Photo Upload and Retrive with MySql using BLOB in PHP
Creating a table to store the image in terms of bytes.
Create Database with specific table as
>>create database image;
>>create table storeimages(id int not null auto increment,primary key(id),name varchar(50) , image longblob , size int );

Output
--------
>>Table Created Successfully



HTML and CSS is added with PHP
Store File in a name : UploadPhoto.php 
<html>
<head><title>Upload - photo</title>
<style>
.up_pho
{
border:1px solid #BEBEBE;
margin:50px 400px 40px 40px;
padding:10px 10px 10px 10px;

}

</style>
</head>
<body>
<div class=up_pho ><?php
$rollno = rollno;
?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method=post enctype="multipart/form-data" >
<input type=hidden name="MAX_FILE_SIZE" value="1000000" />
<input type=submit value=submit />
</form>
<?php

// Checking the file was submitted
if(!isset($_FILES['userfile'])) {   echo '<p>Please Select a file</p>';   }

else
{     try  {
              $msg = upload(); // function  calling to upload an image
              echo $msg;
              }
           catch(Exception $e) {   
               echo $e->getMessage();
               echo 'Sorry, Could not upload file';
                    }
}


function upload() {
    include "database/dbco.php";
    $maxsize = 10000000; //set to approx 10 MB

    //check associated error code
    if($_FILES['userfile']['error']==UPLOAD_ERR_OK) {

        //check whether file is uploaded with HTTP POST
        if(is_uploaded_file($_FILES['userfile']['tmp_name'])) {    

            //checks size of uploaded image on server side
            if( $_FILES['userfile']['size'] < $maxsize) {    

                $finfo = finfo_open(FILEINFO_MIME_TYPE);

                //checks whether uploaded file is of image type
                if(strpos(finfo_file($finfo, $_FILES['userfile']['tmp_name']),"image")===0) {    

                    // prepare the image for insertion
                    $imgData =addslashes (file_get_contents($_FILES['userfile']['tmp_name']));

                    // put the image in the db...
                    // database connection
            $host = '127.0.0.1';
            $user = 'root';
            $pass = 'your_password';
            $db = 'database_name';

                    mysql_connect($host, $user, $pass) OR DIE (mysql_error());

                    // select the db
                    mysql_select_db ($db) OR DIE ("Unable to select db".mysql_error());

                    // our sql query

        
                    $sql = "INSERT INTO storeimages
                    (id,image, name,size)
                    VALUES
                    ('$_POST[id]','{$imgData}', '{$_FILES['userfile']['name']}','{$_FILES['userfile']['size']}');";
                                mysql_query($sql) or die("Error in Query insert: " . mysql_error());
    
                    // insert the image

                    $msg='<p>Image successfully saved in database . </p>';
                }
                else
                    $msg="<p>Uploaded file is not an image.</p>";
            }
             else {
                // if the file is not less than the maximum allowed, print an error
                $msg='<div>File exceeds the Maximum File limit</div>
                <div>Maximum File limit is '.$maxsize.' bytes</div>
                <div>File '.$_FILES['userfile']['name'].' is '.$_FILES['userfile']['size'].
                ' bytes</div><hr />';
                }
        }
        else
            $msg="File not uploaded successfully.";

    }
    else {
        $msg= file_upload_error_message($_FILES['userfile']['error']);
    }
    return $msg;
}

// Function to return error message based on error code

function file_upload_error_message($error_code) {
    switch ($error_code) {
        case UPLOAD_ERR_INI_SIZE:
            return 'The uploaded file exceeds the upload_max_filesize directive in php.ini';
        case UPLOAD_ERR_FORM_SIZE:
            return 'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form';
        case UPLOAD_ERR_PARTIAL:
            return 'The uploaded file was only partially uploaded';
        case UPLOAD_ERR_NO_FILE:
            return 'No file was uploaded';
        case UPLOAD_ERR_NO_TMP_DIR:
            return 'Missing a temporary folder';
        case UPLOAD_ERR_CANT_WRITE:
            return 'Failed to write file to disk';
        case UPLOAD_ERR_EXTENSION:
            return 'File upload stopped by extension';
        default:
            return 'Unknown upload error';
    }
}
?>
</div>

</body>
</html>   





<?php

// Store File in a name : DisplayPhoto.php 

$host = '127.0.0.1';
$user = 'root';
$pass = 'your_password';
$db = 'database_name';

 // some basic sanity checks
 if(isset($_GET['id']) && is_numeric($_GET['id'])) {
     //connect to the db
     $link = mysql_connect("$host", "$user", "$pass")
     or die("Could not connect: " . mysql_error());

     // select our database
     mysql_select_db("$db") or die(mysql_error());

     // get the image from the db
     $sql = "SELECT image FROM storeimages WHERE id=" .$_GET['id'] . ";";

     // the result of the query
     $result = mysql_query("$sql") or die("Invalid query: " . mysql_error());

     // set the header for the image
     header("Content-type: image/jpeg");
     echo mysql_result($result, 0);

     // close the db link
     mysql_close($link);
 }
 else {
     echo 'Please use a real id number';
 }
?>