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    The recommended practice should be to use set_post_thumbnail_size()
    for custom thumbnail sizes.  This is a wrapper for add_image_size()
    specifically made for theme authors to create a custom post
    thumbnail size.  That, in turn, allows us plugin developers to check
    if a theme has created a custom thumbnail size with easy checks
    like:<br>
    <br>
    if ( has_image_size( 'post-thumbnail' ) )<br>
        /* do something cool because themes used
    set_post_thumbnail_size() */<br>
    <br>
    The use of add_image_size() should be used for additional image
    sizes.<br>
    <br>
    <div class="moz-cite-prefix">On 4/19/2014 6:16 AM, Chip Bennett
      wrote:<br>
    </div>
    <blockquote
cite="mid:CAPdLKqetP=Kg+VBWATNoT7ViGKx7Uu=eQa2SJQAXNVGjRXd4bg@mail.gmail.com"
      type="cite">
      <div dir="ltr">set_post_thumbnail_size() is allowed.
        <div><br>
        </div>
        <div>I think the *recommended* practice should be to use
          add_image_size(), but we have no requirement in that regard.</div>
      </div>
      <div class="gmail_extra"><br>
        <br>
        <div class="gmail_quote">On Sat, Apr 19, 2014 at 6:03 AM,
          carolina poena <span dir="ltr"><<a moz-do-not-send="true"
              href="mailto:myazalea@hotmail.com" target="_blank">myazalea@hotmail.com</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div>
              <div dir="ltr">It was mentioned in a review
                that set_post_thumbnail_size is not allowed, but I would
                like some clarification.<br>
                Is this required or recommended, and what alternative
                solution should I recommend to authors who are using
                set_post_thumbnail_size?<br>
                 <br>
                (<a moz-do-not-send="true"
href="https://codex.wordpress.org/Function_Reference/set_post_thumbnail_size"
                  target="_blank">https://codex.wordpress.org/Function_Reference/set_post_thumbnail_size</a>)<br>
              </div>
            </div>
            <br>
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            <br>
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      <pre wrap="">_______________________________________________
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