help simplify if while list loop in wordpress

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<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
....
<?php endwhile; endif; ?>

could understand the code on the above well.

1, could i delete the if and while condition? using <?php the_post();?> directly.

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2, i feel the if (have_posts()) is the same as the while (have_posts()) .is it redundance?

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3 comments

  1. #1: Calling the_post without a loop will only let you display a single post. This could be desirable on single-post pages, for example, where the while loop is often omitted:

    <?php
// single.php
if ( have_posts() ):
    the_post();
?>
<p><?php the_content(); ?></p>
<? else: ?>
<p>No post found.</p>
<? endif ?>

    #2: You’re correct — the snippet you posted is redundant in its combination of if and while.

    In most themes, however, this is the usage:

    <?php
if ( have_posts() ):
    while ( have_posts() ): the_post();
?>
<div class="post"><?php the_content(); ?></div>
<?php endwhile; else: ?>
<p>No posts found.</p>
<?php endif; ?>

    The use of the if statement in this case allows you to display something if there are no posts at all. If we were to just use the while loop in that code, pages without any posts would output nothing.

  2. while(have_postS()) will automatically evaluate have_postS() as by if(have_postS())

    but it will continue as long as it is true (since it is a loop), if you have to loop and some mechanism that terminates loop, then use while

    else

    for once if will do better.

  3. I don’t know WordPress, but by the looks of it, has_posts() returns either a truthy or falsy value. The while loop only executes if a truthy value is passed as the condition, so yes, you can reduce it to a whoopin 3 lines:

    <?php while (have_posts()) : the_post(); ?>
....
<?php endwhile;?>

    Edit: Put this as yet another example as to why copy-pasting code is bad…