my code cannot send all image data.
it sends odd or even no of data.please help
<?php
session_start();
include("dbcon.php");
if (isset($_POST['submit'])) {
$j = 0; //Variable for indexing uploaded image
$a=0;
$target_path = "uploads/"; //Declaring Path for uploaded images
if (count($_FILES['file']['name'])<6)
{
$k=count($_FILES['file']['name']);
}
else
{
$k=6;
}
for ($i = 0; $i < $k; $i++) {//loop to get individual element from the array count($_FILES['file']['name'])
$validextensions = array("jpeg", "jpg", "png"); //Extensions which are allowed
$ext = explode('.', basename($_FILES['file']['name'][$i]));//explode file name from dot(.)
$file_extension = end($ext); //store extensions in the variable
$target_path = $target_path . md5(uniqid()) . "." . $ext[count($ext) - 1];//set the target path with a new name of image
$img='image'.$a;
$id=$_SESSION['id'];
$sql="UPDATE ads SET $img='$target_path' WHERE id='$id'";
echo $img;
$a=$a+1;
$j = $j + 1;//increment the number of uploaded images according to the files in array
if (($_FILES["file"]["size"][$i] < 500000) //Approx. 500kb files can be uploaded.
&& in_array($file_extension, $validextensions)) {
if (move_uploaded_file($_FILES['file']['tmp_name'][$i], $target_path)) {//if file moved to uploads folder
echo $j. ').<span id="noerror">Image uploaded successfully!.</span><br/><br/>';
} else {//if file was not moved.
echo $j. ').<span id="error">please try again!.</span><br/><br/>';
}
} else {//if file size and file type was incorrect.
echo $j. ').<span id="error">***Invalid file Size or Type***</span><br/><br/>';
}
}
if (!mysql_query($sql,$con))
{
die('Error: ' . mysql_error());
}
mysql_close($con);
}
?>