PHP get value from file function acts wierd

Question

The function reads two strings from file data.db (utf-8). The file contains strings: '123' and '123'. I checked it via ECHO and it displays the content correctly. Thus im sure the problem is not in the file.

When I try to match the values with the file the variable $access never change.

 //got data from $_POST....

function au_check($login,$psw){
$f = file('data.db');
$l = $f[0];
$p = $f[1];

$access = 'fail';

if ($login==$l && $psw==$p){ 
    $access='CHANGED';
}
return $access;

}

echo (au_check($_POST['login'],$_POST['pass'])); //returns FAIL :((((

BUT! If i change my values DIRECTLY in code IT WORKS...
//got data from $_POST....

function au_check($login,$psw){
    $f = file('data.db');
    $l = '123';
    $p = '123';

    $access = 'fail';

    if ($login==$l && $psw==$p){ 
        $access='CHANGED';
    }
   return $access;

}

echo (au_check($_POST['login'],$_POST['pass'])); //returns CHANGED.
?>

plz help! how to fix and what is wrong? that's so weird ....

What's the output of `print_r($f);`? You might have to `trim()` things up — Hanky Panky, Feb 04 '16 at 05:40
It might be possible that `$login/$psw` and `$l/$p`both doesn't have same datatype values, so you may need to do **type casting** before doing comparision — Haridarshan, Feb 04 '16 at 05:42
@Haridarshan `===` = Identical true, `==` = value true. [Source](http://stackoverflow.com/a/6316807/2518525). (*You don't need to cast*) — Darren, Feb 04 '16 at 05:44
THANK YOU! the problem was in some whitespaces after reading... hmm never had this problem before. Untill i moved to Brackets editor. — Andrew Bro, Feb 04 '16 at 05:47

score 1 · Answer 1 · answered Feb 04 '16 at 05:45

1

file returns the lines, complete with newline character.

Use something like this to trim them off (the trim function is too heavy-handed):

$lines = file('data.db');
$f = array_map(function($line) {return rtrim($line,"\r\n");},$lines);

answered Feb 04 '16 at 05:45

Niet the Dark Absol

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@Hanky웃Panky That would fall under the heavy-handedness that `trim` has. Values in a "one-value per line" format should be allowed to have trailing spaces. In this case, we should *only* strip the end-of-line itself. – Niet the Dark Absol Feb 04 '16 at 05:52

PHP get value from file function acts wierd

1 Answers1