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Hello, how to make a button for change image and upload image with database. Please help me

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          <img src="images/user_profile.png"  >

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            <?php  if (isset($_SESSION['user'])) : ?>
            <div class="box-body no-padding">
              <font size="6%" face="Comic Sans MS">
              <strong><?php echo $_SESSION['user']['username']; ?></strong>
                <i  style="color: #00f7fc;">(<?php echo ucfirst($_SESSION['user']['user_type']); ?>)</i></div></font>
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                <small>
               <a href="index.php?logout='1'"><button class="button">Logout</button></a>
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    .button {
        background-color: #555555; 
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        cursor: pointer;
    }

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    <body>

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Last Post by Shankar.Shiv
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<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<div class="main">
<h1>Ajax Image Upload</h1><br/>
<hr>
<form id="uploadimage" action="" method="post" enctype="multipart/form-data">
<div id="image_preview"><img id="previewing" src="noimage.png" /></div>
<hr id="line">
<div id="selectImage">
<label>Select Your Image</label><br/>
<input type="file" name="file" id="file" required />
<input type="submit" value="Upload" class="submit" />
<input type="hidden" name="image_id" id="image_id" value="2" class="submit" />
</div>
</form>
</div>
<h4 id='loading' >loading..</h4>
<div id="message"></div>
<style>
.userimg {
width: 50px;
height:auto;
}
</style>
<script type="text/javascript">
$(document).ready(function (e) {
$("#uploadimage").on('submit',(function(e) {
e.preventDefault();
$("#message").empty();
$('#loading').show();
$.ajax({
url: "upload.php", // Url to which the request is send
type: "POST", // Type of request to be send, called as method
data: new FormData(this), // Data sent to server, a set of key/value pairs (i.e. form fields and values)
contentType: false, // The content type used when sending data to the server.
cache: false, // To unable request pages to be cached
processData:false,// To send DOMDocument or non processed data file it is set to false
success: function(data) // A function to be called if request succeeds
{
$('#loading').hide();
$("#message").html(data);
}
});
}));

// Function to preview image after validation
$(function() {
$("#file").change(function() {
$("#message").empty(); // To remove the previous error message
var file = this.files[0];
var imagefile = file.type;
var match= ["image/jpeg","image/png","image/jpg"];
if(!((imagefile==match[0]) || (imagefile==match[1]) || (imagefile==match[2])))
{
$('#previewing').attr('src','noimage.png');
$("#message").html("<p id='error'>Please Select A valid Image File</p>"+"<h4>Note</h4>"+"<span id='error_message'>Only jpeg, jpg and png Images type allowed</span>");
return false;
}
else
{
var reader = new FileReader();
reader.onload = imageIsLoaded;
reader.readAsDataURL(this.files[0]);
}
});
});
function imageIsLoaded(e) {
$("#file").css("color","green");
$('#image_preview').css("display", "block");
$('#previewing').attr('src', e.target.result);
$('#previewing').attr('width', '250px');
$('#previewing').attr('height', '230px');
};
});

</script>
<style>
body {
font-family: 'Roboto Condensed', sans-serif;
}
h1
{
text-align: center;
background-color: #FEFFED;
height: 70px;
color: rgb(95, 89, 89);
margin: 0 0 -29px 0;
padding-top: 14px;
border-radius: 10px 10px 0 0;
font-size: 35px;
}
.main {
position: absolute;
top: 50px;
left: 20%;
width: 450px;
height:530px;
border: 2px solid gray;
border-radius: 10px;
}
.main label{
color: rgba(0, 0, 0, 0.71);
margin-left: 60px;
}
#image_preview{
position: absolute;
font-size: 30px;
top: 100px;
left: 100px;
width: 250px;
height: 230px;
text-align: center;
line-height: 180px;
font-weight: bold;
color: #C0C0C0;
background-color: #FFFFFF;
overflow: auto;
}
#selectImage{
padding: 19px 21px 14px 15px;
position: absolute;
bottom: 0px;
width: 414px;
background-color: #FEFFED;
border-radius: 10px;
}
.submit{
font-size: 16px;
background: linear-gradient(#ffbc00 5%, #ffdd7f 100%);
border: 1px solid #e5a900;
color: #4E4D4B;
font-weight: bold;
cursor: pointer;
width: 300px;
border-radius: 5px;
padding: 10px 0;
outline: none;
margin-top: 20px;
margin-left: 15%;
}
.submit:hover{
background: linear-gradient(#ffdd7f 5%, #ffbc00 100%);
}
#file {
color: red;
padding: 5px;
border: 5px solid #8BF1B0;
background-color: #8BF1B0;
margin-top: 10px;
border-radius: 5px;
box-shadow: 0 0 15px #626F7E;
margin-left: 15%;
width: 72%;
}
#message{
position:absolute;
top:120px;
left:815px;
}
#success
{
color:green;
}
#invalid
{
color:red;
}
#line
{
margin-top: 274px;
}
#error
{
color:red;
}
#error_message
{
color:blue;
}
#loading
{
display:none;
position:absolute;
top:50px;
left:850px;
font-size:25px;
}
</style>

the above code will help you please try this code.......

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