{"id":108,"date":"2020-11-09T03:42:20","date_gmt":"2020-11-09T03:42:20","guid":{"rendered":"http:\/\/sites.bc.edu\/sonn\/?p=108"},"modified":"2023-03-27T15:57:37","modified_gmt":"2023-03-27T15:57:37","slug":"how-to-create-wordpress-plugin","status":"publish","type":"post","link":"https:\/\/sites.bc.edu\/sonn\/2020\/11\/09\/how-to-create-wordpress-plugin\/","title":{"rendered":"How to Create WordPress Plugin"},"content":{"rendered":"\n
    \n
  1. WordPress folder structure<\/li>\n\n\n\n
  2. How to create a blank plugin<\/li>\n\n\n\n
  3. How to create a static plugin<\/li>\n\n\n\n
  4. How to create simple dynamic plugin passing URL parameters<\/li>\n\n\n\n
  5. How to create complex plugin passing parameters through the WP shortcode array<\/li>\n<\/ol>\n\n\n\n

    1. WordPress folder structure<\/h4>\n\n\n\n

    WordPress folder structure seems complicated. The good news is the ONLY folder you want to work on is the [wp-content] folder. Under that folder, [plugins] & [themes] folders are the only folders you want to touch to minimize potential issues.<\/p>\n\n\n\n

    2. How to create a blank plugin<\/h4>\n\n\n\n
      \n
    1. Under [plugins] folder create a folder for your blank plugin. This will be the name of your plugin<\/li>\n\n\n\n
    2. Inside the plugin folder, you just created, create a PHP file with the exact same name. For example, if you created a folder named [testPlugin], you should create testPlugin.php inside that folder.<\/li>\n\n\n\n
    3. \nOpen up an editor and copy PHP code below and save.\n
      <?php
      \/**
      *Plugin Name: Write JSON
      *Description: Writing JSON plugin
      **\/
      ?>\n<\/code><\/pre><\/li>\n\n\n\n
    4. Open up your WP-Admin page (localhost\/wordpress\/wp-admin\/) and click [Plugins] menu. You will see the blank plugin named [testPlugin] listed. You can activate it.<\/li>\n<\/ol>\n\n\n\n
      3. How to create a static plugin<\/h4>\n\n\n\n
        \n
      1. Open testPlugin.php file in the editor.<\/li>\n\n\n\n
      2. A static plugin is a plugin do not accept any parameters.<\/li>\n\n\n\n
      3. If you copy and paste below code block to testPlugin.php file, this plugin will write HTML code assigned in $str variable.\n
        \n<?php
        \/**
        *Plugin Name: test plugin
        *Description: Writing test plugin
        addddadsa**\/
        function writePoem()
        {
        $str = \"Go placidly <\/span>amid the noise and the haste, and remember what peace there may be in silence. <be>As far as possible, without surrender, be on good terms with all persons.\";
        return $str;
        }
        add_shortcode('piPoem','writePoem')
        ?>\n<\/code><\/pre>\n<\/li>\n\n\n\n
      4. The way you use this plugin is simple. In an editor (classic or Gutenberg), just enter [testPlugin] shortcode anywhere in the editor, and the poem will display.<\/li>\n<\/ol>\n\n\n\n
        4. How to create a simple dynamic plugin passing URL parameters<\/h4>\n\n\n\n
          \n
        1. Open testPlugin.php file in the editor.<\/li>\n\n\n\n
        2. This plugin will add 2 number variables passed through URL parameters.<\/li>\n\n\n\n
        3. If you copy and paste below code block to testPlugin.php file, this plugin will add the 2 numbers.<\/li>\n\n\n\n
        4. \n
          \n<?php
          \/**
          *Plugin Name: test plugin
          *Description: Writing test plugin
          **\/
          function addNum()
          {
          $num1 = $_GET['num1'];
          $num2 = $_GET['num2'];
          return $num1 + $num2;
          }
          add_shortcode('piAdd,'addNum')
          ?>\n<\/code><\/pre>\n<\/li>\n\n\n\n
        5. To use this plugin, paste &num1=3&num2=4 at the end of the page you want to use this plugin<\/li>\n\n\n\n
        6. In the editor (classic or Gutenberg), just enter [testPlugin] shortcode anywhere in the editor, and the 2 numbers passed through the variables will be added.<\/li>\n<\/ol>\n\n\n\n
          4. How to create complex plugin passing parameters through the WP shortcode array<\/h4>\n\n\n\n
            \n
          1. Open testPlugin.php file in the editor.<\/li>\n\n\n\n
          2. This plugin will display BC cafeteria JSON menu and JSON parameters passed through shortcode parameters.<\/li>\n\n\n\n
          3. If you copy and paste below code block to testPlugin.php file, this plugin will display JSON data.<\/li>\n\n\n\n
          4. \n
            \n<?php
            \/**
            *Plugin Name: Write JSON
            *Description: Writing JSON plugin
            **\/
            function writeJson($attr)
            {
            $args = shortcode_atts( array(
            'jsonis' => ''
            ), $attr);
            $json=file_get_contents($args['jsonis']);
            $ojb = json_decode($json, TRUE);
            $str = \"\";
            $loc = \"\";
            foreach($ojb as $key => $value)
            {
            if ($loc <> $value['Location_Name'])
            {
            $str .= \"<b>\".$value['Location_Name'].\"<\/b><br>\";
            }
            $str .= $value['Ingredient_List'].\"<p>\";
            $loc = $value['Location_Name'];
            }return $str;
            }add_shortcode('piJson','writeJson')
            ?>\n<\/code><\/pre>\n<\/li>\n\n\n\n
          5. In the editor (classic or Gutenberg), just enter [piJson jsonis=’https:\/\/web.bc.edu\/dining\/menu\/todayMenu_PROD.json’] shortcode anywhere in the editor, and the 2 parameters and the plugin will display the JSON data.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
            \n1. WordPress folder structure WordPress folder structure seems complicated. The good news…\n<\/div>\n
            Continue reading “How to Create WordPress Plugin”<\/span>…<\/a><\/div>\n","protected":false},"author":131979,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-108","post","type-post","status-publish","format-standard","hentry","category-coding","entry"],"_links":{"self":[{"href":"https:\/\/sites.bc.edu\/sonn\/wp-json\/wp\/v2\/posts\/108","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.bc.edu\/sonn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sites.bc.edu\/sonn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sites.bc.edu\/sonn\/wp-json\/wp\/v2\/users\/131979"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.bc.edu\/sonn\/wp-json\/wp\/v2\/comments?post=108"}],"version-history":[{"count":8,"href":"https:\/\/sites.bc.edu\/sonn\/wp-json\/wp\/v2\/posts\/108\/revisions"}],"predecessor-version":[{"id":275,"href":"https:\/\/sites.bc.edu\/sonn\/wp-json\/wp\/v2\/posts\/108\/revisions\/275"}],"wp:attachment":[{"href":"https:\/\/sites.bc.edu\/sonn\/wp-json\/wp\/v2\/media?parent=108"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sites.bc.edu\/sonn\/wp-json\/wp\/v2\/categories?post=108"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sites.bc.edu\/sonn\/wp-json\/wp\/v2\/tags?post=108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}