temp"];
$myFile = $structure."/template.txt";
$fh = fopen($myFile, 'w') or die("There was an error in changing your template.  <br />");
$stringData = $template."\n";
fwrite($fh, $stringData);
fclose($fh);
?>

Answer 2

To make this work, you do need to break out the variable (as Ben Griffiths mentioned) from the string and check it isn't empty. Also, make sure you do make the directory first created using mkdir() (aschuler mentioned this as well). The code, therefore, may look something like this but without knowing where $username, $structure, $title and $template come from, you may need to alter this a little:

<?php
$title = $_POST['title'];
if (trim($username) == '') {
    die("No username passed in!");
} else {
    $userdir = "/users".$username."/";
    mkdir($userdir);
    $fh = fopen($userdir."title.txt", 'w') or die("There was an error in changing your title.  <br />");

    $stringData = $title."\n";
    fwrite($fh, $stringData);
    fclose($fh);
}

$template = $_POST['temp'];
if (trim($template) == '') {
    die("No template passed in!");
} else {
    $structdir = $structure."/";
    mkdir($structdir);
    $fh = fopen($structdir."template.txt", 'w') or die("There was an error in changing your template.  <br />");

    $stringData = $template."\n";
    fwrite($fh, $stringData);
    fclose($fh);
}

?>

Hope this helps.

Answer 3

You're saying that this /users/$username/title.txt create exactly /users/$username/title.txt

so Your problem is you need to catch $username first, I don't know how your code look but maybe this?

<?php $username=$_SESSION['username']; //retrieve the username 
    //rest of your code 
    $myFile = "/users/$username/title.txt";
$fh = fopen($myFile, 'w') or die("There was an error in changing your title.  <br />");
$stringData = "$title\n";
fwrite($fh, $stringData);
fclose($fh);

$template = $_POST["temp"];
$myFile = "$structure/template.txt";
$fh = fopen($myFile, 'w') or die("There was an error in changing your template.  <br />");
$stringData = "$template\n";
fwrite($fh, $stringData);
fclose($fh);
?>