update multiple author in php but not same value - php

Question

I want to update multiple authors but when i click the update button it saves last inputted value on all of the fields. Your response is highly appreciated. Thank you so much!!!
Here is my code
<?php
}elseif($ID[0]=="Update"){
$Author_Query = mysql_query("SELECT a.*, b.* FROM tblAuthor a, tblResources b WHERE a.Accession_No = b.Accession_No AND a.Accession_No = '".$ID[1]."'");
while($Author = mysql_fetch_array($Author_Query)){
?>
<td><input type="text" name="Author[]" value="<?php echo $_POST['Author']; ?><?php echo $Author['Author']; ?>" /></td>
<?php }} ?>
Update button code
if($_POST['Update'] == "Update"){
$Ac1 = $_POST['Accession1'];
$Ac2 = $_POST['Accession2'];
do{
mysql_query("UPDATE tblResources SET
Accession_No = '".$Ac1."',
Month = '".$_POST['Month']."',
Day = '".$_POST['Day']."',
RYear = '".$_POST['RYear']."',
Class = '".$_POST['Class']."',
Title = '".$_POST['Title']."',
Edition = '".$_POST['Edition']."',
Volumes = '".$_POST['Volumes']."',
Pages = '".$_POST['Pages']."',
Source_of_Fund = '".$_POST['Source_of_Fund']."',
Cost_Price = '".$_POST['Cost_Price']."',
Publisher = '".$_POST['Publisher']."',
Year = '".$_POST['Year']."',
Remarks = '".$_POST['Remarks']."',
Category_ID = '".$_POST['Category']."',
Type_ID = '".$_POST['ResType']."',
Copies = '1',
Availability = '".$_POST['Availability']."',
Tag = 'Title',
Year_Level = '".$_POST['Year_Level']."'
WHERE
Accession_No = '".$Ac1."'");
//$q = $Text."/";
//$gets = explode("/",$q);
$Get = $_POST['Author'];
$Box = count($Get);
for($Text = 0; $Text < $Box; $Text++){
$TextBox = $Get[$Text];
mysql_query("UPDATE tblAuthor
SET Author = '".$TextBox."'
WHERE Accession_No = '".$Ac1."'");
}
$Ac1++;
}while($Ac1 <= $Ac2);
echo "<script language=javascript>
alert('Successfully Updated!');
location.href='Resources.php';
</script>";
}

Answer 1

The problem happen because field 'Accession_No' it's same for author, so the effective update always the last one.
I think something like this solve your problem:
$Get = $_POST['Author'];
$Box = count($Get);
if($Box > 0) {
mysql_query("DELETE FROM tblAuthor WHERE Accession_No = '".$Ac1."'");
foreach($Get as $author){
mysql_query("INSERT INTO tblAuthor (Author, Accession_No) VALUES ('".$author."', ".$Ac1.");
}
}
It's necessary remove the author, because if one author isn't in table before, the mysql not update, the record doesn't exists. So, it's easy remove all authors and insert again.