Update blob image in Database with UPDATE MySQL using PHP - php

Question

I am trying to update a record in my database which is a blob type, I can insert using this method really easily but when using UPDATE it doesn't seem to work, only for text. Would someone be able to point me in the right direction?
Here is my code:
<?php
$conn=mysqli_connect("localhost","root","root","plantidentify");
// Check connection
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$ufamid = mysqli_real_escape_string($conn, $_POST['ufamilyid']);
$ucommonname = mysqli_real_escape_string($conn, $_POST['ucomname']);
$usynname = mysqli_real_escape_string($conn, $_POST['usynonyms']);
$uspecies = mysqli_real_escape_string($conn, $_POST['uspecies']);
$uprop = mysqli_real_escape_string($conn, $_POST['upropagation']);
$uimageData = mysqli_real_escape_string($conn, (file_get_contents($_FILES['uimage']['tmp_name'])));
$uheight = mysqli_real_escape_string($conn, $_POST['uheight']);
$utreeclass = mysqli_real_escape_string($conn, $_POST['utreeclass']);
$ulifecycle = mysqli_real_escape_string($conn, $_POST['ulifecycle']);
$UpdateQuery = "UPDATE plant
SET FamilyID='$ufamid', CommonName='$ucommonname',
SynonymNames='$usynname', Species='$uspecies',
Propagation='$uprop', Image='$uimageData',
Height='$uheight', TreeClass='$utreeclass',
Lifecycle='$ulifecycle'
WHERE PlantID='$_POST[uplantid]'";
if (!mysqli_query($conn,$UpdateQuery)) {
die('Error: ' . mysqli_error($conn));
}
header("Location: plantedit.php");
mysqli_close($conn);
?>
$uimageData is the variable in which contains the uploaded file from my form in another file. The column in my database where I am trying to update the blob is called "Image".
This might help, here is the form code that is in another .php which the update plant.php gets fired from:
<?php //display databse values
while($plant=mysql_fetch_array($retval)) {
echo"<form action=updateplant.php method=post>";
echo "<tr>";
echo "<td>" . "<input type=number name=ufamilyid value='" .$plant['FamilyID']."' ></td>";
echo "<td>" . "<input type=text name=ucomname value='" .$plant['CommonName']."' ></td>";
echo "<td>" . "<input type=text name=usynname value='" .$plant['SynonymNames']."' ></td>";
echo "<td>" . "<input type=text name=uspecies value='" .$plant['Species']."' ></td>";
echo "<td>" . "<input type=text name=uprop value='" .$plant['Propagation']."' ></td>";
echo "<td>" . "<input type=file name=uimage></td>";
echo "<td>" . '<img class="crop2" src="data:image/jpeg;base64,'. base64_encode( $plant['Image'] ).'"/>'." </td>";
echo "<td>" . "<input type=number name=uheight value='" .$plant['Height']."' ></td>";
echo "<td>" . "<input type=text name=utreeclass value='" .$plant['TreeClass']."' ></td>";
echo "<td>" . "<input type=text name=ulifecycle value='" .$plant['Lifecycle']."' ></td>";
echo "<td>" . "<input type=hidden name=uplantid value='" .$plant['PlantID']."' ></td>";
echo "<td>" . "<input type=submit name=update value=Update" . " ></td>";
echo "</tr>";
echo "</form>";
}//end while
mysql_close($conn);
?>

Answer 1

to upload a file you should mention enctype='multipart/form-data' in form . Hope this will fix your problem.
<?php
//display databse values
while($plant=mysql_fetch_array($retval)) {
echo"<form action='updateplant.php' method='post' enctype='multipart/form-data' >";
echo "<tr>";
echo "<td>" . "<input type=number name=ufamilyid value='" .$plant['FamilyID']."' ></td>";
echo "<td>" . "<input type=text name=ucomname value='" .$plant['CommonName']."' ></td>";
echo "<td>" . "<input type=text name=usynname value='" .$plant['SynonymNames']."' ></td>";
echo "<td>" . "<input type=text name=uspecies value='" .$plant['Species']."' ></td>";
echo "<td>" . "<input type=text name=uprop value='" .$plant['Propagation']."' ></td>";
echo "<td>" . "<input type=file name=uimage></td>";
echo "<td>" . '<img class="crop2" src="data:image/jpeg;base64,'. base64_encode( $plant['Image'] ).'"/>'." </td>";
echo "<td>" . "<input type=number name=uheight value='" .$plant['Height']."' ></td>";
echo "<td>" . "<input type=text name=utreeclass value='" .$plant['TreeClass']."' ></td>";
echo "<td>" . "<input type=text name=ulifecycle value='" .$plant['Lifecycle']."' ></td>";
echo "<td>" . "<input type=hidden name=uplantid value='" .$plant['PlantID']."' ></td>";
echo "<td>" . "<input type=submit name=update value=Update" . " ></td>";
echo "</tr>";
echo "</form>";
}//end while
mysql_close($conn);
?>

Answer 2

Looks like you have a typo in the WHERE statement, $_POST[uplantid] should be ". $_POST['uplantid'] ."