How to exit a plugin’s execution mid-stream?

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I have a plugin that I want to ensure runs ONLY on singular posts, pages, etc. I’m using the is_singular() function and it works great – except that all it does is return execution to the rest of the plugin if I do this: 

function singular_check(){
    if(is_singular())
        return;
}

I’m executing it in a hook like so:

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add_action('wp', 'singular_check');

I need to actually make my entire plugin bail out at that point, and return to executing whatever else was downstream of my plugin. Anyone know how to do so?

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1 comment

  1. A possible solution would be to hook in way late (template redirect, for example), do your conditional check. If it passes, include (or require) a file that contains the stuff needed.

    <?php
add_action( 'template_redirect', 'wpse30291_template_redirect' );
function wpse30291_template_redirect()
{
    if( ! is_singular() ) return;
    require_once( 'your-file.php' );
}

    This is not going to work if your-file.php contains functions hooked into things that happened earlier (eg. init or wp). But if your-file.php contains things that, say, modified content (hooking in the_title or the_content, for instance) then it would be fine.