MySql does not update column

I am trying to add two columns to a database when running a script. The problem is when the second column is created it is of the type int

when I really want it varchar2

.

My request:

$query1 = "ALTER TABLE `keyword_table` ADD `".$currentWeek."` INT NOT NULL AFTER `".$previousWeek."_url`";
$query2 = "ALTER TABLE `keyword_table` ADD `".$currentWeek."_url` VARCHAR2(100) NOT NULL AFTER `".$currentWeek."`"

      

        
        
        
      

    

Query when variables are placed:

ALTER TABLE `keyword_table` ADD `07_07_2015` INT NOT NULL AFTER `01_07_2015_url`
ALTER TABLE `keyword_table` ADD `07_07_2015_url` VARCHAR2(100) NOT NULL AFTER `07_07_2015`

      

        
        
        
      

    

These queries are how I wanted them, however, when the second query is executed, it creates the column where I want, but as int

not a varchar2

. I checked the syntax, I went to PhpMyAdmin and looked at the syntax it uses when inserting a column and it is the same as above.

Any ideas why it doesn't make the column correct?

edits

I ran the code like this:

$query = "ALTER TABLE `keyword_table` ADD `".$currentWeek."` INT NOT NULL AFTER `".$previousWeek."_url`";
mysqli_query($conn, $query);
echo $query.'<br>';
$query = "ALTER TABLE `keyword_table` ADD `".$currentWeek."_url` VARCHAR2(100) NOT NULL AFTER `".$currentWeek."`";
mysqli_query($conn, $query);
echo $query.'<br>';