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What is the best practice to show social icons always on all the posts and pages.

Already I am firing pre_get_comments in my functions.php to show a sidebar between the post content and the comments. Also I added the code after the_content() of page.php...

The Question: How can I choose the propper Hook?

  1. Fire pre_get_comments + add code after the_content() in page.php...
  2. Filter the_content() and use conditionals, something as is_singular()...

What is the best practice? Why?

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    If it helps, there are several cases in which pre_get_comments won't get fired: post types without comments support, specific templates not loading the comments' template, posts without comments if the comments are closed, etcetera. I would probably stick with the_content filter facing several conditionals first. – Luis Sanz Apr 4 '16 at 22:20
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    If you want to add social icons to post and pages, why use a hook for comments? Use the_content filter. – cybmeta Apr 5 '16 at 6:58
  • Good Point. Yes you both are right, comments are not always firing with content. I choice the_content filter adding some conditional before inside the custom_function. Thank you :) – Apeiron Apr 5 '16 at 9:46
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As noted by @cybmeta the most convenient way to add something on every post would be to use the_content filter.

This may give you unexpected results on archive pages, because some themes use the_content to display information on those, while others use the_excerpt. So, depending on what you want, you may want to use the filter on the_content only on singular pages or add the same filter to the excerpt as well.`

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