in_array() not working

Question

My code:

<?php

$pass = "12345";

//checkPass($pass, $user, $length);
$file = file_get_contents("common.txt");
$array = explode("\n", $file);
if(in_array($pass, $array) == true) {
 echo "it's in the array";
}
?>

first few lines of the array (i used print_r($array)...):

Array ( [0] => 12345 [1] => abc123 [2] => password [3] => computer [4] => 123456 
[5] => tigger [6] => 1234 [7] => a1b2c3 [8] => qwerty [9] => 123 [10] => xxx 
[11] => money [12] => test [13] => carmen [14] => mickey [15] => secret 
[16] => summer [17] => internet [18] => service [19] => canada [20] => hello 
[21] => ranger [22] => shadow [23] => baseball [24] => donald [25] => harley 
[26] => hockey [27] => letmein [28] => maggie [29] => mike [30] => mustang 
[31] => snoopy

Answer 1

If your file uses Windows linebreaks (lines end in \r\n), you'll get an invisible \r character at the end of each of your strings. Test for it by running strlen() on one of them:

echo $array[0] . ': ' . strlen($array[0]) . ' chars';

If you get something like

12345: 6 chars

You know that's the problem! You can get rid of these characters after exploding the array using array_map() with trim():

$array = array_map('trim', $array);