PHP：尝试用“\n”创建一个新行
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PHP: trying to create a new line with "\n"
提问by ziiweb
i'm writing this:
我在写这个：
echo "foo";
echo "\n";
echo "bar";
and "bar" is not written in the line below.
并且“bar”没有写在下面的行中。
What am i doing wrong?
我究竟做错了什么？
Javi
哈维
回答by Tomalak
Newlines in HTML are expressed through <br>, not through \n.
HTML 中的换行符是通过 来表示的<br>，而不是通过\n。
Using \nin PHP creates a newline in the source code, and HTML source code layout is unconnected to HTML screen layout.
\n在 PHP 中使用会在源代码中创建一个换行符，并且 HTML 源代码布局与 HTML 屏幕布局无关。
回答by Cups
If you want a new line character to be inserted into a plain text stream then you could use the OS independent global PHP_EOL
如果您希望将换行符插入纯文本流中，则可以使用独立于操作系统的全局 PHP_EOL
echo "foo";
echo PHP_EOL ;
echo "bar";
In HTML terms you would see a newline between foo and bar if you looked at the source code of the page.
在 HTML 术语中，如果您查看页面的源代码，您会在 foo 和 bar 之间看到换行符。
ergo, it is useful if you are outputting say, a loop of values for a select box and you value having html source code which is "prettier" or easier to read for yourself later. e.g.
因此，如果您要输出一个选择框的值循环，并且您重视拥有“更漂亮”或更易于以后自己阅读的 html 源代码，这将很有用。例如
foreach( $dogs as $dog )
echo "<option>$dog</option>" . PHP_EOL ;
回答by Yacoby
If you want to write plain text, you must ensure the content type is set to Content-Type: text/plain. Example:
如果要编写纯文本，则必须确保将内容类型设置为Content-Type: text/plain。例子：
header('Content-Type: text/plain');
If you are dealing with HTML, you have two options. One is to inset a new line using <br>(Or <br />for XHTML). The other is to put the plain text in a <pre>element (In this case "pre" stands for preformatted).
如果您正在处理 HTML，您有两种选择。一种是使用<br>(Or <br />for XHTML)插入一个新行。另一种是将纯文本放在一个<pre>元素中（在这种情况下，“pre”代表预格式化）。
回答by Daniel A. White
PHP generates HTML. You may want:
PHP 生成 HTML。你可能想要：
echo "foo";
echo "<br />\n";
echo "bar";
回答by Andrei R
if your text has newlines, use nl2br php function:
如果您的文本有换行符，请使用 nl2br php 函数：
<?php
$string = "foo"."\n"."bar";
echo nl2br($string);
?>
This should look good in browser
这在浏览器中应该看起来不错
回答by Mark Elliot
Assuming you're viewing the output in a web browser you have at least two options:
假设您在 Web 浏览器中查看输出，您至少有两个选择：
Surround your text block with
<pre>statementsChange your
\nto an HTML<br>tag (<br/>will also do)
用
<pre>语句包围你的文本块将您更改
\n为 HTML<br>标记（<br/>也可以）
回答by flau
Since it wasn't mentioned, you can also use the CSS white-space property
由于未提及，您还可以使用 CSS white-space 属性
body{
white-space:pre-wrap;
}
Which tells the browser to preserve whitespace so that
这告诉浏览器保留空格，以便
<body>
<?php
echo "hello\nthere";
?>
</body>
Would display
会显示
hello
there
回答by rashedcs
We can use \n as a new line in php.
我们可以在 php 中使用 \n 作为新行。
Code Snippet :
代码片段：
<?php
echo"Fo\n";
echo"Pro";
?>
Output:
输出：
Fo
Pro
佛
临
回答by eeyore
This answer was so obvious and it took me forever to figure out:
这个答案太明显了，我花了很长时间才弄明白：
echo "foo
bar";
I know that looks like it's wrapping. It's not. What I did is I literally hit returnhalfway through the string, between fooand bar. It creates a new line in the HTML source and makes your PHP look horrible. This was in Linux/Apache.
我知道这看起来像是在包装。它不是。我所做的是return在字符串的中途，在foo和之间bar。它在 HTML 源代码中创建了一个新行，并使您的 PHP 看起来很糟糕。这是在 Linux/Apache 中。
回答by Matt
It will be written on a new line if you examine the source code of the page. If you want it to appear on a new line when it is rendered in the browser, you'll have use a <br />tag instead.
如果您检查页面的源代码，它将被写在一个新行上。如果您希望它在浏览器中呈现时显示在新行上，则可以改用<br />标签。
