Store array in MySQL using PHP one by one

Question

Ii have stored an array list using

<?php
$array = array("foo", "bar", "hello", "world");
include("mydb.php");
$array_string=mysql_escape_string(serialize($array));
mysql_query("insert into tsest (array) values('$array_string')",$con) or die("not updated");
?>

now i want to update that field with a new array but don't delete previeus one i used

   <?php
$array = array("aaa");
include("mydb.php");
$array_string=mysql_escape_string(serialize($array));

$sql= 'select * from tsest where uname = "manoj" ';    
    $result = mysql_query($sql,$con);
    $row = mysql_fetch_array($result);  
$value=$row['array'];
mysql_query('UPDATE tsest SET array="'.$array_string.'"'.$value.' where uname="manoj"',$con) or die("hello");

?>

but it didn't work

Answer 1

You have serialized your array before you store it, but you need to unserialize before you can add to it.

$value=unserialize($row['array']);

You also need to merge the arrays, doing a $array_string.'"'.$value will not work.

Try this:

$newArray = mysql_escape_string(serialize(array_merge($value, $array_string)));
mysql_query('UPDATE tsest SET array="'.$newArray.' where uname="manoj"',$con) or die("hello");

Answer 2

When you save the array like this

mysql_query("insert into tsest (array) values('$array_string')",$con) or die("not updated");

Then you are not saving a username along with this data. However when you are trying to fetch it you are using a username

$sql= 'select * from tsest where uname = "manoj" '; 

Same for update. Hence the update doesn't work because your array was not saved for a username manoj

So Therefore when you save the array you have to also save the username in your table

Answer 3

there is some error with your update sql and serialized value can not be simply joined to produce a new array try code below

   <?php

   $array = array("aaa"); include("mydb.php"); $sql= 'select * from
   tsest where uname = "manoj" ';

------------------------------------------------------------------------

   $result = mysql_query($sql,$con); $row = mysql_fetch_array($result); 
   $value=$row['array']; $new_array = array_merge($array,
   unserialize($value)); array_string =
   mysql_escape_string(serialize($new_array)); mysql_query('UPDATE tsest
   SET array="'.$array_string.'"'.' where uname="manoj"',$con) or
   die("hello");

?>