错误错误错误-慕课网

错误错误错误

来源：4-2 表单输入过滤

lcy_0910

2018-02-01 16:35

Notice: Undefined variable: comments in D:\phpStudy\WWW\MySQLi2\mysqli\imoocComment\index.php on line 23 Warning: Invalid argument supplied for foreach() in D:\phpStudy\WWW\MySQLi2\mysqli\imoocComment\index.php on line 23 ???要炸了看不懂了

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3回答

zjl43

2018-11-04 10:17:13

加上这个if就可以了

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zjl43

2018-11-04 10:16:50

if(!empty($comments)){
foreach($comments as $val){
echo $val->output();
}
}

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sipei

2018-02-02 19:48:51

有个变量未定义，提示在 foreach() 函数中那个变量是无效的，说是在 23 行,你仔细看看呗

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