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触发条件
当数据库中 contents 表为空时,也即博客中无文章。
访问首页引发 functions.php 中 checkField 函数报错
array_key_exists(): Argument #2 ($array) must be of type array, null given
错误原因
由于 contents 表中没有数据。
functions.php 中 checkField 函数的判断字段是否存在语句。
$db->fetchRow($db->select()->from('table.contents'))
返回了一个null
。array_key_exists()
函数的第二个参数接受 null 后报错。解决方法
重写字段是否存在的判断逻辑。