Cool Guy Yo Cool Guy Yo - 3 months ago 12
PHP Question

Don't understand why if statement doesnt have {}

I have the following line in a function in wordpress

if(empty($paged)) $paged = 1;
and I don't understand why it doesn't have an opening
{
and a closing
}
. Is it self opening and closing, not sure if that is even a term

Here is the function I am working with

<?php
function kriesi_pagination($pages = '', $range = 2)
{
$showitems = ($range * 2)+1;

global $paged;
if(empty($paged)) $paged = 1;

if($pages == '')
{
global $wp_query;
$pages = $wp_query->max_num_pages;
if(!$pages)
{
$pages = 1;
}
}

if(1 != $pages)
{
echo "<div class='pagination'>";
if($paged > 2 && $paged > $range+1 && $showitems < $pages) echo "<a href='".get_pagenum_link(1)."'>&laquo;</a>";
if($paged > 1 && $showitems < $pages) echo "<a href='".get_pagenum_link($paged - 1)."'>&lsaquo;</a>";

for ($i=1; $i <= $pages; $i++)
{
if (1 != $pages &&( !($i >= $paged+$range+1 || $i <= $paged-$range-1) || $pages <= $showitems ))
{
echo ($paged == $i)? "<span class='current'>".$i."</span>":"<a href='".get_pagenum_link($i)."' class='inactive' >".$i."</a>";
}
}

if ($paged < $pages && $showitems < $pages) echo "<a href='".get_pagenum_link($paged + 1)."'>&rsaquo;</a>";
if ($paged < $pages-1 && $paged+$range-1 < $pages && $showitems < $pages) echo "<a href='".get_pagenum_link($pages)."'>&raquo;</a>";
echo "</div>\n";
}
}

?>

Answer

If the code you want to run after the if conditional is only one line you can omit the brackets. I find it confusing, so I don't do it but it is valid PHP.

So, what your code does works:

if(empty($paged)) $paged = 1;

So would this:

if(empty($paged)) 
    $paged = 1; // semi-colon marks the end of the line

This would not:

if(empty($paged)) $paged = 1; $othervar = 2;

Nor would this:

if(empty($paged)) 
   $paged = 1; 
   $othervar = 2;

$othervar, in both cases, would "execute" outside the conditional-- ie., it would always be set to 2.

There is another thread here: PHP - If/else, for, foreach, while - without curly braces?

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