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13 Aug 2015

Get value from drop down box using PHP

The drop down box allows you to select one or more values from it. The HTML tag "select" is also known as "drop down" or "pul down" box.You can get value from drop down box using PHP while form submitting.

HTML form with drop down box

The below example describes how to create HTML form with drop down box.

<html>
<body>
<form action="#" method="post">
<select name="country">
<option value="USA">USA</option>
<option value="United Kingdom">United Kingdom</option>
<option value="France">France</option>
<option value="Russia">Russia</option>
<option value="India">India</option>
</select>
<input type="submit" name="submit" value="Submit">
</form>
</body>
</html>

Retrieve input data from drop down box using PHP

You can retrieve input data from drop down box using following types in PHP.

$_POST['drop_down_name'] (if method is post)

$_GET['drop_down_name'] (if method is gett)

$_REQUEST['drop_down_name'] (if method is either post or get)

The following PHP script describes how to retrieve input data from drop down box while form submitting.

While submitting form with select country from drop down box, you can get selected country as output.

Related Post:

Store form values into MySQL table using PHP

18 Apr 2015

Create Search API like itunes Search API using PHP and MySQL

The Apple itunes provided a search API for retrieve app information from it. The Apple search API display result as JSON format. Do you want to know more information about Apple itunes search API, then visit iTunes Search API.

You can also create search API like Apple itunes search API if you know how to create JSON file using PHP. Due to this, you can provide search API for your websites. If you didn't know create JSON file using PHP and MySQL, then visit How to get output as JSON format using PHP and Mysql.

Generate Search API using PHP and MySQL

Lets see how to create search API using PHP. Follow below steps to generate search API for your websites using PHP.

Step1: Connect MySQL database using PHP

Connect your MySQL database to get stored values from it using PHP. The PHP code for connect MySQL database is below:

mysql_connect('localhost','root','') or die(mysql_error());
mysql_select_db('fitness') or die(mysql_error());

Step2: Get value from url using PHP

While user search something on your search API, you need to get those values for search from url. So only you can provide particular results from your MySQL database. This is done by below PHP code.

$field=$_REQUEST['field'];
$limit=$_REQUEST['limit'];

Step3: Make MySQL select query

After got values from url, you've to make MySQL query to select corresponding results from database. You can get zero or more than one values from urls for search. You should make MySQL query like below using PHP.

if($field!='' && $limit!='')
{
$cond="where name='".$field."' order by id desc limit 0, $limit";
}
if($field=='' && $limit!='')
{
$cond="order by id desc limit 0, $limit";
}
if($field!='' && $limit=='')
{
$cond="where name='".$field."' order by id desc limit 0, 50";
}
if($field=='' && $limit=='')
{
$cond="order by id desc limit 0, 50";
}
$q=mysql_query("select * from f_img $cond") or die(mysql_error());

Step4: Add header for get output as JSON format

You must add header type ato your PHP script for get output as JSON format. This is like below

header('Content-Type: Application/json');

Step5: Add content to JSON file using PHP

You need to create 2 array for create output as multidimensional array. Retrieve values from query result using mysql_fetch_array. Then you push values to array using array_push() in PHP. Finally encode the results to display output as JSON format using json_encode().

The full PHP code for create search API is represented below,

<?php
error_reporting('E_ALL ^ E_NOTICE');
mysql_connect('localhost','root','') or die(mysql_error());
mysql_select_db('fitness') or die(mysql_error());
$field=$_REQUEST['field'];
$limit=$_REQUEST['limit'];
if($field!='' && $limit!='')
{
$cond="where name='".$field."' order by id desc limit 0, $limit";
}
if($field=='' && $limit!='')
{
$cond="order by id desc limit 0, $limit";
}
if($field!='' && $limit=='')
{
$cond="where name='".$field."' order by id desc limit 0, 50";
}
if($field=='' && $limit=='')
{
$cond="order by id desc limit 0, 50";
}
$q=mysql_query("select * from user $cond") or die(mysql_error());
header('Content-Type: Application/json');
$details=array();
$user=array();
while($res=mysql_fetch_array($q))
{
$user['name']=$res['name'];
$user['state']=$res['state'];
$user['country']=$res['country'];
array_push($details,$user);
}
//print_R($details);
echo json_encode($details);

?>

Your JSON output should be like below,

[
{"name":"Clark","state":"California","country":"USA"},
{"name":"Anderson","state":"Los Angeles","country":"USA"},
{"name":"Smith","state":"London","country":"United Kingdom"},
{"name":"Jones","state":"Cambridge","country":"United Kingdom"},
{"name":"Nathan","state":"Franche Comte","country":"France"},
{"name":"Marie","state":"Paris","country":"France"},
{"name":"Nastya","state":"St Petersburg ","country":"Russia"},
{"name":"Dima","state":"Moscow","country":"Russia"},
{"name":"Linh","state":"Hanoi","country":"vietnam"},
{"name":"Hoang","state":"Hai Phong","country":"vietnam"},
]

Step6 : .htaccess

Add following lines to your .htaccess file

RewriteRule ^search search.php [L]

Now you entered search on address bar, the .htaccess redirects you to search.php file. You can get search API using below url types.

http://www.phponwebsites.com/search?field=nathan&limit=10
http://www.phponwebsites.com/search?field=nathan
http://www.phponwebsites.com/search?limit=10
http://www.phponwebsites.com/search

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Get APP or Game details from Apple iTunes using PHP

14 May 2014

Pagination using php and mysql with jquery and ajax

You can display values with pagination using php. But you have to pass the page number and also relevant values through url. So your url look like this:

pagination.php?p=2

The good php website should be contain good url strucutre. Thats why you alter the urls using .htaccess. You don't need to show passing values in url. It can be hidden by .htaccess. If you don't know, just visit Redirect urls using htaccess.
So you need ajax and jquery to pass the values. Already you know the basic pagination concept. Otherwise, please visit Pagination using php and mysql.

Pagination using juery and ajax:

You need small function which is called by onclick event to display values with pagination in php. The jquery function as follows as:

Where,
- function page(e){} is called from click event.
ie, <a onclick="return page('.$i.')">'.$i.'</a>

- e is a page number passed from click event.
- pagination.php is name of this php file.
You define the url, data, dataType and type in ajax post to pass the values.

The overall php script for pagination:

<html>
<body>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<div id='page'>
<?php
error_reporting('E_ALL ^ E_NOTICE');
mysql_connect('localhost','root','') or die(mysql_error());
mysql_select_db('new') or die(mysql_error());
$page=$_REQUEST['p'];
$limit=10;
if($page=='')
{
$page=1;
$start=0;
}
else
{
$start=$limit*($page-1);
}
$query=mysql_query("select * from table1 limit $start, $limit") or die(mysql_error());
$tot=mysql_query("select * from table1") or die(mysql_error());
$total=mysql_num_rows($tot);
$num_page=ceil($total/$limit);
echo'<table><th>Reg.Id</th><th>Name</th><th>Category</th>';
while($res=mysql_fetch_array($query))
{
echo'<tr><td>'.$res['game_ID'].'</td><td>'.$res['game_Title'].'</td><td>'.$res['category_Name'].'</td></tr>';
}
echo'</table>';
function pagination($page,$num_page)
{
echo'<ul style="list-style-type:none;">';
for($i=1;$i<=$num_page;$i++)
{
if($i==$page)
{
echo'<li style="float:left;padding:3px;">'.$i.'</li>';
}
else
{
echo'<li style="float:left;margin- left:4px;background:rgb(170,177,35);padding:4px;cursor:pointer;border:1px solid darkgreen ;"><a onclick="return page('.$i.')">'.$i.'</a></li>';
}
}
echo'</ul>';
}
if($num_page>1)
{
pagination($page,$num_page);
}
?>
<script type="text/javascript">
function page(e) {
$.ajax({
url:'pagination.php',
data:{p:e},
dataType:'html',
Type:'post',
success:function(e){
$('#page').html(e);
}
});
}
</script>
</div>
</body>

</html>

You'll get output like like this:

pagination using php and jquery with ajax

Now you can paginated to next page. The url structure of your website should be fine.

Note:
For pagination, you need any jquery reference like:
" <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script> "

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Sorting column with pagination by clicking column header using php and mysql

17 Apr 2014

Pagination using php and mysql

Pagination in php is very simple concepts. You can learn easily. Just follow the below steps.

1. Find the Start values based on page number:

$limit=10;
$page=$_GET['p'];
if($page=='')
{
$page=1;
$start=0;
}
else
{
$start=$limit*($page-1);
}

Where,
$limit is the number rows per page.
$page is page number.
$start is starting point of limit in mysql query.
If the page number is 1, then the start is 0 which is find by $start=$limit*($page-1).
$start=10*(1-1)
$start=10*(0)
$start=0

If the page number is 2, then the start is 10.
Similarly, if the page number is 3, then the start is 20.

2. Find total number of records in mysql table:

Then we need to calculate the total number of data in table. Then find the maximum pages using php script like below:

$tot=mysql_query("SELECT * FROM table1") or die(mysql_error());
$total=mysql_num_rows($tot);
$num_page=ceil($total/$limit);

Where,
mysql_num_rows() returns the numbers results in numeric.
ceil() returns the whole digit number. ie, ceil(2.3) => 3.
$maxpage returns the number of pages.

3. Function for pagination:

The php script for pagination function is:

function pagination($page,$num_page)
{
echo'<ul style="list-style-type:none;">';
for($i=1;$i<=$num_page;$i++)
{
if($i==$page)
{
echo'<li style="float:left;padding:5px;">'.$i.'</li>';
}
else
{
echo'<li style="float:left;padding:5px;"><a href="pagination.php?p='.$i.'">'.$i.'</a></li>';
}
}
echo'</ul>';
}

Where,
You need to use for loop for display number of pages in mysql table.

4.The whole php code for pagination as follows as:

<?php
error_reporting('E_ALL ^ E_NOTICE');
mysql_connect('localhost','root','') or die(mysql_error());
mysql_select_db('new') or die(mysql_error());
$page=$_REQUEST['p'];
$limit=10;
if($page=='')
{
$page=1;
$start=0;
}
else
{
$start=$limit*($page-1);
}
$query=mysql_query("select * from table1 limit $start, $limit") or die(mysql_error());
$tot=mysql_query("select * from table1") or die(mysql_error());
$total=mysql_num_rows($tot);
$num_page=ceil($total/$limit);
echo'<table><th>Reg.Id</th><th>Name</th><th>Category</th>';
while($res=mysql_fetch_array($query))
{
echo'<tr><td>'.$res['game_ID'].'</td><td>'.$res['game_Title'].'</td><td>'.$res['category_Name'].'</td></tr>';
}
echo'</table>';
function pagination($page,$num_page)
{
echo'<ul style="list-style-type:none;">';
for($i=1;$i<=$num_page;$i++)
{
if($i==$page)
{
echo'<li style="float:left;padding:5px;">'.$i.'</li>';
}
else
{
echo'<li style="float:left;padding:5px;"><a href="pagination.php?p='.$i.'">'.$i.'</a></li>';
}
}
echo'</ul>';
}
if($num_page>1)
{
pagination($page,$num_page);
}
?>

Now you'll get output like this:

Now you can paginated to next page.

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