read text file from php with post

Question

What is the problem with my code? I've fot two files in the same folder: index.php and pass.txt:

This is pass.txt:

qwerty

And this is index.php:

<?php 

$password=file_get_contents('pass.txt');

session_start();
if (isset($_SESSION['timeout'])) {
    if ($_SESSION['timeout'] + 10 < time()) {
        session_destroy(); } }
else {
    $_SESSION['pass']="" ;  $_SESSION['timeout']=time(); }


if (isset($_POST["pass"])) {
    $_SESSION['pass']=$_POST['pass'] ; 
}

if($_SESSION['pass'] == $password)  {
    echo 'you are logged in';
} else {
    echo'<form method="POST" action="">
        <input type="password" name="pass">
        </form>';
}

?>

PROBLEM: When I write 'qwerty' in the input field and submit, it doesn't display "your ale logged in"

It is a mere syntax question for further development, not intended to protect anything.

Other answered questions did not solve my problem.

you have got `session_start()` at the very top of the page have you? — Professor Abronsius, Sep 15 '15 at 12:35
what if you change `if($_SESSION['pass'] == $password) {` to `if($_POST['pass'] == $password) {`, do the get what you want ?, if yes, seems to be a session problem. — jitendrapurohit, Sep 15 '15 at 12:44
well then, your input is not posted, where's the submit button ? — jitendrapurohit, Sep 15 '15 at 12:48

magic-sudo · Answer 1 · 2015-09-15T12:45:08.447

1

In the begening of your index.php start session session_start(); To compare strings in php use http://php.net/manual/en/function.strcmp.php strcmp();

if (strcmp($_SESSION['pass'], $password))  {
    echo 'you are logged in';
} else {
    echo'<form method="POST" action="">
    <input type="password" name="pass">
    </form>';
}

edited Sep 15 '15 at 12:45

answered Sep 15 '15 at 12:41

magic-sudo

1,206
9
15

already added to the question, It seems not to be the problem... must have to do with file reading. – Kathlyn Sep 15 '15 at 12:42

Professor Abronsius · Accepted Answer · 2015-09-15T12:56:19.873

I think the issue may have been the call to file_get_contents - I tried the following and it appears to function correctly. ( oops, forgot the session_start() for this example )

<?php
        session_start();

        if( isset( $_SESSION['timeout'] ) && $_SESSION['timeout'] + 10 < time() ) session_destroy();
        else {
            $_SESSION['pass']="" ;
            $_SESSION['timeout']=time();
        }

        $password=file_get_contents( realpath( __DIR__.'/pass.txt' ), FILE_TEXT | FILE_SKIP_EMPTY_LINES );
        echo 'The password from the text file: '. $password;


        if( isset( $_POST["pass"] ) ) $_SESSION['pass']=$_POST['pass'] ; 

        if( strlen( $password ) > 0 && trim( $_SESSION['pass'] ) === trim( $password ) )  {
            echo 'you are logged in';
        } else {
            /* for dev I use a local file, aliased as /stackoverflow/ */
            echo'<form method="POST" action="">
                    <input type="password" name="pass">
                    <input type="submit" value="login">
                </form>';
        }
?>

It is essentially the same code as yours - except for the `file_get_contents`. Which bits in particular do you find "complex"? — Professor Abronsius, Sep 15 '15 at 12:57

ashish singh · Answer 3 · 2015-09-15T12:58:21.597

0

Use this code-

<?php 

$password=file_get_contents(realpath( __DIR__.'/pass.txt' ),FILE_TEXT | FILE_SKIP_EMPTY_LINES);

if (isset($_POST["pass"])) {
    $_SESSION['pass']=$_POST['pass'] ; 
}

if($_SESSION['pass'] == $password)  {
    echo 'you are logged in';
} else {
    echo'<form method="POST" action="">
        <input type="password" name="pass">
        </form>';
}

?>

edited Sep 15 '15 at 12:58

answered Sep 15 '15 at 12:47

ashish singh

119
5

It didn't worked because of the method you replaced `$password=file_get_contents('pass.txt',true);` when the answer was accepted from @RamRaider with `$password=file_get_contents(realpath( __DIR__.'/pass.txt' ),FILE_TEXT | FILE_SKIP_EMPTY_LINES);`. – KuKeC Sep 15 '15 at 15:28

read text file from php with post

3 Answers3