如何检查WordPress的自定义表是否为空 [英] how to check wordpress custom table is empty or not
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问题描述
有关wordpress表格的问题.
我正在创建一个插件,我想检查名为wp_school_post
的表是否为空.
This question about wordpress cutom table..
I am creating a plugin I want to check a table named wp_school_post
table empty or not.
请参阅下面的代码,该错误将引发以下错误
See my code below which throws the following error
Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in C:\xampp\htdocs\getwp\wp-content\plugins\getwp_P\schools_post_function.php on line 7
**filled**
我的代码:
function schools_post_function()
{
// echo "Sachool POST function";
global $wpdb;
$result = $wpdb->get_results("SELECT postid from wp_school_post WHERE `postid` IS NOT NULL");
if(mysql_num_rows($result=='0'))
{
echo "not filled";
}
else
{
echo "filled";
}
}
推荐答案
尝试一下:)
<?php
function schools_post_function()
{
global $wpdb;
$result = $wpdb->get_results("SELECT postid from wp_school_post WHERE `postid` IS NOT NULL");
if(count($result) == 0)
{
echo "not filled";
}
else
{
echo "filled";
}
}
?>
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