Question

在这个脚本中，我需要将$ count变量替换为wordpress数据库中的帖子计数：

<?php               
$state_query = $wpdb->get_results("
SELECT meta_value AS state, COUNT(post_id) AS count
FROM {$wpdb->postmeta} WHERE meta_key = 'state'
GROUP BY state ORDER BY count DESC"); 

$count = 50; //here i need to count the number of meta value of each post
$max = 100;
$scale = 1.0;

if ( !empty($max) ) { $percent = ($count * 100) / $max; } 
else { $percent = 0; }
?>

<?php if ($state_query) {
echo '<div class="cf">'; ?>
<?php foreach ($state_query as $st) 
echo ($percent * $scale);
?>              
<?php echo '</div>'; } ?>

Answer 1

尝试

$count = count($state_query);

Answer 2

您可以像这样使用num_rows

 $count = $wpdb->num_rows;

Answer 3

将$ wpdb声明为全局并使用它来执行返回PHP对象的SQL查询语句

试试这会对你有所帮助。

$state_query = $wpdb->get_results("
SELECT meta_value AS state, COUNT(post_id) AS count
FROM {$wpdb->postmeta} WHERE meta_key = 'state'
GROUP BY state ORDER BY count DESC", OBJECT ); 


if($wpdb->num_rows)
{
    foreach ($state_query  as $result)
    {
    $count = $result->count;
    $max = 100;
    $scale = 1.0;
    }
}else{
    $count = 50; //here i need to count the number of meta value of each post
    $max = 100;
    $scale = 1.0;
}

需要计算wordpress帖子的元值数量

3 个答案: