if 语句在函数内部没有找到变量（Wordpress 插件）

Question

该变量在函数内不可访问。当我在函数外回显变量时，我得到了正确的结果。当我在函数内回显/使用变量时，我得到一个“注意：未定义变量：/setup.php 中的 crLocalIncompleteStatus 35”

有任何想法吗？

<?php

    global $wpdb;

    $table_name = $wpdb->prefix . 'crLocal';

    $crLocalIncompleteStatus = '';

    $crLocalCompleteStatus = '';

    $crLocal_DBChecked = $wpdb->get_var("SELECT COUNT(*) FROM $table_name");

    function crLocal_CheckDB() {

        global $crLocal_DBChecked,  $crLocalIncompleteStatus, $crLocalCompleteStatus;

        if ($crLocal_DBChecked == '0') { 

            $crLocalIncompleteStatus = 'block' ;

            $crLocalCompleteStatus = 'none' ;

        } elseif ($crLocal_DBChecked != '0') { 

            $crLocalIncompleteStatus = 'none' ;

            $crLocalCompleteStatus = 'block' ;

        } else {

            // Broken

            // More Code to follow

        }

        echo $crLocal_DBChecked;

    }

    crLocal_CheckDB();

    $crLocalInstallIncomplete = '<div id="crLocalInstallIncomplete" style="display: '.$crLocalIncompleteStatus.';">' ;

    $crLocalInstallComplete = '<div id="crLocalInstallComplete" style="display: '.$crLocalCompleteStatus.';">' ;

?>

所以我需要：

当数据库中的计数为 0 时，$crLocalIncompleteStatus 为 'block'，大于 0 时为 'none'。

当数据库中的计数为 0 时，$crLocalCompleteStatus 为 'none'，大于 0 时为 'block'。

Answer 1

这是因为您的变量 $crLocalIncompleteStatus 超出了您的函数范围，您可以通过将该变量作为参数添加到函数中来更正此问题function crLocal_CheckDB($crLocalIncompleteStatus) {&nbsp; &nbsp; global $crLocal_DBChecked,&nbsp; $crLocalIncompleteStatus, $crLocalCompleteStatus;&nbsp; &nbsp; if ($crLocal_DBChecked == '0') {&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; $crLocalIncompleteStatus = 'block' ;&nbsp; &nbsp; &nbsp; &nbsp; $crLocalCompleteStatus = 'none' ;&nbsp; &nbsp; } elseif ($crLocal_DBChecked != '0') {&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; $crLocalIncompleteStatus = 'none' ;&nbsp; &nbsp; &nbsp; &nbsp; $crLocalCompleteStatus = 'block' ;&nbsp; &nbsp; } else {&nbsp; &nbsp; &nbsp; &nbsp; // Broken&nbsp; &nbsp; &nbsp; &nbsp; // More Code to follow&nbsp; &nbsp; }&nbsp; &nbsp; echo $crLocal_DBChecked;}crLocal_CheckDB($crLocalIncompleteStatus);