Question

$this->get_name = mysqli_fetch_assoc(mysqli_query($this->link,"SELECT complete_name FROM student WHERE email='$this->email'"));

mysqli_query($this->link, $this->drop_query) or die(mysql_error());

echo $this->get_name['complete_name'].  " has been marked as Left!";

当我运行时，我得到以下内容：

“约翰被标记为左！”

但是当我跑步时

echo ".$this->get_name['complete_name'] has been marked as Left!";

我明白了：

“Array ['complete_name']已标记为Left！”

他们不应该打印相同的东西吗？

Answer 1

PHP：s解析器不知道变量在第二种情况下的结束位置，使用{}将变量封装在字符串中

echo "{$this->get_name['complete_name']} has been marked as Left!";

Answer 2

如果要获取数组偏移量，请使用：

{$this->get_name['complete_name']}

使用括号告诉PHP，如果可能的话，期望将整个包含用作变量。

有关详细信息，请参阅PHP's String Parsing。作为他们的例子的一部分，他们有这个例子：

// Works, quoted keys only work using the curly brace syntax
echo "This works: {$arr['key']}";

Answer 3

每当我回复比$complete_name更复杂的东西时，我都不会在引号中包含它：

echo $this->get_name['complete_name'].' has been marked as Left!';

我发现阅读整篇引文很容易，因为在处理对象和数组等时，句子会丢失。所以，如果你想轻松阅读引用行，我可能建议使用：

$complete_name = $this->get_name['complete_name'];   # deal with the dirty stuff here 

echo "$complete_name has been marked as left!";      # so this is much easier to read

php回音问题

3 个答案: