How can PHP be used to compare user input with the contents of a file, considering line breaks?

When comparing user input with the contents of a file in PHP, it is important to account for line breaks that may be present in the file. One way to do this is by using the file() function to read the file into an array, where each element represents a line of the file. Then, you can iterate through the array and compare each line with the user input, taking into consideration any line breaks that may exist. 

$user_input = $_POST['user_input'];
$file_contents = file('file.txt', FILE_IGNORE_NEW_LINES);

foreach ($file_contents as $line) {
    if ($line === $user_input) {
        echo "Match found: $line";
        break;
    }
}

Keywords

PHP file handling user input string comparison line breaks

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