we will create a simple widget,See this code and then paste it in your site-specific plugin or functions.php file to see it in 
action.  

// Creating the widget 
class wpb_widget extends WP_Widget {

function __construct() {
parent::__construct(
// Base ID of your widget
'wpb_widget', 

// Widget name will appear in UI
__('WPBeginner Widget', 'wpb_widget_domain'), 

// Widget description
array( 'description' => __( 'Sample widget based on WPBeginner Tutorial', 'wpb_widget_domain' ), ) 
);
}

// Creating widget front-end
// This is where the action happens
public function widget( $args, $instance ) {
$title = apply_filters( 'widget_title', $instance['title'] );
// before and after widget arguments are defined by themes
echo $args['before_widget'];
if ( ! empty( $title ) )
echo $args['before_title'] . $title . $args['after_title'];

// This is where you run the code and display the output
echo __( 'Hello, World!', 'wpb_widget_domain' );
echo $args['after_widget'];
}
  
// Widget Backend 
public function form( $instance ) {
if ( isset( $instance[ 'title' ] ) ) {
$title = $instance[ 'title' ];
}
else {
$title = __( 'New title', 'wpb_widget_domain' );
}
// Widget admin form
?>
<p>
<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:' ); ?></label> 
<input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>" />
</p>
<?php 
}
 
// Updating widget replacing old instances with new
public function update( $new_instance, $old_instance ) {
$instance = array();
$instance['title'] = ( ! empty( $new_instance['title'] ) ) ? strip_tags( $new_instance['title'] ) : '';
return $instance;
}
} // Class wpb_widget ends here

// Register and load the widget
function wpb_load_widget() {
 register_widget( 'wpb_widget' );
}
add_action( 'widgets_init', 'wpb_load_widget' );

With the last version of PHP, there are many actual methods included in the core language that you should use in your code files. These will help you a lot that you might have working out the easist way to creat a salt. So, if you are able to do, I suggest you to switch to using this method everywhere (if possible) you generate passwords.

Hashing Logic is as simple as you doing this:

password_hash('YouRSuperSecure&(*$p880$0w0rd!', PASSWORD_BCRYPT);

Example:- 

password_hash('YouRSuperSecure&(*$p880$0w0rd!', PASSWORD_BCRYPT, ['cost' => 16]);

How to Insert data into table from excel file in php

Step 1:- Open an excel file and save as "Excel Data" text file and in below sample code, "test.txt" is excel-data excel file.

Step 2:- Now, follow the below instruction for create code for insert data into table in mysql using php.


<?php
  include 'config.php';
// Connect to your database.

$fp = fopen("test.txt", "r");    // Open that file('Excel Data') for reading

while($line = fgets($fp))      // Loop through each line
{

     list ($name, $first) = explode("\t", $line);

     // Split the line by the Excel Data and store it in our list...

     $sql = "insert into user (name,phone) values ('$name', '$first')";

     // Generate sql string...

     mysql_query($sql) or die ( mysql_error() );        // Execute the sql

}

?>
Step 3:- Run file.

NOW INSTALL THE NEW XAMPP!

1. Download the latest version of XAMPP.
2. Install it in the same drive where your old xampp currently installed.
3. Now run the xampp control panel as Administrator.
4. Start both Apachee and MySQL server and check whether they are working properly or not, also check PhpMyAdmin page.
5. Now Copy the htdocs folder from ‘xampp-old’ folder to ‘xampp’ folder.
6. Go to xampp\php\php.ini
7. You can use CLI for importing database. It specially helps with very big databases. If so you can jump to step 19. If not follow the remaining steps.
8. Now configure the php.ini file and increase the value for the following options upload_max_filesize,memory_limit, post_max_size .
9. post_max_size and memory_limit need to be larger than upload_max_filesize. Make them high enough so big files can work on the server.
10. Go to ‘xampp\phpMyAdmin\libraries\config.default.php’
11. Look for $cfg[‘ExecTimeLimit’] = 800;
12. Change the value 800 to a higher value may be 8000.
13. Now restart both Apache and MySQL server.
14. Now go to phpMyAdmin then Go to Import tab
15. Import ‘all-db-dump-backup.sql’ file through the import option directly to server.
    Based on how many databases you have it will take some time.
16. If you have followed all the steps correctly you will get a success message “ Import has been successfully finished”.
17. After that run the following command mysql_upgrade in the Shell option.
18. Go ahead and check whether your site and databases are working properly or not.
19. If everything is working fine than you can delete the xampp-old file.

If you have followed my instructions then you should have a functioning XAMPP with no issues. If you do face any problem then please leave a comment and I will do my best to get back to you.  Enjoy!!

How can You get table cell values and cells text boxes values?That means getting childNodes values using java script.This is easy using core javascripts.

Returns a nice array of your data, then you can display it how you want.

function updateRowData(id) {
    if(confirm("Are you sure you want to update this row?")) {
    //    alert(id);
       
        $("tr#table-row-"+id).click(function() {
//var tableData = $("tr#table-row-"+id).children("td").map(function() { // you can use this also but you need to comment upper line ( $("tr#table-row-"+id).click(function() { ) and uncomment this line   
  var tableRow = $(this).children("td").map(function() {
        return $(this).text();
    }).get();

    alert("Your data is: " + $.trim(tableRow[0]) + " , " + $.trim(tableRow[1]) + " , " + $.trim(tableRow[2]));
});

    }
}

At the time functions.php is included during bootup, WordPress has no idea on the contents of the query, and doesn't know the nature of the page. is_home will return false.

Wrap the code in a function and have it triggered by the wp hook, which comes after the global query object has been hydrated with data.

add_action( 'wp', 'check_homepage' );
function check_homepage() {
    if ( is_home() )
        add_action( 'wp_enqueue_scripts', 'my_scripts' );
}

add_filter('the_content', 'trim_content');

// This function use to modify you content functions
function trim_content($content){
  $word_limit =30;
  $words = explode(' ', $content);
  return implode(' ', array_slice($words, 0, $word_limit));
}

OR

add_filter('the_content', 'trim_content');

// This function use if  the content having more than 100 charaters it converts into excerpt format.
function trim_content($content)
{
    if(is_archive())
    {
        // I'm getting the first 100 characters just to show an example you can change the value to get the words..
        $content = (strlen($content) <= 100)? $content : wp_html_excerpt($content, 100);
    }

    return $content;
}

If you really want to disable Updates and Installations, you can block users from installing/updating themes and plugins through the dashboard. Add this quick snippet to your wp-config.php file:

define('DISALLOW_FILE_MODS',true);
It will prevent users from installing and updating themes and plugins. It will also automatically disable theme and plugin editing in the dashboard.

Access to plugin and theme code is available in the WordPress dashboard. You can do one thing to protect the site from trifile to disable the both of these editors. Open your wp-config.php file and add the following constant:

define('DISALLOW_FILE_EDIT',true);

Now, when you are in the dashboard it is impossible to access the theme or plugin editor, even if you are admin.

In this tutorial, i will share how to send Email from XAMPP (PHP). i use XAMPP 1.8.1 version .This has been tested by me and it worked.

Lets start:-
first always make a backup before changing any code in core/configuration files.
then

Edit your php.ini in - “xampp\php\php.ini”

Before Changes:- 
---------------------------
[mail function]
; For Win32 only.
; http://php.net/smtp
SMTP = localhost
; http://php.net/smtp-port
smtp_port = 25

; For Win32 only.
; http://php.net/sendmail-from
;sendmail_from = postmaster@localhost

; XAMPP IMPORTANT NOTE (1): If XAMPP is installed in a base directory with spaces (e.g. c:\program filesD:\xampp) fakemail and mailtodisk do not work correctly.
; XAMPP IMPORTANT NOTE (2): In this case please copy the sendmail or mailtodisk folder in your root folder (e.g. C:\sendmail) and use this for sendmail_path.

; XAMPP: Comment out this if you want to work with fakemail for forwarding to your mailbox (sendmail.exe in the sendmail folder)
;sendmail_path = "\"\XAMPP\sendmail\sendmail.exe\" -t"

After Changes :-
-----------------------
[mail function]
; For Win32 only.
; http://php.net/smtp
SMTP = smtp.gmail.com
; http://php.net/smtp-port
smtp_port = 587

; For Win32 only.
; http://php.net/sendmail-from
sendmail_from = yourgmailid@gmail.com

; XAMPP IMPORTANT NOTE (1): If XAMPP is installed in a base directory with spaces (e.g. c:\program filesD:\xampp) fakemail and mailtodisk do not work correctly.
; XAMPP IMPORTANT NOTE (2): In this case please copy the sendmail or mailtodisk folder in your root folder (e.g. C:\sendmail) and use this for sendmail_path.

; XAMPP: Comment out this if you want to work with fakemail for forwarding to your mailbox (sendmail.exe in the sendmail folder)
sendmail_path = "\"\XAMPP\sendmail\sendmail.exe\" -t"

now

Edit your sendmail.ini - “xampp\sendmail\sendmail.ini”

Hi, in this tutorial we will discuss on current website url and current / working directory name

First you can get the name of the website by using

<?php echo $_SERVER['SERVER_NAME']; ?>
or
<?php echo $_SERVER['HTTP_HOST']; ?>

Now you can get the directory name

<?php echo dirname($_SERVER['PHP_SELF']); ?>

NOTE:
(if you are working on  multi folders and you need parent folder you can use 'dirname()'  function multi times

Example if you using 2 folders like /manage/user/ and you need parent folder only (i.e manage)

<?php echo dirname(dirname($_SERVER['PHP_SELF'])); ?>

you will get /admin result.

 )

Now the complete path

<?php echo "http://".dirname($_SERVER['SERVER_NAME']."".$_SERVER['PHP_SELF']); ?>

Result:  http://www.example.com/manage/user

and

complete the path with parent directory name

<?php echo "http://".dirname(dirname($_SERVER['SERVER_NAME']."".$_SERVER['PHP_SELF'])); ?>

Result:  http://www.example.com/manage

Put this code in functions.php file
<?php

if ( ! function_exists( 'wp_pagination' ) ) :
function wp_pagination() {
global $wp_query;

$int_val= 99999999; // need an unlikely integer

echo paginate_links( array(
'base' => str_replace( $int_val, '%#%', esc_url( get_pagenum_link( $int_val) ) ),
'format' => '?paged=%#%',
'current' => max( 1, get_query_var('paged') ),
'total' => $wp_query->max_num_pages
) );
}
endif;

?>

and put this code anywhere for pagination

<?php wp_pagination (); ?>

function generateRandomString($length = 10) {
    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $randomStringValue = '';
    for ($i = 0; $i < $length; $i++) {
        $randomStringValue .= $characters[rand(0, strlen($characters) - 1)];    }
    return $randomStringValue ;}

// Echo the random string.
echo generateRandomString(); 

Just keep a counter, increment it in the loop, and if it's an odd number set class to odd, if even set class to even. 

$result  = "";
$count = -1;

while ( $row = mysql_fetch_assoc( $query) ) {
  $class = $count++ % 2 === 0 ? "even" : "odd" ;
  $href  = $row["url"];
  $text  = $row["name"];
  $output .= "<li class='{$class}'><a href='foo?id={$href}'>{$name}</a></li>";
}

echo "<ul>{$result}</ul>";