PHP implements the drag-and-drop grouping effect of friends on Google plus

Have you been looking for the friend drag and drop grouping function of Google PLS? Google's implementation is so cool! I have used PHP and jQuery to implement the same application of dragging friends to add groups. This PHP tutorial will tell you how to implement it. I hope my examples will be helpful to your social networking site project.

The effect is as follows:

The sample database contains three tables, namely the relationship between users and user groups.

User table Members

The table contains member (user) data, such as member_id, member_image, etc.

CREATE TABLE IF NOT EXISTS `members` (
`member_id` int(9) NOT NULL AUTO_INCREMENT,
`member_name` varchar(220) NOT NULL,
`member_image` text NOT NULL,
`dated` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
PRIMARY KEY (`member_id`)
);

User Groups Groups

CREATE TABLE IF NOT EXISTS `groups` (
`group_id` int(9) AUTO_INCREMENT,
`group_name` varchar(220),
`sort` int(9),
`date` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
PRIMARY KEY (`group_id`),
KEY `sort` (`sort`)
);

The relationship between user groups User_group

The relationship table user_group between users and user rental tables contains user_id (same as member_id), group_id, member_id() and sort (sort) fields.

CREATE TABLE IF NOT EXISTS `user_group` (
`id` int(9) NOT NULL AUTO_INCREMENT,
`user_id` int(9) NOT NULL,
`group_id` int(9) NOT NULL,
`member_id` int(9) NOT NULL,
`sort` int(9) NOT NULL,
PRIMARY KEY (`id`)
);

Javascript

We use drag and drop on two class attributes: .members and .group.

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.js"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.14/jquery-ui.js"></script>
<script type="text/javascript" src="jquery.livequery.min.js"></script>
<script type="text/javascript" >
$(function()
{
// Initiate draggable for public and groups
var $gallery = $( ".members, .group" );
$( "img", $gallery ).live("mouseenter", function()
{
var $this = $(this);
if(!$this.is(&#39;:data(draggable)&#39;))
{
$this.draggable({
helper: "clone",
containment: $( "#demo-frame" ).length ? "#demo-frame" : "document",
cursor: "move"
});
}
});
// Initiate Droppable for groups
// Adding members into groups
// Removing members from groups
// Shift members one group to another
$(".group").livequery(function(){
var casePublic = false;
$(this).droppable({
activeClass: "ui-state-highlight",
drop: function( event, ui ) {
var m_id = $(ui.draggable).attr(&#39;rel&#39;);
if(!m_id)
{
casePublic = true;
var m_id = $(ui.draggable).attr("id");
m_id = parseInt(m_id.substring(3));
}
var g_id = $(this).attr(&#39;id&#39;);
dropPublic(m_id, g_id, casePublic);
$("#mem"+m_id).hide();
$( "<li></li>" ).html( ui.draggable ).appendTo( this );
},
out: function(event, ui) {
var m_id = $(ui.draggable).attr(&#39;rel&#39;);
var g_id = $(this).attr(&#39;id&#39;);
$(ui.draggable).hide("explode", 1000);
removeMember(g_id,m_id);
}
});
});
// Add or shift members from groups
function dropPublic(m_id, g_id,caseFrom)
{
$.ajax({
type:"GET",
url:"groups.php?m_id="+m_id+"&g_id="+g_id,
cache:false,
success:function(response){
$.get("groups.php?reload_groups", function(data){
$("#groupsall").html(data);
$("#added"+g_id).animate({"opacity" : "10" },10);
$("#added"+g_id).show();
$("#added"+g_id).animate({"margin-top": "-50px"}, 450);
$("#added"+g_id).animate({"margin-top": "0px","opacity" : "0" }, 450);
});
}
});
}
// Remove memebers from groups
// It will restore into public groups or non grouped members
function removeMember(g_id,m_id)
{
$.ajax({
type:"GET",
url:"groups.php?do=drop&mid="+m_id,
cache:false,
success:function(response){
$("#removed"+g_id).animate({"opacity" : "10" },10);
$("#removed"+g_id).show();
$("#removed"+g_id).animate({"margin-top": "-50px"}, 450);
$("#removed"+g_id).animate({"margin-top": "0px","opacity" : "0" }, 450);
$.get("groups.php?reload", function(data){ $("#public").html(data); });
}
});
}
});
</script>

groups.php

Here we handle the data processing function of dragging and adding user groups.

<?php
require_once("multipleDiv.inc.php");
// Initiate Object
$obj = new Multiplediv();
// Add or Update Ajax Call
if(isset($_GET[&#39;m_id&#39;]) and isset($_GET[&#39;g_id&#39;]))
{
$obj->addMembers((int)$_GET[&#39;m_id&#39;], (int)$_GET[&#39;g_id&#39;]);
exit;
}
// Remove Memebers from groups Ajax call
if(isset($_GET[&#39;do&#39;]))
{
$obj->removeMember($_GET[&#39;mid&#39;]);
exit;
}
// Reload groups each ajax call
if(isset($_GET[&#39;reload&#39;])){ echo $obj->getMembers_reload(); exit; }
if(isset($_GET[&#39;reload_groups&#39;])){ echo $obj->getmembergroups_reload(); exit; }
// Initiate Groups and members
$members = $obj->public_members();
$groups = $obj->groups();
?>
Friends
<div id="main_portion">
<div id="public">
<!-- Initiate members -->
<?php
if(!isset($members))
$members = $obj->public_members();
if($members)
{
foreach($members as $member)
{
extract($member);
echo "<div class=&#39;members&#39; id=&#39;mem".$member_id."&#39;>\n";
echo "<img src=&#39;images/".$member_image."&#39; rel=&#39;".$member_id."&#39;>\n";
echo "<b>".ucwords($member_name)."</b>\n";
echo "</div>";
}
}
else
echo "Members not available";
?>
</div>
<div id="groupsall">
Groups
<!-- Initiate Groups -->
<?php
if(!isset($groups))
$groups = $obj->groups();
if($groups)
{
foreach($groups as $group)
{
extract($group);
echo "<div id=&#39;".$group_id."&#39; class=&#39;group&#39;>\n";
echo ucwords($group_name);
echo "<div id=&#39;added".$group_id."&#39; class=&#39;add&#39; style=&#39;display:none;&#39; ><img src=&#39;images/green.jpg&#39;></div>";
echo "<div id=&#39;removed".$group_id."&#39; class=&#39;remove&#39; style=&#39;display:none;&#39; ><img src=&#39;images/red.jpg&#39;></div>";
echo "<ul>\n";
echo $obj->updateGroups($group_id);
echo "</ul></div>";
}
}
?>
</div>
</div>

multipleDiv.inc.php

Modify the database connection information here.

<?php
// Database declaration&#39;s
define("SERVER", "localhost");
define("USER", "username");
define("PASSWORD", "password");
define("DB", "database");
  
class Multiplediv
{
........................
........................
.........................
}
?>

At this point, we are finished on how to implement the friend drag and drop grouping function of Google plus. The above is the entire content of this article. I hope it will be helpful to everyone's learning. I also hope that everyone will support the PHP Chinese website.

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