Database connectivity in PHP

PHP Tutorials By Vineet Kumar Saini

Database Connectivity in PHP

This article explains how to insert and select data from a database into a HTML table in PHP.
Using an insert statement you can insert data into a database. Using a select statement you
can select the entire data from a database into a HTML table.

First of all we will create a database.

Create The Database

<html>
<body bgcolor="pink">
<center>
<?php
$con = mysql_connect ("localhost","root","");
$db="MCN";
if (!$con)
{
die ('Could not connect: ' . mysql_error());
}
if (mysql_query ("CREATE DATABASE $db",$con))
{
echo "Your Database Created Which Name is : $db";
}
else
{
echo "Error creating database: " . mysql_error();
}
mysql_close ($con);
?>
</center>
}</body>
</html>

Output

In the above code, we created a database named MCN. Now we will create a table in the
MCN database.

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Create The Table

<html>
<center>
<?php
$con = mysql_connect ("localhost","root","");
if (!$con)
{
die ('Could not connect: ' . mysql_error());
}
mysql_select_db ("MCN", $con);
$sql = "CREATE TABLE EMPLOYEE
(
Name varchar(50),
Designation varchar(50),
Sal int,
Qualification varchar(50)
)";
mysql_query($sql,$con);
echo "Your table created which is as follows";
mysql_close($con);
?>
<table bgcolor="skyblue" border="2">
<tr>
<td colspan=2 align="center">Employee Table</td>
</tr>
<td>Name</td><td><input type="text" name="txt1"></td>
</tr>
<tr>
<td>Designation</td><td><input type="text" name="txt2"></td>
</tr>
<tr>
<td>Sal</td><td><input type="text" name="txt3"></td>
</tr>



<tr>
<td>Qualification</td><td><input type="text" name="txt4"></td>
</tr>
</table>
</center>
</body>
</html>

Output

In the above code we created a table named employee. There are four fields in the
employee table i.e. name, designation, sal, qualification.

Insert Data in Table

Now we will write the code to insert data into the database table. The code for inserting
data into the database table is as follows:

<?php
$con=mysql_connect ("localhost","root","");
mysql_select_db("mcn",$con);
@$a=$_POST['txt1'];
@$b=$_POST['txt2'];
@$c=$_POST['txt3'];
@$d=$_POST['txt4'];
if(@$_POST['inser'])
{
$s="insert into employee values ('$a','$b','$c','$d')";
echo "Your Data Inserted";
mysql_query ($s);
}
$con=mysql_connect ("localhost","root","");
mysql_select_db ("mcn",$con);
if(@$_POST ['sel'])



{
echo $ins=mysql_query ("select * from employee");
echo "<table bgcolor=skyblue border='2'>
<tr>
<th colspan=4>Select Data From Employee Table</th></tr>
<tr>
<th>Nmae</th>
<th>Designation</th>
<th>Sal</th>
<th>Qualification</th>
</tr>";
while ($row=mysql_fetch_array ($ins))
{
echo "<tr>";
echo "<th>".$row ['Name']."</th>";
echo "<th>". $row ['Designation']. "</th>";
echo "<th>". $row ['Sal']."</th>";
echo "<th>". $row ['Qualification']."</th>";
echo "</tr>";
}
}
echo "</table>"
?>
<html>
<head>
</head>
<table bgcolor="skyblue" border="2">
<form method="post">
<tr>
<td colspan=2 align="center">Employee Table</td>
</tr>
<td>Name</td><td><input type="text" name="txt1"></td>
</tr>
<tr>
<td>Designation</td><td><input type="text" name="txt2"></td>
</tr>
<tr>
<td>Sal</td><td><input type="text" name="txt3"></td>
</tr>
<tr>
<td>Qualification</td><td><input type="text" name="txt4"></td>
</tr>
<tr>
<td><input type="submit" name="inser" value="Insert"></td>
<td><input type="submit" name="sel" value="Select"></td>
</tr>
</form>
</table>
</body>
</html

Output



Now we will insert the data into a HTML table then click on the insert button.

When you click on the insert button then your data will be inserted in the database table.
Like as in the following image.

Select Data From Database

If you want to select all data from the database into the HTML table then you can do that.
For this purpose you will be click on the select button. When you click on the select button
then your data will be displayed in the HTML table, such as in the following image:



Conclusion

So in this article you saw, how to insert and select data from a database into a HTML table.
Using this article one can easily understand insert and select data from database in to HTML
table.


Database connectivity in PHP

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