How to insert a php code from another php file?

Question

Im creating a custom function for my wordpress website that will add a review section below the post content and i need to insert this function from another another file into a custom function that i added to my functions.php. I need to get this piece of code $buffy .= $this->get_review(); from a different file to work in this function:

function content_injector($content) { 
    global $wp_query;   
    $postid = $wp_query->post->ID;

    if (is_single((get_post_meta($postid, 'top_ad', true) != 'off' )))  {
        $top_ad = do_shortcode('[td_ad_box spot_name="Ad spot -- topad"]');
    } 

    if (is_single((get_post_meta($postid, 'bottom_ad', true) != 'off' ))) {
        $bottom_ad = do_shortcode('[td_ad_box spot_name="Ad spot -- topad"]');
    }

    if (is_single()) {
        $review = //HOW DO I ADD THAT get_review CODE HERE?
        $custom_share = '<div id="title-deel"><h4 class="block-title"><span>DEEL</span></h4></div>' . do_shortcode('[ssba]');
        $facebook_comments = '<div id="title-reageer"><h4 class="block-title"><span>REAGEER</span></h4></div>' . '<div class="fb-comments" data-href="' . get_permalink() . '" data-colorscheme="light" data-numposts="5" data-mobile="false" data-width="700"></div>';
    }

    $content = $top_ad . $content . $bottom_ad . $custom_share . $facebook_comments;
    return $content; 
}

add_filter('the_content', 'content_injector');

As you can see i need to add the get_review function to $review, but i cant make it work on my own. How to make this work?

Yeah couldn't get the include funtion to get the get_review function to work! — Rik
– Rik, Commented Jan 9, 2014 at 23:25
You should place all your functions in the functions.php file to make it easier to work with on WordPress. However, include or require should do the job? — Maaz
– Maaz, Commented Jan 9, 2014 at 23:28
Well the $buffy .= $this->get_review(); code is located in a theme file similar to single.php, a file that constructs the lay out of post pages. — Rik
– Rik, Commented Jan 9, 2014 at 23:33

raj · Accepted Answer · 2014-01-09 23:26:53Z

2

Use include to include the file before using any methods from that file.

include("file_with_functions.php");

OR

Create a class (with filename same as classname).

Include the file.

Create an instance of the class.

Access the method in the class through the object

answered Jan 9, 2014 at 23:26

raj

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7 Comments

Andrew Brown Over a year ago

additionally if you want to ensure the file is only included once, use include_once(). also, depending on the type of error you want thrown if the file doesn't exist, look into require() and require_once()

Rik Over a year ago

Where in my fuction do i need to add the include function? I cant add it after right after $review = , right?

raj Over a year ago

you typically add the include to the top of the file though not necessarily. Then you could create an instance and call the method from within your content_injector method.

Rik Over a year ago

@raj, can u give me an example? I really have no idea how the code should look like...

raj Over a year ago

what is the class in which this function is located?

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