读取数组中的.txt文件，检查数组中是否存在变量输入

This is my HTML code:

<?php
        $filename = 'codes.txt';
        $data = file($filename);
         foreach($data as $key => $val){
             $array[] =  $val;
         }
?>
<form id="checkinput" action="#">
<input class="zipcodes" name="zipcodes" value="" type="text">
<input class="zip-sub" type="button" value="Continue" id="submit">
</form>

Thi is jQuery code:

    jQuery(document).ready(function() {
    jQuery('.zip-sub').click(function() {
        var zip = jQuery('.zipcodes').val();
        var zipcodelist = <?php echo json_encode($array); ?>;
        if( jQuery.inArray(zip, zipcodelist) != -1){
             alert('value is .txt file !');
        } else {
             alert('value is not .txt file');
        }
    });

});

This is type of some variable in .txt file:

12345
23456
56789

What i need: when i fill data in input field i can check its in variable in .txt file or not

Its working with last variable in array, not at all. I dont know where's the code is wrong ? Pls help. Thanks in advance !

Fix your .txt file to look more like this:

12345,23456,56789

Don't add in line breaks like this:

12345, 23456, 56789