How to create simple plugin in WORDPRESS

How to create simple plugin in WORDPRESS

Create a new folder in yourSite/wp-content/plugins/

 Create a new php file in this folder (ex- products.php)

 Open products.php file in editor and add these lines into your page at the top

    <?php
    /*
    Plugin Name: Your Plugin Name
    Plugin URI: Your Plugin URI
    Description: A very simple Plugin
    Author: Your Name
    Version: 1.0
    Author URI: Custom
    */ ?>


  Now Create functions into this file


    add_action('admin_menu', 'admin_menu_item');   // add a new  menu item in admin panel
    add_action('init', 'import_csv_data');        //initialize a function on the front page of plugin

    function admin_menu_item(){
        // see http://codex.wordpress.org/Adding_Administration_Menus
        add_menu_page('Shareasale Product Import','Shareasale Feed Import','administrator','shareasale_import','shareasale_import');
    }

    function shareasale_import(){
   
        echo '<div class="wrap"><h2>Import Shareasale.com data feed:</h2>';
        echo '<form enctype="multipart/form-data" name="import_form" method="post" action="#"><table>';
        echo '<tr><td>CSV:</td><td><input type="file" name="datafeed" /></td></tr>';
        echo '<tr><td>Shareasale affiliate ID:</td><td><input type="text" name="affiliateid" /></td></tr>';
        echo '<tr><td></td><td><input type="submit" name="importfeed" value="Start import" /></td></tr>';
        echo '</table></form>';
        echo '</div>';
    }


    function import_csv_data() {
    global $wpdb;
    if(isset($_POST['importfeed']))
      {   
          if($_POST['affiliateid']!="" && $_FILES['datafeed']!="")
           {
   
       $affid = $_POST['affiliateid'];
       $getData = file_get_contents($_FILES['datafeed']['tmp_name']); //file_get_contents("29482.txt");

       $getdata_row = explode(PHP_EOL, $getData);

       foreach($getdata_row as $line){
                if(trim($line) != ''){
                    $bits[] = explode('|',$line);
                }
            }

         foreach ($bits as $key => $value) {
                $product_id = trim($value[0]);
          
        $query = $wpdb->query("SELECT wp_postmeta.meta_id FROM wp_postmeta WHERE 1 AND wp_postmeta.meta_key = 'product_id' AND wp_postmeta.meta_value = '$product_id'");
        if(!$query)
             {

                $title = trim($value[1]);
                $description = $value[11];
                $stock_status = $value[18];
                $manufacturer = $value[19];
                if($value[12] != ''){ $description .= "<br /><br />".$value[12]; }
                if($value[13] != ''){ $description .= "<br /><br />".$value[13]; }
                if($value[14] != ''){ $description .= "<br /><br />".$value[14]; }
                if($value[15] != ''){ $description .= "<br /><br />".$value[15]; }
                $description = trim($description);
                $postcategories = $value[9];
                $merchentid =  $value[2];

                if($value[5] != ''){ $image_thumb = $value[5]; $image_thumb = trim($image_thumb); }

                if($value[6] != '') { $image_large = $value[6]; $image_large = trim($image_large);  } // 5-thumb / 6-big image
               
                    if($value[7] != ''){ $price = $value[7]; }else{ $price = $value[8]; } // 7-price / 8-retail price
                               
                $affiliateurl = trim(str_replace('YOURUSERID',$affid,$value[4]));
       

        // Add Featured Image to Post
            $upload_dir = wp_upload_dir(); // Set upload folder
            $image_data = @file_get_contents($image_thumb); // Get image data
            $filename   = basename($image_thumb); // Create image file name

            if($image_data!==false)
            {
                    // Check folder permission and define file location
                    if( wp_mkdir_p( $upload_dir['path'] ) ) {
                        $file = $upload_dir['path'] . '/' . $filename;
                    } else {
                        $file = $upload_dir['basedir'] . '/' . $filename;
                    }

                    // Create the image  file on the server
                    file_put_contents( $file, $image_data );
                    // Check image file type
                    $wp_filetype = wp_check_filetype( $filename, null );

                    // Set attachment data
                    $attachment = array(
                        'post_mime_type' => $wp_filetype['type'],
                        'post_title'     => sanitize_file_name( $filename ),
                        'post_content'   => '',
                        'post_status'    => 'inherit'
                    );
       
            }

                    $postid = wp_insert_post(array( 'post_title'=>$title,'post_type'=>'product', 'post_content'=>$description, 'post_author'=>1, 'post_status'=>'publish' ));
                    add_post_meta($postid,'product_id', $product_id);
                    add_post_meta($postid, 'image_thumb', $image_thumb);
                    add_post_meta($postid,'image_large', $image_large);
                    add_post_meta($postid, 'price', $price);
                    add_post_meta($postid, 'affid', $affiliateurl);       
                    add_post_meta($postid,'merchentid', $merchentid);
                    add_post_meta($postid,'catagory', $postcategories);
                    add_post_meta($postid,'stock_status', $stock_status);
                    add_post_meta($postid,'manufacturer', $manufacturer);

                    if($image_data!==false)
                        {
                                // Create the attachment
                                $attach_id = wp_insert_attachment( $attachment, $file, $postid );

                                // Include image.php
                                require_once(ABSPATH . 'wp-admin/includes/image.php');

                                // Define attachment metadata
                                $attach_data = wp_generate_attachment_metadata( $attach_id, $file );

                                // Assign metadata to attachment
                                wp_update_attachment_metadata( $attach_id, $attach_data );

                                // And finally assign featured image to post
                                set_post_thumbnail( $postid, $attach_id );
                        }           
               }       
            }   
                echo '<script>alert("CSV IMPORTED SUCCESSFULLY!");</script>';

      }else {
                 echo '<script>alert("All fields are required!");</script>';
            }
         }
     }



add_action( 'init', 'create_post_type' );
function create_post_type() {
  add_theme_support('post-thumbnails');
  register_post_type( 'product',
    array(
      'labels' => array(
        'name' => __( 'Products' ),
        'singular_name' => __( 'Product' )
      ),
      'public' => true,
      'has_archive' => true,
      'supports' => array( 'title', 'editor','thumbnail', 'custom-fields' )
    )
  );
}

function getallproducts()
 {
$type = 'product';
$args=array(
  'post_type' => $type,
  'post_status' => 'publish',
  'posts_per_page' => -1,
  'caller_get_posts'=> 1);
?>
<div class="search_product_wrapper">
    <form method="get" id="searchform" action="<?php bloginfo('home'); ?>/">
    <div><input type="text" size="18" value="<?php echo wp_specialchars($s, 1); ?>" name="s" id="s" class="home_searchbox" />
    <input type="submit" id="searchsubmit" value="Search" class="btn btn_home_search" />
    </div>
  </form>
   
  
   </div>
   <div style="clear:both"></div>
   <?php
$my_query = null;
$my_query = new WP_Query($args);
if( $my_query->have_posts() ) {
  while ($my_query->have_posts()) : $my_query->the_post();
      $post_id = get_the_ID();

      $meta_values = get_post_meta($post_id, "price", true);
      $meta_manufacturer = get_post_meta($post_id, "manufacturer" , true);


    if (strlen(get_the_title()) > 35) {
          $product_title = substr(get_the_title(), 0, 40);
        $product_title = substr($product_title, 0, strrpos($product_title, ' ')) . " ...";
    } else {
        $product_title = get_the_title();
    }

   ?>

    <div class="col-sm-3 product_wrapper">
        <p>
            <?php if (has_post_thumbnail()) { the_post_thumbnail(); } else { ?> <img src="<?php bloginfo('template_directory'); ?>/not-available.jpg" alt="<?php the_title(); ?>" height="150px" width="150px" /> <?php } ?>
        </p>
        <div class="title_wrapper">
            <a class="nodecor" href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php echo $product_title; ?></a>
            <div class="manu_title"><?php if(!empty($meta_manufacturer)) { echo $meta_manufacturer; } ?></div>
        </div>
        <p class="price_wrapper"><?php echo $meta_values;  ?></p>
    </div>
    <?php
  endwhile;
}
wp_reset_query();  // Restore global post data stomped by the_post().

 

 }

 add_shortcode('getallproducts', 'getallproducts');


 -------------------------------------------------------
             UPDATED CODE
---------------------------------------------------------

<?php
/*
Plugin Name: Shareasale Feed Importer
Plugin URI:
Description: A very simple Shareasale data  importer
Author: webplanetsoft
Version: 1.0
Author URI: http://webplanetsoft.com
*/

add_action('admin_menu', 'admin_menu_item');
add_action('init', 'import_csv_data');

function admin_menu_item(){
  // see http://codex.wordpress.org/Adding_Administration_Menus
  add_menu_page('Shareasale Product Import','Shareasale Feed Import','administrator','shareasale_import','shareasale_import');
}

function shareasale_import(){
 
  echo '<div class="wrap"><h2>Import Shareasale.com data feed:</h2>';
  echo '<form enctype="multipart/form-data" name="import_form" method="post" action="#"><table>';
  echo '<tr><td>CSV:</td><td><input type="file" name="datafeed" /></td></tr>';
  echo '<tr><td>Shareasale affiliate ID:</td><td><input type="text" name="affiliateid" /></td></tr>';
  echo '<tr><td></td><td><input type="submit" name="importfeed" value="Start import" /></td></tr>';
  echo '</table></form>';
  echo '</div>';
}



function import_csv_data() {
global $wpdb;
if(isset($_POST['importfeed']))
  {
    if($_POST['affiliateid']!="" && $_FILES['datafeed']!="")
     {

   $affid = $_POST['affiliateid'];
   $getData = file_get_contents($_FILES['datafeed']['tmp_name']);

   $getdata_row = explode(PHP_EOL, $getData);

   foreach($getdata_row as $line){
      if(trim($line) != ''){
        $bits[] = explode('|',$line);
      }
    }

  foreach ($bits as $key => $value) {
      $product_id = trim($value[0]);
      
        $query = $wpdb->get_results("SELECT wplc_postmeta.meta_id FROM wplc_postmeta WHERE 1 AND wplc_postmeta.meta_key = 'product_id' AND wplc_postmeta.meta_value = '$product_id'");
  $total_result_rows = $wpdb->num_rows;

  if($total_result_rows == 0)
       {
   
      $title = trim($value[1]);
      $description = $value[11];
      $stock_status = $value[18];
      $manufacturer = $value[19];
      if($value[12] != ''){ $description .= "<br /><br />".$value[12]; }
      if($value[13] != ''){ $description .= "<br /><br />".$value[13]; }
      if($value[14] != ''){ $description .= "<br /><br />".$value[14]; }
      if($value[15] != ''){ $description .= "<br /><br />".$value[15]; }
      $description = trim($description);
      $postcategories = $value[9];
      $merchentid =  $value[2];

      if($value[5] != ''){ $image_thumb = $value[5]; $image_thumb = trim($image_thumb); }

      if($value[6] != '') { $image_large = $value[6]; $image_large = trim($image_large);  } // 5-thumb / 6-big image
       
        if($value[7] != ''){ $price = $value[7]; }else{ $price = $value[8]; } // 7-price / 8-retail price
               
      $affiliateurl = trim(str_replace('YOURUSERID',$affid,$value[4]));
   

    // Add Featured Image to Post
    $upload_dir = wp_upload_dir(); // Set upload folder
    $image_data = @file_get_contents($image_thumb); // Get image data
    $filename   = basename($image_thumb); // Create image file name

    if($image_data!==false)
    {
        // Check folder permission and define file location
        if( wp_mkdir_p( $upload_dir['path'] ) ) {
            $file = $upload_dir['path'] . '/' . $filename;
        } else {
            $file = $upload_dir['basedir'] . '/' . $filename;
        }

        // Create the image  file on the server
        file_put_contents( $file, $image_data );
        // Check image file type
        $wp_filetype = wp_check_filetype( $filename, null );

        // Set attachment data
        $attachment = array(
            'post_mime_type' => $wp_filetype['type'],
            'post_title'     => sanitize_file_name( $filename ),
            'post_content'   => '',
            'post_status'    => 'inherit'
        );
   
    }

        $postid = wp_insert_post(array( 'post_title'=>$title,'post_type'=>'product', 'post_content'=>$description, 'post_author'=>1, 'post_status'=>'publish' ));
        add_post_meta($postid,'product_id', $product_id);
        add_post_meta($postid, 'image_thumb', $image_thumb);
        add_post_meta($postid,'image_large', $image_large);
        add_post_meta($postid, 'price', $price);
        add_post_meta($postid, 'affid', $affiliateurl);  
        add_post_meta($postid,'merchentid', $merchentid);
        add_post_meta($postid,'catagory', $postcategories);
        add_post_meta($postid,'stock_status', $stock_status);
        add_post_meta($postid,'manufacturer', $manufacturer);

        if($image_data!==false)
          {
              // Create the attachment
              $attach_id = wp_insert_attachment( $attachment, $file, $postid );

              // Include image.php
              require_once(ABSPATH . 'wp-admin/includes/image.php');

              // Define attachment metadata
              $attach_data = wp_generate_attachment_metadata( $attach_id, $file );

              // Assign metadata to attachment
              wp_update_attachment_metadata( $attach_id, $attach_data );

              // And finally assign featured image to post
              set_post_thumbnail( $postid, $attach_id );
            }    
       } 
    }
      echo '<script>alert("CSV IMPORTED SUCCESSFULLY!");</script>';

  }else {
      echo '<script>alert("All fields are required!");</script>';
    }
   }
 }

add_action( 'init', 'create_post_type' );
function create_post_type() {
  add_theme_support('post-thumbnails');
  register_post_type( 'product',
    array(
      'labels' => array(
        'name' => __( 'Products' ),
        'singular_name' => __( 'Product' )
      ),
      'public' => true,
      'has_archive' => true,
      'supports' => array( 'title', 'editor','thumbnail', 'custom-fields' )
    )
  );
}

function getallproducts()
 {
 ?>
  <div class="search_product_wrapper">
    <form method="get" id="searchform" action="<?php bloginfo('home'); ?>/">
    <div><input type="text" size="18" value="<?php echo wp_specialchars($s, 1); ?>" name="s" id="s" class="home_searchbox" />
    <input type="submit" id="searchsubmit" value="Search" class="btn btn_home_search" />
    </div>
  </form>
   
  
   </div>
   <div style="clear:both"></div>

 <?php
$type = 'product';
$args=array(
  'post_type' => $type,
  'post_status' => 'publish',
  'posts_per_page' => 5,
  'caller_get_posts'=> 1);

$my_query = null;
$my_query = new WP_Query($args);
if( $my_query->have_posts() ) { //<?php query_posts('showposts=5'); if (have_posts()) : while (have_posts()) : the_post();
  while ($my_query->have_posts()) : $my_query->the_post();
    $post_id = get_the_ID();

    $meta_values = get_post_meta($post_id, "price", true);
    $meta_manufacturer = get_post_meta($post_id, "manufacturer" , true);


    if (strlen(get_the_title()) > 35) {
      $product_title = substr(get_the_title(), 0, 35);
    $product_title = substr($product_title, 0, strrpos($product_title, ' ')) . " ...";
  } else {
    $product_title = get_the_title();
  }

   ?>
 
    <div class="col-sm-3 product_wrapper">
      <div>
        <a href="<?php the_permalink() ?>"><?php if (has_post_thumbnail()) { the_post_thumbnail(); } else { ?> <img  class="default-img-class" src="<?php bloginfo('template_directory'); ?>/not-available.jpg" alt="<?php the_title(); ?>" height="150px" width="150px" /> <?php } ?></a>
      </div>
      <div class="title_wrapper">
        <a class="nodecor" href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?> "><?php echo $product_title; ?></a>
        <div class="manu_title"><?php if(!empty($meta_manufacturer)) { echo $meta_manufacturer; } ?></div>
      </div>
      <p class="price_wrapper">$<?php echo $meta_values;  ?></p>
  </div>
    <?php
  endwhile;
}
wp_reset_query();  // Restore global post data stomped by the_post().
?>
<div class="all_stores_avail">
   <div class="titleof_block"></div>
   <div class="store-data-container"><?php echo do_shortcode('[jw_easy_logo slider_name="stores"]'); ?></div>
</div>

 <?php
 

 }

 add_shortcode('getallproducts', 'getallproducts');


function get_post_data_with_details()
{  
  $meta_catagory = get_post_meta(get_the_ID(), "catagory" , true);


    $args = array(
        'post_type'   => 'product',
        'post_status' => 'publish',
        'meta_key' => 'catagory',
        'meta_value' => $meta_catagory,
  'showposts'  => 5,
        'orderby'     => 'rand'
        );
    $posts = get_posts( $args );

    // DO NOTHING
    if( !$posts )
        return;

    foreach( $posts as $post )
    {
       $catagroy_title = $product_details['catagory'];
       $meta = get_post_meta( $post->ID );
     $product_meta_details="";
     foreach ($meta as $key => $metavalue) {
      $product_meta_details[$key] = $metavalue[0];
     }
    
        $product_title = $post->post_title;
         if (strlen($product_title) > 35) {
          $product_title = substr($product_title, 0, 35);
        $product_title = substr($product_title, 0, strrpos($product_title, ' ')) . " ...";
      }
        ?>
      <div class="col-sm-3 product_wrapper bottom_pro_wrap">
      <div class="img_pro_wrap">
        <a href="<?php echo $post->guid; ?>"><img  class="default-img-class" src="<?php echo $product_meta_details['image_large']  ?>" alt="<?php the_title(); ?>" height="150px" width="100%" /></a>
      </div>
      <div class="title_wrapper bottom_title_wrap">
        <a class="nodecor" href="<?php echo $post->guid; ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?> "><?php echo $product_title; ?></a>
        <div class="manu_title"><?php if(!empty($product_meta_details['manufacturer'])) { echo $product_meta_details['manufacturer']; } ?></div>
      </div>
      <p class="price_wrapper">$<?php echo $product_meta_details['price'];  ?></p>
  </div>

   <?php
    }
}

add_shortcode('getrelatedproducts', 'get_post_data_with_details');

function add_css() {
?>
<style>

.store-data-container { margin-top:50px; }
.store-data-container a { text-decoration:none!important; }
.title_wrapper a { text-decoration:none!important; color: #fb7203!important; }
.title_wrapper a:hover { text-decoration:none!important; color: black!important; }
.product_wrapper {
    border: 1px solid #dedede;
    display:inline-block;
    margin-bottom: 10px;
    margin-right: 10px;
    padding: 15px;
    width: 160px;
    vertical-align:top;
    height:255px;
    background-color: #fff;
}
.img_pro_wrap { height:190px; }
.bottom_pro_wrap { height:270px; padding-top:0px; }
.price_wrapper { float: right; font-weight: bold;}
.title_wrapper { border-bottom:1px solid #dedede; margin-bottom:0px; padding-bottom:10px; height:65px;  }
.bottom_title_wrap { height: 60px;
    margin-bottom: 0;
    padding-bottom: 0; }
.nodecor { text-decoration:none; }
.default-img-class { padding-top:10px; }

.product_wrapper:hover {
   -moz-box-shadow:    inset 0 0 10px #000000;
   -webkit-box-shadow: inset 0 0 10px #000000;
   box-shadow:         inset 0 0 10px #000000;
}
.search_product_wrapper {
    text-align:center;
    margin:50px;
}
.home_searchbox {
    height: 30px;
    width: 590px;
}
.btn_home_search {
    height: 37px;
}
.gallery-holder {
    width: 37%;
    float:left;
}
.title_product a {
    color: #3d3d3d;
    font-size: 30px;
    font-weight: 500;
    letter-spacing: -1px;
    line-height: 36px;
}

.right_body.availability {
    display: inline-block;
    line-height: 20px;
    margin: 0 0 0 21px;
    vertical-align: top;
}
.price { padding-top:30px; }
.price-current {
    color: #28124a;
    display: inline-block;
    font-size: 40px;
    font-weight: 700;
    vertical-align: top;
}
.qnt-holder {
    display: inline-block;
    margin: 24px 0;
    vertical-align: top;
}

.right_body #addto-cart {
    margin: 0 0 0 18px;
}
.le-button.huge {
    padding: 18px 52px;
}
.le-button {
    background-color: #f27a24;
}
.le-button {
    border: medium none;
    border-radius: 4px;
    color: #fff;
    display: inline-block;
    font-size: 15px;
    font-weight: bold;
    line-height: 20px;
    padding: 10px 20px;
    text-transform: capitalize;
    transition: all 0.3s ease 0s;
}
.brand {
    border-bottom: 2px solid #dedede;
    padding-bottom: 40px;
}
.availability label {
    display: inline-block;
    font-weight: 700;
    margin-bottom: 5px;
    margin-top:5px;
    color:grey;
}
.availability .available {
    color: #59b210;
    font-weight: 700 !important;
    text-transform: capitalize;
}
.product_description_tab { padding-top:30px;}
.tab_button {
     background-color: #f27a24;
     border-radius: 10px 10px 0 0;
     color: #fff;
     font-size: 18px;
     font-weight: bold;
     padding: 20px 20px 20px 25px;
     width: 115px;
}

.tab_details {
    background-color: #fff;
    border: 1px solid #dedede;
    margin-right: 20px;
    padding: 20px;
    margin-bottom:40px;
}
.desc_tab1 { font-weight:bold; padding:5px; color:grey; font-size:17px; }
.desc_tab1_content { padding:5px; color:grey; }

.price_wrapper{
    float: right;
    font-weight: bold!important;
    text-align:right;
    width:100%;
}
   </style>
<?php }

add_action('wp_footer', 'add_css');
?>