Restrict content access using shortcodes; based on roles, capabilities, user meta, and logged in status.

Kirill

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Adam Solymosi

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benwills

The mmbrs plugin allows you to restrict content access using shortcodes.
Content may be restricted based on role, capability, user meta, and logged-in status.
<h3>What makes mmbrs different:</h3>
<ul>
<li>Restriction based on role, capability, user meta, and logged-in status is 
all in one place.</li>
<li>You are able to restrict content based on if a user is=’not’. For 
example, Show this content if a user is not an administrator.</li>
<li>You can pass multiple variables to the roles and capabilities shortcodes. 
For example, Show this content to users who are subscribers, 
contributors, or editors.</li>
<li>By default, any content within these four shortcodes is not displayed in 
feeds. You may also set the showinfeed=’yes’ attribute to show the 
content in feeds.</li>
<li>It is as lean as I could get it, with logic ordering to cut down on 
processing. Which isn’t saying much, but if you’ve got suggestions, I’m 
open to hearing them.</li>
</ul>
<h3>The four mmbrs shortcodes are:</h3>
<ul>
<li>[mmbrs_logged_in]</li>
<li>[mmbrs_roles]</li>
<li>[mmbrs_capabilities]</li>
<li>[mmbrs_user_meta]</li>
</ul>
<h3>[mmbrs_logged_in]</h3>
<blockquote>
[mmbrs_logged_in]Content.[/mmbrs_logged_in]
</blockquote>
<ul>
<li>Attribute: none
<ul>
<li>Shows content to logged in users.</li>
</ul>
</li>
</ul>
<blockquote>
[mmbrs_logged_in is=’not’]Content.[/mmbrs_logged_in]
</blockquote>
<ul>
<li>Attribute: is
<ul>
<li>Optional.</li>
<li>is only accepts not.</li>
<li>Shows content to logged out users.</li>
<li>Case insensitive.</li>
</ul>
</li>
</ul>
<blockquote>
[mmbrs_logged_in showinfeed=’yes’]Content.[/mmbrs_logged_in]
</blockquote>
<ul>
<li>Attribute: showinfeed
<ul>
<li>Optional.</li>
<li>showinfeed only accepts yes.</li>
<li>Shows content in the feed and ignores all other attributes when displaying in the feed. (If it is not being displayed in a feed, all of the attributes take effect.)</li>
<li>Case insensitive.</li>
</ul>
</li>
</ul>
<h3>[mmbrs_roles]</h3>
<blockquote>
[mmbrs_roles]Content.[/mmbrs_roles]
</blockquote>
<ul>
<li>Attribute: none
<ul>
<li>Returns nothing.</li>
</ul>
</li>
</ul>
<blockquote>
[mmbrs_roles equals=’subscriber’]Content.[/mmbrs_roles]
</blockquote>
<ul>
<li>Attribute: equals
<ul>
<li>Required.</li>
<li>Accepts multiple. e.g. equals=’subscriber,contributor’</li>
<li>Shows content to users with the ‘subscriber’ role.</li>
<li>Case sensitive.</li>
</ul>
</li>
</ul>
<blockquote>
[mmbrs_roles is=’not’ equals=’subscriber’]Content.[/mmbrs_roles]
</blockquote>
<ul>
<li>Attribute: is
<ul>
<li>Optional.</li>
<li>Shows content to users who do not have the ‘subscriber’ role.</li>
<li>is only accepts not.</li>
<li>Case insensitive.</li>
</ul>
</li>
</ul>
<blockquote>
[mmbrs_roles showinfeed=’yes’]Content.[/mmbrs_roles]
</blockquote>
<ul>
<li>Attribute: showinfeed
<ul>
<li>Optional.</li>
<li>Shows content in the feed and ignores all other attributes when displaying in the feed. (If it is not being displayed in a feed, all of the attributes take effect.)</li>
<li>showinfeed only accepts yes.</li>
<li>Case insensitive.</li>
</ul>
</li>
</ul>
<h3>[mmbrs_capabilities]</h3>
<blockquote>
[mmbrs_capabilities]Content.[/mmbrs_capabilities]
</blockquote>
<ul>
<li>Attribute: none
<ul>
<li>Returns nothing.</li>
</ul>
</li>
</ul>
<blockquote>
[mmbrs_capabilities can=’delete_others_posts’]Content.[/mmbrs_capabilities]
</blockquote>
<ul>
<li>Attribute: can
<ul>
<li>Required.</li>
<li>Shows content to users with the ‘delete_others_posts’ capability.</li>
<li>Accepts multiple. e.g. can=’delete_others_posts,edit_others_posts’</li>
<li>Case sensitive.</li>
</ul>
</li>
</ul>
<blockquote>
[mmbrs_capabilities is=’not’ can=’delete_others_posts’]Content.[/mmbrs_capabilities]
</blockquote>
<ul>
<li>Attribute: is
<ul>
<li>Optional.</li>
<li>Shows content to users who do not have the ‘delete_others_posts’ capability.</li>
<li>is only accepts not.</li>
<li>Case insensitive.</li>
</ul>
</li>
</ul>
<blockquote>
[mmbrs_capabilities showinfeed=’yes’]Content.[/mmbrs_capabilities]
</blockquote>
<ul>
<li>Attribute: showinfeed
<ul>
<li>Optional.</li>
<li>Shows content in the feed and ignores all other attributes when displaying in the feed. (If it is not being displayed in a feed, all of the attributes take effect.)</li>
<li>showinfeed only accepts yes.</li>
<li>Case insensitive.</li>
</ul>
</li>
</ul>
<h3>[mmbrs_user_meta]</h3>
<blockquote>
[mmbrs_user_meta]Content.[/mmbrs_user_meta]
</blockquote>
<ul>
<li>Attribute: none
<ul>
<li>Returns nothing.</li>
</ul>
</li>
</ul>
<blockquote>
[mmbrs_user_meta key=’first_name’][/mmbrs_user_meta]
</blockquote>
<ul>
<li>Attribute: key (with no content)
<ul>
<li>Required. (key attribute is required. Content is not required.)</li>
<li>Shows a logged-in user’s first_name meta value.</li>
<li>Does NOT accept multiple values when content is null/empty.</li>
<li>Case sensitive.</li>
</ul>
</li>
</ul>
<blockquote>
[mmbrs_user_meta key=’first_name’]Content.[/mmbrs_user_meta]
</blockquote>
<ul>
<li>Attribute: key (with content)
<ul>
<li>Required. (key attribute is required. Content is not required.)</li>
<li>Shows content to logged-in user with the first_name meta value.</li>
<li>Accepts multiple as OR. e.g. key=’first_name,last_name’</li>
<li>Case sensitive.</li>
</ul>
</li>
</ul>
<blockquote>
[mmbrs_user_meta is=’not’ key=’first_name’]Content.[/mmbrs_user_meta]
</blockquote>
<ul>
<li>Attribute: is
<ul>
<li>Optional.</li>
<li>Shows content to users who do not have the first_name meta value.</li>
<li>is only accepts not.</li>
<li>Case insensitive.</li>
</ul>
</li>
</ul>
<blockquote>
[mmbrs_user_meta is=’not’ key=’first_name’ equals=’Ben’]Content.[/mmbrs_user_meta]
</blockquote>
<ul>
<li>Attribute: equals
<ul>
<li>Required.</li>
<li>Shows content to users who do not have the first_name user meta of ‘Ben’.</li>
<li>Case sensitive.</li>
</ul>
</li>
</ul>
<blockquote>
[mmbrs_user_meta showinfeed=’yes’]Content.[/mmbrs_user_meta]
</blockquote>
<ul>
<li>Attribute: showinfeed
<ul>
<li>Optional.</li>
<li>Shows content in the feed and ignores all other attributes when displaying in the feed. (If it is not being displayed in a feed, all of the attributes take effect.)</li>
<li>showinfeed only accepts ‘yes’.</li>
<li>Case insensitive.</li>
</ul>
</li>
</ul>
<h4>Other Notes:</h4>
For every shortcode, except [mmbrs_logged_in], if a user is not logged in, the shortcode will return nothing. The exception is when using is=’not’ in [mmbrs_logged_in], as in [mmbrs_logged_in is=’not’]Content.[/mmbrs_logged_in]
By default, everything is hidden from feeds unless showinfeed=’yes’ is defined.
<h4>Motivation for this plugin:</h4>
I wrote this plugin to fill some holes, reduce some unnecessary functions, and fix some minor bugs I found in other plugins. I now use this, and only this, to control all shortcode-based content access on my membership-style websites.
The Members plugin checks roles by checking capabilities. You are not supposed to do that. The proper way of checking roles is included here. Notes on this:
<ul>
<li><a href="https://codex.wordpress.org/Function_Reference/current_user_can#Notes" rel="nofollow ugc">WordPress current_user_can() Notes</a></li>
</ul>
Aside from that, I love and use the Members plugin and suggest you check it out for other role- and capability-based content access management.
I removed a bunch of stuff from the User Meta Shortcodes plugin that I didn’t want. If you want the additional functionality, I recommend that plugin.
In the end, I wanted very clear control of in-post content via shortcodes. I wasn’t finding anything that was totally stripped down. So I wrote this.
<h4>Inspiration and Credits:</h4>
<ul>
<li><a href="https://wordpress.org/plugins/members/" rel="ugc">Members Plugin</a></li>
<li><a href="https://wordpress.org/plugins/user-meta-shortcodes/" rel="ugc">User Meta Shortcodes Plugin</a></li>
<li><a href="http://docs.appthemes.com/tutorials/wordpress-check-user-role-function/" rel="nofollow ugc">AppThemes User Role Function</a></li>
</ul>

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