CODEWITHSUNDEEP
php
Clyde Winux
Clyde Winux

Reputation: 63

Comparing between data from a file and from a form fails even though it's the same

I have a problem with my webpage. I have this admin.txt file that contains "foo", and "bar" on the next line. Now on my webpage is a form where I must input two values, and when submitted will check if the values I inputted on the text inputs are equal with the values in the text file, but always returns fail even if i typed in the same values with the text file which is foo and bar. Check my codes:

index.php

<?php
<form method="post" action="check.php">
<input type="text" name="text1">
<input type="text" name="text2">
<input type="submit">
?>

check.php

$location = "txt/admin.txt";
if ( file_exists( $location )) {
$page = join("",file("$location"));
$txt = explode("\n", $page);}
$text1 = $_POST['text1'];
$text2 = $_POST['text2'];

if ($text1==$txt[0] && $text2==$txt[1]){
echo "success.";
}
else
echo "fail";

Upvotes: 0

Views: 39

Answers (1)

Pekka
Pekka

Reputation: 449613

There may be additional invisible line break characters that cause the comparison to fail.

In Windows for example, the line break is \r\n, meaning your explode() will leave the \r in the data.

Always use trim() on data coming from files.

Alternatively, you can also use the file() function with the FILE_IGNORE_NEW_LINES parameter.

Upvotes: 3

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