php array-search returns a blank

Question

In the following code: echo $key returns a blank but echo $text[2] returns the word at that index. Can someone explain why is array-search not working here?
It does work when I test it with a key => value type array.

<?php

$myfile = fopen("test.txt", "r") or die("Unable to open file!");
while(!feof($myfile)) {
$text[] = fgets($myfile);
}
fclose($myfile);

$word = $_POST['word'];
$key = array_search($word, $text);

echo $key
?>

Answer 1

where is the form you are using for this?

Answer 2

Thanks for your response. The problem was in the array. The entries all included \n from the test.txt file.