how to insert the value of current primary key of parent table into child table

Question

i have two table employee table(parent table) and employee_image table(child table).

employee table (employee_id is auto increment primary key in this parent table)

|=============================|
|employee_id    employee_name |
|  1             ram          |
|  2             sham         |
|  3             dany         |
|  4             james        |
|=============================|

employee_image table (after inserting values table should look like something this)

|=====================================================|
|image_id      name       image           employee_id |
|  1           img_one   [BLOB-22.3KiB]     2         |
|  2           img_two   [BLOB-24.5KiB]     3         |
|  3           img_three [BLOB-32.2KiB]     3         |
|  4           img_four  [BLOB-18.6KiB]     3         |
|  5           img_five  [BLOB-17.7KiB]     4         |
|=====================================================|

On first insert.php form i am using this script

<html>
<head>
<title>
</title>
</head>
<body>
<form action="commit.php" method="post" enctype="multipart/form-data">
<table>
<tr><td>employee name : </td><td><input type ="text" name ="employee_name"/></td></tr>
<tr><td>upload image 1 : </td><td><input type="file" name="image"></td></tr>
<tr><td>upload image 2 : </td><td><input type="file" name="image"></td></tr>
<tr><td>upload image 3 : </td><td><input type="file" name="image"></td></tr>
<tr><td><input type ="submit" name="submit" value ="submit"/></td></tr>
</table>
</body>
</html>

and in second page "commit.php" i am using this script

<?php
$db=mysql_connect('localhost', 'root', '') or 
die ('Unable to connect. Check your connection paramerters.');

mysql_select_db('my_db', $db) or die(mysql_error($db));


$query ='INSERT INTO employee_tbl
(employee_name)
VALUES
("' . $_POST['employee_name'] . '")';
mysql_query($query, $db) or die(mysql_error($db));
echo 'employee name inserted succecfully!';

$imageName=mysql_real_escape_string($_FILES["image"]["name"]);
$imageData=mysql_real_escape_string(file_get_contents($_FILES["image"]["tmp_name"]));
$imageType=mysql_real_escape_string($_FILES["image"]["type"]);

if(substr($imageType,0,5) == "image") 
{
mysql_query("insert into test_image values ('', '$imageName', '$imageData')");
echo "image uploaded";
}
else
{
 echo "only images are allowed";
}
}
?>

Here employee_id is primary key in employee table (parent table). I want to insert one or two or three images simultaneously. My aim is to insert the current inserting employee_id in employee_image table (child table) also... how can i do this? Thank you for helping me.

Answer 1

Replace this

mysql_query("insert into test_image values ('', '$imageName', '$imageData')");

With:

$id = mysql_insert_id();
mysql_query("insert into test_image values ('', '$imageName', '$imageData','$id')");

Answer 2

You can get the last inserted auto increment PK value by two ways -

by using MySQL command SELECT LAST_INSERT_ID() Reference:
by using PHP mysqli_insert_id() function Reference:

For the method 1. , you can use SELECT last_insert_id() in MySQL and the query will return the last inserted ID

For the method 2. you can use mysqli_insert_id() function

Here is the example of method 2. * mysqli_* functions are used in the following example *

$link = mysqli_connect("localhost", "root", "", "my_db") 
or die(mysqli_error());

$query ='INSERT INTO employee_tbl
(employee_name)
VALUES
("' . $_POST['employee_name'] . '")';

mysqli_query($link, $query) or die(mysqli_error());
echo 'employee name inserted succecfully!';

$imageName=mysqli_real_escape_string($link, $_FILES["image"]["name"]);
$imageData=mysqli_real_escape_string($link, file_get_contents($_FILES["image"]["tmp_name"]));
$imageType=mysqli_real_escape_string($link, $_FILES["image"]["type"]);

if(substr($imageType,0,5) == "image") 
{
    $id = mysqli_insert_id($link);
    mysqli_query($link, "insert into test_image values ('', '$imageName', '$imageData', '$id')");
    echo "image uploaded";
}
else
{
    echo "only images are allowed";
}

how to insert the value of current primary key of parent table into child table

Question

employee table (employee_id is auto increment primary key in this parent table)

employee_image table (after inserting values table should look like something this)

Here employee_id is primary key in employee table (parent table). I want to insert one or two or three images simultaneously. My aim is to insert the current inserting employee_id in employee_image table (child table) also... how can i do this? Thank you for helping me.

2 answers

solution1
2 ACCPTED 2014-02-21 16:47:34

solution2
0 2014-02-21 17:25:04

how to insert the value of current primary key of parent table into child table

Question

employee table (employee_id is auto increment primary key in this parent table)

employee_image table (after inserting values table should look like something this)

Here employee_id is primary key in employee table (parent table). I want to insert one or two or three images simultaneously. My aim is to insert the current inserting employee_id in employee_image table (child table) also... how can i do this? Thank you for helping me.

2 answers

solution1 2 ACCPTED 2014-02-21 16:47:34

solution2 0 2014-02-21 17:25:04

solution1
2 ACCPTED 2014-02-21 16:47:34

solution2
0 2014-02-21 17:25:04