How to Upload and Validate an Image File in PHP

In this tutorial, I will explain how to upload an image and how to validate image extension

 Create an HTML form with two text field :

• One is for Image title with input type text.
• The second one is for upload image with input type file. For file upload input must be a file(type=” file”). This input type shows the file select control.

<form name="uploadimage"  enctype="multipart/form-data" method="post">
<table width="100%"  border="0">
<tr>
<th width="26%" height="60" scope="row">Image Title:</th>
<td width="74%"><input type="text" name="imagetitle"  autocomplete="off" class="form-control" required /></td>
</tr>
<tr>
<th height="60" scope="row">Upload Image :</th>
<td><input type="file" name="image"  required /></td>
</tr>
<tr>
<th height="60" scope="row">&nbsp;</th>
<td><input type="submit" value="Submit" name="submit" class="btn-primary" /></td>
</tr>
</table>
</form>

Create a database with the name imagesdata. Inside this database, we create a table with the name tblimages.

SQL Script for tblimages—

CREATE TABLE IF NOT EXISTS `tblimages` (
  `id` int(11) NOT NULL,
  `ImagesTitle` varchar(120) DEFAULT NULL,
  `Image` varchar(150) DEFAULT NULL,
  `PostingDate` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=latin1;

Now create a database connection file(config.php)

<?php
define('DB_SERVER','localhost');
define('DB_USER','root');
define('DB_PASS' ,'');
define('DB_NAME', 'imagesdata');
$con = mysqli_connect(DB_SERVER,DB_USER,DB_PASS,DB_NAME);
// Check connection
if (mysqli_connect_errno())
{
 echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
?>

PHP Script for getting posted  values,  image validation, move images into directory and  insertion data into database

<?php
include_once("config.php");
if(isset($_POST['submit']))
{
// Posted Values
$imgtitle=$_POST['imagetitle'];
$imgfile=$_FILES["image"]["name"];
// get the image extension
$extension = substr($imgfile,strlen($imgfile)-4,strlen($imgfile));
// allowed extensions
$allowed_extensions = array(".jpg","jpeg",".png",".gif");
// Validation for allowed extensions .in_array() function searches an array for a specific value.
if(!in_array($extension,$allowed_extensions))
{
echo "<script>alert('Invalid format. Only jpg / jpeg/ png /gif format allowed');</script>";
}
else
{
//rename the image file
$imgnewfile=md5($imgfile).$extension;
// Code for move image into directory
move_uploaded_file($_FILES["image"]["tmp_name"],"uploadeddata/".$imgnewfile);
// Query for insertion data into database
$query=mysqli_query($con,"insert into tblimages(ImagesTitle,Image) values('$imgtitle','$imgnewfile')");
if($query)
{
echo "<script>alert('Data inserted successfully');</script>";
}
else
{
echo "<script>alert('Data not inserted');</script>";
}}
}
 ?>

How to run this script 

1. Download the zip
2. Extract zip file and put in the root directory
3. open phpmyadmin. Create a db imagesdata then import SQL file(given inside the package)