log onto mysql and update column

"There needs to be" is not a question that we can answer.  This is something that should be a part of your basic library of examples.  You can copy the connection examples from this article.  
https://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/PHP_Databases/A_11177-PHP-MySQL-Deprecated-as-of-PHP-5-5-0.html

You can use the connection information over and over.  Usually a programmer would have a common script called at the top of all PHP scripts.  A data base connection might be included in the common script.

output same column using update

I very gently but strongly urge you to NOT do that.  Here is why:
http://en.wikipedia.org/wiki/Mung_%28computer_term%29

There are two good choices:  You can use ALTER TABLE to add a new column and you can update the new column as you convert the datetime strings into the ISO-8601 standard values.  Or you can copy the table and make the updates in the copied table.  I would prefer the first option, because you will be able to use a tool such as phpMyAdmin to examine the rows and make manual corrections if needed.  With the original and standardized datetime values in the same row you will have only one place to look for things that require manual intervention.

If you UPDATE the original rows by overwriting the original columns, you will have lost the original data.  In other words, the process is not reversible and once it is started it must be 100% successful, or you must accept an arbitrarily large failure rate.  Those are not circumstances you want to live with!  See Antipractice #2 and #3.
https://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/A_12293-AntiPHPatterns-and-AntiPHPractices.html

// OPEN A CONNECTION TO THE DATA BASE SERVER AND SELECT THE DB
$mysqli = new mysqli($db_host, $db_user, $db_word, $db_name);

// DID THE CONNECT/SELECT WORK OR FAIL?
if ($mysqli->connect_errno)
{
    $err
    = "CONNECT FAIL: "
    . $mysqli->connect_errno
    . ' '
    . $mysqli->connect_error
    ;
    trigger_error($err, E_USER_ERROR);
}
// SHOW WHAT THE DB CONNECTION OBJECT LOOKS LIKE
var_dump($mysqli);

Select allOpen in new window

 You can use ALTER TABLE to add a new column dateAgo_EDIT
so I can compare but I do not know the where statement.

do not know the where statement

Please see line 139 in the fourth code snippet of this question:
https://www.experts-exchange.com/questions/28319524/use-php-and-mysql-to-update-varchar-to-mysqldatetime-value-or-NULL.html

<?php // RAY_temp_rgb192.php
ini_set('display_errors', TRUE);
error_reporting(E_ALL);
echo '<pre>';


// SEE http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/Q_28319524.html


// old TEST DATA (I now want table data)
$arr = array
( 'just now'
, 'just now'
, 'just now'
, 'just now'
, '(17 mins ago)'
, '(07/25 11:26)'
, '(07/25 11:20)'
, '(07/25 11:19)'
, '2 days ago'
, '1 week ago'
, '2 weeks ago'
, '(12 hrs ago)'
, '(06/26 12:54)'
, '(07/25 09:58)'
, '(14 hrs ago)'
, '(07/25 11:01)'
, '(07/25 10:59)'
, '(07/25 10:24)'
, '(07/25 10:23)'
, '(07/25 09:48)'
, '(16 hrs ago)'
, '(20 hrs ago)'
, '(21 hrs ago)'
, '(07/25 22:27)'
, '(07/25 09:43)'
, '(07/26 12:44)'
, '(07/26 12:17)'
, '(07/26 11:06)'
, '(07/26 07:07)'
, '(07/24 17:47)'
, '(07/24 10:45)'
, '(07/24 08:31)'
, '(07/23 06:47)'
, '(07/23 06:35)'
, '(07/23 06:34)'
, '4 days ago'
, '5 days ago'
, '6 days ago'
, '3 weeks ago'
, '1 month ago'
, '3 days ago'
, '1 day ago'
, '(11 mins ago)'
, '(21 mins ago)'
, '(25 mins ago)'
, '(15 mins ago)'
, '(19 mins ago)'
, '(16 mins ago)'
, '(18 mins ago)'
, '(20 mins ago)'
, '(08/06 19:48)'
, '(22 mins ago)'
, '(23 mins ago)'
, '(24 mins ago)'
, '(26 mins ago)'
, '(27 mins ago)'
, '(08/07 06:06)'
, '(08/06 23:33)'
, '(08/06 20:27)'
, '(08/06 18:08)'
, '(08/06 14:42)'
, '(08/06 14:41)'
, '(08/06 10:14)'
, '(08/05 15:42)'
, '(08/05 15:33)'
, '(08/01 10:11)'
, '(08/04 05:57)'
, '(08/04 04:21)'
, '(08/03 17:08)'
, '(08/03 16:40)'
, '(08/01 10:15)'
, '(10 mins ago)'
, '(13 mins ago)'
, '(14 mins ago)'
, '(42 mins ago)'
, '(1 hr ago)'
, '(22 hrs ago)'
, '(08/07 07:37)'
, '(08/07 07:32)'
, '(08/07 07:29)'
, '(08/07 07:20)'
, '(11 hrs ago)'
, '(7 hrs ago)'
, '(08/05 16:57)'
, '(08/05 13:59)'
, '(08/05 12:34)'
, '(08/05 10:49)'
, '(08/04 15:49)'
, '(08/04 13:02)'
, '(08/04 12:12)'
, '(08/04 11:55)'
, '(08/04 04:48)'
, '(08/04 13:08)'
, '(08/04 12:11)'
, '(08/04 12:08)'
, '(08/04 02:31)'
, '(08/04 15:59)'
, '(08/04 15:58)'
, '(8 hrs ago)'
, '(9 hrs ago)'
, '(10 hrs ago)'
, '(09/03 11:45)'
, '2013-10-23 14:08:00'
, '2013-10-23 14:04:00'
, '2013-10-23 13:54:00'
, '2013-10-23 13:35:00'
, '2013-10-22 12:37:00'
, '2013-10-22 10:31:00'
, '2013-11-30 08:31:00'
)
;













// SEE http://www.experts-exchange.com/Programming/Languages/Regular_Expressions/Q_28312994.html


// CREATE AN ARRAY OF TEST DATA
$test_dates_arrays = array
( array( "vdate" => "2013-12-04 00:44:52" )
, array( "vdate" => "2013-12-04 00:45:53" )
, array( "vdate" => "2013-12-04 00:46:58" )
, array( "vdate" => "Yesterday" )
, array( "vdate" => "Gooseball" )
, array( "vdate" => "Tomorrow"  )
, array( "vdate" => "Now"  )
, array( "vdate" => " 2013-12-4     00:44:52"  )
, array( "vdate" => " December 17, 2:38pm"  )
)
;


// DATABASE CONNECTION AND SELECTION VARIABLES - GET THESE FROM YOUR HOSTING COMPANY
$db_host = "localhost"; // PROBABLY THIS IS OK
$db_name = "??";
$db_user = "??";
$db_word = "??";

// OPEN A CONNECTION TO THE DATA BASE SERVER AND SELECT THE DB
$mysqli = new mysqli($db_host, $db_user, $db_word, $db_name);

// DID THE CONNECT/SELECT WORK OR FAIL?
if ($mysqli->connect_errno)
{
    $err
    = "CONNECT FAIL: "
    . $mysqli->connect_errno
    . ' '
    . $mysqli->connect_error
    ;
    trigger_error($err, E_USER_ERROR);
}


// CREATING A TABLE FOR OUR TEST DATA
$sql
=
"
CREATE TEMPORARY TABLE my_table
( id    INT         NOT NULL AUTO_INCREMENT PRIMARY KEY
, vdate VARCHAR(24) NOT NULL DEFAULT ''
)
"
;
if (!$res = $mysqli->query($sql))
{
    $err
    = 'QUERY FAILURE:'
    . ' ERRNO: '
    . $mysqli->errno
    . ' ERROR: '
    . $mysqli->error
    . ' QUERY: '
    . $sql
    ;
    trigger_error($err, E_USER_ERROR);
}


// LOADING OUR DATA INTO THE TABLE
foreach ($test_dates_arrays as $row)
{
    $safe_dt  = $mysqli->real_escape_string($row['vdate']);
    $sql = "INSERT INTO my_table ( vdate ) VALUES ( '$safe_dt' )";
    if (!$res = $mysqli->query($sql))
    {
        $err
        = 'QUERY FAILURE:'
        . ' ERRNO: '
        . $mysqli->errno
        . ' ERROR: '
        . $mysqli->error
        . ' QUERY: '
        . $sql
        ;
        trigger_error($err, E_USER_ERROR);
    }

    // GET THE AUTO_INCREMENT ID OF THE RECORD JUST INSERTED
    $id  = $mysqli->insert_id;
    echo "MySQLI INSERTED A ROW CONTAINING <b>$safe_dt</b> WITH AUTO_INCREMENT ID = $id" . PHP_EOL;
}
echo PHP_EOL;


// ALTER THE TABLE TO ADD THE DATETIME COLUMN
$sql = "ALTER TABLE my_table ADD COLUMN ddate DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00'";
if (!$res = $mysqli->query($sql))
{
    $err
    = 'QUERY FAILURE:'
    . ' ERRNO: '
    . $mysqli->errno
    . ' ERROR: '
    . $mysqli->error
    . ' QUERY: '
    . $sql
    ;
    trigger_error($err, E_USER_ERROR);
}


// VISUALIZE THE TABLE STATUS AFTER "ALTER TABLE"
$sql = "SHOW CREATE TABLE my_table";
if (!$res = $mysqli->query($sql))
{
    $err
    = 'QUERY FAILURE:'
    . ' ERRNO: '
    . $mysqli->errno
    . ' ERROR: '
    . $mysqli->error
    . ' QUERY: '
    . $sql
    ;
    trigger_error($err, E_USER_ERROR);
}
while ($row = $res->fetch_object())
{
    print_r($row);
    echo PHP_EOL;
}
echo PHP_EOL;


// GET THE ROWS THAT HAVE EMPTY ddate VALUES
$sql = "SELECT * FROM my_table WHERE ddate = '0000-00-00 00:00:00' ORDER BY id";
if (!$res = $mysqli->query($sql))
{
    $err
    = 'QUERY FAILURE:'
    . ' ERRNO: '
    . $mysqli->errno
    . ' ERROR: '
    . $mysqli->error
    . ' QUERY: '
    . $sql
    ;
    trigger_error($err, E_USER_ERROR);
}


// ITERATE OVER THE RESULTS SET AS AN OBJECT TO UPDATE THE COLUMNS
while ($row = $res->fetch_object())
{
    // IF THE TIMESTAMP IS OK
    $tst = strtotime($row->vdate);
    if ($tst)
    {
        $new = date('c', $tst);
        $uql = "UPDATE my_table SET ddate = '$new' WHERE id = $row->id LIMIT 1";
        if (!$upd = $mysqli->query($uql))
        {
            $err
            = 'QUERY FAILURE:'
            . ' ERRNO: '
            . $mysqli->errno
            . ' ERROR: '
            . $mysqli->error
            . ' QUERY: '
            . $uql
            ;
            trigger_error($err, E_USER_ERROR);
        }
    }
}
echo PHP_EOL;


// GET ALL THE ROWS TO SHOW WHAT WE HAVE DONE
$sql = "SELECT * FROM my_table ORDER BY id";
if (!$res = $mysqli->query($sql))
{
    $err
    = 'QUERY FAILURE:'
    . ' ERRNO: '
    . $mysqli->errno
    . ' ERROR: '
    . $mysqli->error
    . ' QUERY: '
    . $sql
    ;
    trigger_error($err, E_USER_ERROR);
}
while ($row = $res->fetch_object())
{
    print_r($row);
    echo PHP_EOL;
}








//I added this line because I want to use my table data as test data
$arr=$sql;





// PROCESS EACH DATA ELEMENT
foreach ($arr as $date_time_str)
{
    // DEFAULT IS FAILURE
    $date_format = '0000-00-00 00:00:00';

    // REPAIR WHAT CAN BE REPAIRED
    $date_time_str = str_replace('(', NULL, $date_time_str);
    $date_time_str = str_replace(')', NULL, $date_time_str);
    $date_time_str = str_replace('hr', 'hour', $date_time_str);

    // WITH RELATIVE TIMES, WE HAVE FAILURE
    if ( (FALSE === stripos($date_time_str, 'ago')) && (FALSE === stripos($date_time_str, 'now')) )
    {
        try
        {
            $datetime    = date_create($date_time_str);
            $date_format = date_format($datetime, 'Y-m-d H:i:s');
        }
        catch (Exception $e)
        {
            echo $e->getMessage();
        }
    }
    echo PHP_EOL . "WE GET THIS ISO-STANDARD DATETIME STRING: $date_format FROM $date_time_str";
}

Select allOpen in new window

I am attempting to switch $arr hard coded test data to select my table

Line 340 destroys the $arr array, so this script will probably be pretty useless.  It was meant as a teaching example to show the design of how you might get some of the data/time values into a usable format.  Obviously it will not work for all of them, but it can reduce the amount of manual work that must be done to correct the contents of the data base.  

Do you have a data base table that has these "strange" date/time values?  If so, you can use a SELECT query to get a results set, then you can use while() to iterate over the results set.  Inside the while loop you can generate the ISO-8601 standard date/time value and you can insert this value into the new column that you've added to the table. This is what is going on in line 267-308.

Do you have a data base table that has these "strange" date/time values?

no these are legacy values

If so, you can use a SELECT query to get a results set, then you can use while() to iterate over the results set.  Inside the while loop you can generate the ISO-8601 standard date/time value and you can insert this value into the new column that you've added to the table. This is what is going on in line 267-308.

I do not understand

Are the "legacy values" in a data base table?  If so, please post the CREATE TABLE statement and tell us what column contains the legacy values.  If not, please explain where the legacy values are recorded and where you want to put the standardized values.

a_messages2: dateAgo is varchar (incorrect) and has many legacy values (or bad values: not sure of proper syntax)
here are the values:

'just now'
, 'just now'
, 'just now'
, 'just now'
, '(17 mins ago)'
, '(07/25 11:26)'
, '(07/25 11:20)'
, '(07/25 11:19)'
, '2 days ago'
, '1 week ago'
, '2 weeks ago'
, '(12 hrs ago)'
, '(06/26 12:54)'
, '(07/25 09:58)'
, '(14 hrs ago)'
, '(07/25 11:01)'
, '(07/25 10:59)'
, '(07/25 10:24)'
, '(07/25 10:23)'
, '(07/25 09:48)'
, '(16 hrs ago)'
, '(20 hrs ago)'
, '(21 hrs ago)'
, '(07/25 22:27)'
, '(07/25 09:43)'
, '(07/26 12:44)'
, '(07/26 12:17)'
, '(07/26 11:06)'
, '(07/26 07:07)'
, '(07/24 17:47)'
, '(07/24 10:45)'
, '(07/24 08:31)'
, '(07/23 06:47)'
, '(07/23 06:35)'
, '(07/23 06:34)'
, '4 days ago'
, '5 days ago'
, '6 days ago'
, '3 weeks ago'
, '1 month ago'
, '3 days ago'
, '1 day ago'
, '(11 mins ago)'
, '(21 mins ago)'
, '(25 mins ago)'
, '(15 mins ago)'
, '(19 mins ago)'
, '(16 mins ago)'
, '(18 mins ago)'
, '(20 mins ago)'
, '(08/06 19:48)'
, '(22 mins ago)'
, '(23 mins ago)'
, '(24 mins ago)'
, '(26 mins ago)'
, '(27 mins ago)'
, '(08/07 06:06)'
, '(08/06 23:33)'
, '(08/06 20:27)'
, '(08/06 18:08)'
, '(08/06 14:42)'
, '(08/06 14:41)'
, '(08/06 10:14)'
, '(08/05 15:42)'
, '(08/05 15:33)'
, '(08/01 10:11)'
, '(08/04 05:57)'
, '(08/04 04:21)'
, '(08/03 17:08)'
, '(08/03 16:40)'
, '(08/01 10:15)'
, '(10 mins ago)'
, '(13 mins ago)'
, '(14 mins ago)'
, '(42 mins ago)'
, '(1 hr ago)'
, '(22 hrs ago)'
, '(08/07 07:37)'
, '(08/07 07:32)'
, '(08/07 07:29)'
, '(08/07 07:20)'
, '(11 hrs ago)'
, '(7 hrs ago)'
, '(08/05 16:57)'
, '(08/05 13:59)'
, '(08/05 12:34)'
, '(08/05 10:49)'
, '(08/04 15:49)'
, '(08/04 13:02)'
, '(08/04 12:12)'
, '(08/04 11:55)'
, '(08/04 04:48)'
, '(08/04 13:08)'
, '(08/04 12:11)'
, '(08/04 12:08)'
, '(08/04 02:31)'
, '(08/04 15:59)'
, '(08/04 15:58)'
, '(8 hrs ago)'
, '(9 hrs ago)'
, '(10 hrs ago)'
, '(09/03 11:45)'
, '2013-10-23 14:08:00'
, '2013-10-23 14:04:00'
, '2013-10-23 13:54:00'
, '2013-10-23 13:35:00'
, '2013-10-22 12:37:00'
, '2013-10-22 10:31:00'
, '2013-11-30 08:31:00'

Select allOpen in new window

a_messages2

CREATE TABLE `a_messages2` (
  `a_messages_id` int(11) NOT NULL auto_increment,
  `conversation_id` bigint(20) default NULL,
  `profile_id` varchar(20) default NULL,
  `sender` varchar(20) default NULL,
  `message_id` bigint(20) default NULL,
  `message_text` varchar(1000) default NULL,
  `dateAgo` varchar(20) default NULL,
  `message_read` tinyint(4) default NULL,
  `this_user` varchar(20) default NULL,
  PRIMARY KEY  (`a_messages_id`),
  UNIQUE KEY `unique_message_id` (`message_id`)
) ENGINE=MyISAM AUTO_INCREMENT=9969 DEFAULT CHARSET=utf8;

Select allOpen in new window

the only column of that is different is dateAgo
a_messages: dateAgo is datetime (correct)

CREATE TABLE `a_messages` ( `a_messages_id` int(11) NOT NULL auto_increment, `conversation_id` bigint(20) default NULL, `profile_id` varchar(20) default NULL, `sender` varchar(20) default NULL, `message_id` bigint(20) default NULL, `message_text` varchar(1000) default NULL, `dateAgo` datetime default NULL, `message_read` tinyint(4) default NULL, `this_user` varchar(20) default NULL, PRIMARY KEY (`a_messages_id`), UNIQUE KEY `unique_message_id` (`message_id`) ) ENGINE=MyISAM AUTO_INCREMENT=254 DEFAULT CHARSET=utf8;

Select allOpen in new window

I checked the code before I decided to run

a_messages is the production table, the column dateAgo is correct datetime and every field has a datetime value

the table a_messages2 (which is not in your code) are the older values which I which to insert into a_messages
dateAgo was varchar and there were many different types of false values

Yes, I understand about dateAgo values.  "Just now" and many of the others are meaningless because there is no date/time context.  This is the sort of thing that has to be handled manually.

Anyway, I hope the concept is clear in the example.  I tested the code and it did what was expected.  Best regards, ~Ray

stdClass Object ( [a_messages_id] => 1 [dateAgo] => just now [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 2 [dateAgo] => just now [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 3 [dateAgo] => just now [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 4 [dateAgo] => just now [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 5 [dateAgo] => (17 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 6 [dateAgo] => (07/25 11:26) [validDateAgo] => 2014-07-25 11:26:00 ) 
stdClass Object ( [a_messages_id] => 7 [dateAgo] => (07/25 11:20) [validDateAgo] => 2014-07-25 11:20:00 ) 
stdClass Object ( [a_messages_id] => 8 [dateAgo] => (07/25 11:19) [validDateAgo] => 2014-07-25 11:19:00 ) 
stdClass Object ( [a_messages_id] => 9 [dateAgo] => 2 days ago [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 10 [dateAgo] => 1 week ago [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 11 [dateAgo] => 2 weeks ago [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 12 [dateAgo] => (12 hrs ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 13 [dateAgo] => (06/26 12:54) [validDateAgo] => 2014-06-26 12:54:00 ) 
stdClass Object ( [a_messages_id] => 14 [dateAgo] => (07/25 09:58) [validDateAgo] => 2014-07-25 09:58:00 ) 
stdClass Object ( [a_messages_id] => 15 [dateAgo] => (14 hrs ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 16 [dateAgo] => (07/25 11:01) [validDateAgo] => 2014-07-25 11:01:00 ) 
stdClass Object ( [a_messages_id] => 17 [dateAgo] => (07/25 10:59) [validDateAgo] => 2014-07-25 10:59:00 ) 
stdClass Object ( [a_messages_id] => 18 [dateAgo] => (07/25 10:24) [validDateAgo] => 2014-07-25 10:24:00 ) 
stdClass Object ( [a_messages_id] => 19 [dateAgo] => (07/25 10:23) [validDateAgo] => 2014-07-25 10:23:00 ) 
stdClass Object ( [a_messages_id] => 20 [dateAgo] => (07/25 09:48) [validDateAgo] => 2014-07-25 09:48:00 ) 
stdClass Object ( [a_messages_id] => 21 [dateAgo] => (16 hrs ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 22 [dateAgo] => (20 hrs ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 23 [dateAgo] => (21 hrs ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 24 [dateAgo] => (07/25 22:27) [validDateAgo] => 2014-07-25 22:27:00 ) 
stdClass Object ( [a_messages_id] => 25 [dateAgo] => (07/25 09:43) [validDateAgo] => 2014-07-25 09:43:00 ) 
stdClass Object ( [a_messages_id] => 26 [dateAgo] => (07/26 12:44) [validDateAgo] => 2014-07-26 12:44:00 ) 
stdClass Object ( [a_messages_id] => 27 [dateAgo] => (07/26 12:17) [validDateAgo] => 2014-07-26 12:17:00 ) 
stdClass Object ( [a_messages_id] => 28 [dateAgo] => (07/26 11:06) [validDateAgo] => 2014-07-26 11:06:00 ) 
stdClass Object ( [a_messages_id] => 29 [dateAgo] => (07/26 07:07) [validDateAgo] => 2014-07-26 07:07:00 ) 
stdClass Object ( [a_messages_id] => 30 [dateAgo] => (07/24 17:47) [validDateAgo] => 2014-07-24 17:47:00 ) 
stdClass Object ( [a_messages_id] => 31 [dateAgo] => (07/24 10:45) [validDateAgo] => 2014-07-24 10:45:00 ) 
stdClass Object ( [a_messages_id] => 32 [dateAgo] => (07/24 08:31) [validDateAgo] => 2014-07-24 08:31:00 ) 
stdClass Object ( [a_messages_id] => 33 [dateAgo] => (07/23 06:47) [validDateAgo] => 2014-07-23 06:47:00 ) 
stdClass Object ( [a_messages_id] => 34 [dateAgo] => (07/23 06:35) [validDateAgo] => 2014-07-23 06:35:00 ) 
stdClass Object ( [a_messages_id] => 35 [dateAgo] => (07/23 06:34) [validDateAgo] => 2014-07-23 06:34:00 ) 
stdClass Object ( [a_messages_id] => 36 [dateAgo] => 4 days ago [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 37 [dateAgo] => 5 days ago [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 38 [dateAgo] => 6 days ago [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 39 [dateAgo] => 3 weeks ago [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 40 [dateAgo] => 1 month ago [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 41 [dateAgo] => 3 days ago [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 42 [dateAgo] => 1 day ago [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 43 [dateAgo] => (11 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 44 [dateAgo] => (21 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 45 [dateAgo] => (25 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 46 [dateAgo] => (15 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 47 [dateAgo] => (19 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 48 [dateAgo] => (16 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 49 [dateAgo] => (18 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 50 [dateAgo] => (20 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 51 [dateAgo] => (08/06 19:48) [validDateAgo] => 2014-08-06 19:48:00 ) 
stdClass Object ( [a_messages_id] => 52 [dateAgo] => (22 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 53 [dateAgo] => (23 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 54 [dateAgo] => (24 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 55 [dateAgo] => (26 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 56 [dateAgo] => (27 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 57 [dateAgo] => (08/07 06:06) [validDateAgo] => 2014-08-07 06:06:00 ) 
stdClass Object ( [a_messages_id] => 58 [dateAgo] => (08/06 23:33) [validDateAgo] => 2014-08-06 23:33:00 ) 
stdClass Object ( [a_messages_id] => 59 [dateAgo] => (08/06 20:27) [validDateAgo] => 2014-08-06 20:27:00 ) 
stdClass Object ( [a_messages_id] => 60 [dateAgo] => (08/06 18:08) [validDateAgo] => 2014-08-06 18:08:00 ) 
stdClass Object ( [a_messages_id] => 61 [dateAgo] => (08/06 14:42) [validDateAgo] => 2014-08-06 14:42:00 ) 
stdClass Object ( [a_messages_id] => 62 [dateAgo] => (08/06 14:41) [validDateAgo] => 2014-08-06 14:41:00 ) 
stdClass Object ( [a_messages_id] => 63 [dateAgo] => (08/06 10:14) [validDateAgo] => 2014-08-06 10:14:00 ) 
stdClass Object ( [a_messages_id] => 64 [dateAgo] => (08/05 15:42) [validDateAgo] => 2014-08-05 15:42:00 ) 
stdClass Object ( [a_messages_id] => 65 [dateAgo] => (08/05 15:33) [validDateAgo] => 2014-08-05 15:33:00 ) 
stdClass Object ( [a_messages_id] => 66 [dateAgo] => (08/01 10:11) [validDateAgo] => 2014-08-01 10:11:00 ) 
stdClass Object ( [a_messages_id] => 67 [dateAgo] => (08/04 05:57) [validDateAgo] => 2014-08-04 05:57:00 ) 
stdClass Object ( [a_messages_id] => 68 [dateAgo] => (08/04 04:21) [validDateAgo] => 2014-08-04 04:21:00 ) 
stdClass Object ( [a_messages_id] => 69 [dateAgo] => (08/03 17:08) [validDateAgo] => 2014-08-03 17:08:00 ) 
stdClass Object ( [a_messages_id] => 70 [dateAgo] => (08/03 16:40) [validDateAgo] => 2014-08-03 16:40:00 ) 
stdClass Object ( [a_messages_id] => 71 [dateAgo] => (08/01 10:15) [validDateAgo] => 2014-08-01 10:15:00 ) 
stdClass Object ( [a_messages_id] => 72 [dateAgo] => (10 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 73 [dateAgo] => (13 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 74 [dateAgo] => (14 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 75 [dateAgo] => (42 mins ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 76 [dateAgo] => (1 hr ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 77 [dateAgo] => (22 hrs ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 78 [dateAgo] => (08/07 07:37) [validDateAgo] => 2014-08-07 07:37:00 ) 
stdClass Object ( [a_messages_id] => 79 [dateAgo] => (08/07 07:32) [validDateAgo] => 2014-08-07 07:32:00 ) 
stdClass Object ( [a_messages_id] => 80 [dateAgo] => (08/07 07:29) [validDateAgo] => 2014-08-07 07:29:00 ) 
stdClass Object ( [a_messages_id] => 81 [dateAgo] => (08/07 07:20) [validDateAgo] => 2014-08-07 07:20:00 ) 
stdClass Object ( [a_messages_id] => 82 [dateAgo] => (11 hrs ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 83 [dateAgo] => (7 hrs ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 84 [dateAgo] => (08/05 16:57) [validDateAgo] => 2014-08-05 16:57:00 ) 
stdClass Object ( [a_messages_id] => 85 [dateAgo] => (08/05 13:59) [validDateAgo] => 2014-08-05 13:59:00 ) 
stdClass Object ( [a_messages_id] => 86 [dateAgo] => (08/05 12:34) [validDateAgo] => 2014-08-05 12:34:00 ) 
stdClass Object ( [a_messages_id] => 87 [dateAgo] => (08/05 10:49) [validDateAgo] => 2014-08-05 10:49:00 ) 
stdClass Object ( [a_messages_id] => 88 [dateAgo] => (08/04 15:49) [validDateAgo] => 2014-08-04 15:49:00 ) 
stdClass Object ( [a_messages_id] => 89 [dateAgo] => (08/04 13:02) [validDateAgo] => 2014-08-04 13:02:00 ) 
stdClass Object ( [a_messages_id] => 90 [dateAgo] => (08/04 12:12) [validDateAgo] => 2014-08-04 12:12:00 ) 
stdClass Object ( [a_messages_id] => 91 [dateAgo] => (08/04 11:55) [validDateAgo] => 2014-08-04 11:55:00 ) 
stdClass Object ( [a_messages_id] => 92 [dateAgo] => (08/04 04:48) [validDateAgo] => 2014-08-04 04:48:00 ) 
stdClass Object ( [a_messages_id] => 93 [dateAgo] => (08/04 13:08) [validDateAgo] => 2014-08-04 13:08:00 ) 
stdClass Object ( [a_messages_id] => 94 [dateAgo] => (08/04 12:11) [validDateAgo] => 2014-08-04 12:11:00 ) 
stdClass Object ( [a_messages_id] => 95 [dateAgo] => (08/04 12:08) [validDateAgo] => 2014-08-04 12:08:00 ) 
stdClass Object ( [a_messages_id] => 96 [dateAgo] => (08/04 02:31) [validDateAgo] => 2014-08-04 02:31:00 ) 
stdClass Object ( [a_messages_id] => 97 [dateAgo] => (08/04 15:59) [validDateAgo] => 2014-08-04 15:59:00 ) 
stdClass Object ( [a_messages_id] => 98 [dateAgo] => (08/04 15:58) [validDateAgo] => 2014-08-04 15:58:00 ) 
stdClass Object ( [a_messages_id] => 99 [dateAgo] => (8 hrs ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 100 [dateAgo] => (9 hrs ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 101 [dateAgo] => (10 hrs ago) [validDateAgo] => 0000-00-00 00:00:00 ) 
stdClass Object ( [a_messages_id] => 102 [dateAgo] => (09/03 11:45) [validDateAgo] => 2014-09-03 11:45:00 ) 
stdClass Object ( [a_messages_id] => 103 [dateAgo] => 2013-10-23 14:08:00 [validDateAgo] => 2013-10-23 14:08:00 ) 
stdClass Object ( [a_messages_id] => 104 [dateAgo] => 2013-10-23 14:04:00 [validDateAgo] => 2013-10-23 14:04:00 ) 
stdClass Object ( [a_messages_id] => 105 [dateAgo] => 2013-10-23 13:54:00 [validDateAgo] => 2013-10-23 13:54:00 ) 
stdClass Object ( [a_messages_id] => 106 [dateAgo] => 2013-10-23 13:35:00 [validDateAgo] => 2013-10-23 13:35:00 ) 
stdClass Object ( [a_messages_id] => 107 [dateAgo] => 2013-10-22 12:37:00 [validDateAgo] => 2013-10-22 12:37:00 ) 
stdClass Object ( [a_messages_id] => 108 [dateAgo] => 2013-10-22 10:31:00 [validDateAgo] => 2013-10-22 10:31:00 ) 
stdClass Object ( [a_messages_id] => 109 [dateAgo] => 2013-11-30 08:31:00 [validDateAgo] => 2013-11-30 08:31:00 ) 

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This is the output

I think a_messages2 is the table that needs to be edited because it has the varchar dateAgo

I do not notice any changes in the a_messages table (but I think this table is correct anyway)

should I show other data for scee?

Can this question be broken down into smaller questions.

works for me if the test data ('1 week ago, date incorrect format) is coming the file and not the mysql table