How to use is_admin in page content?

Question

I'm trying to add a "Click here to edit this page" button in some Wordpress pages.

This button should only appear if the user is admin, this is the code that should appear if the user is admin:

if ( current_user_can( 'manage_options' ) ) {

<div class="action">
<div class="pe-container"><section class="row-fluid">
<div class="span12">
<h5>To edit this page <a href="wp-admin/post.php?post=179&amp;action=edit">CLICK HERE <i class="icon-right-open-mini"></i></a></h5>
</div>
</section></div>
</div>

} else {
    return false;
}

This code outputs this:

Answer 1

As @Rarst said, use PHP code inside a post content is bad habit. But you can use another workaround to show a section only for appropriate users.

Add the following code into your functions.php file:

add_shortcode( 'if_user_can', 'wpse8170_show_content_if_user_can' );
function wpse8170_show_content_if_user_can( $atts, $content = '' ) {
    $atts = shortcode_atts( array( 'capability' => 'edit_posts' ), $atts );
    return current_user_can( $atts['capability'] ) ? $content : '';
}

This snippet will allow you to use [if_user_can capability="..."]...[/if_user_can] shortcode in your posts. You can pass a capability into shortcode by using capability="..." attribute. If an user has required capability, then shortcode content will be shown, otherwise nothing will appea on a page.

Use it like this:

[if_user_can capability="edit_posts"]
<div class="action">
<div class="pe-container"><section class="row-fluid">
<div class="span12">
<h5>To edit this page <a href="wp-admin/post.php?post=179&amp;action=edit">CLICK HERE <i class="icon-right-open-mini"></i></a></h5>
</div>
</section></div>
</div>
[/if_user_can]

Answer 2

WordPress does not allow PHP code in content. While there are some solutions to circumvent that, it's typically bad idea from security point of view.

Edit links are often implemented in theme's template files rather than content. If placing it in content arbitrarily is hard requirement your best option is probably to create shortcode for it, using Shortcode API.