blocks|key|1291384|text|不会，因为单引号甚至会阻止十六进制代码的替换。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1291385|echo+'Hello,+world!'+.+"\xA";|code-block|syntax|javascript|1291386|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

No, because single-quotes even inhibit hex code replacement.

<pre><code>echo 'Hello, world!' . "\xA";
</code></pre>

blocks|key|1076731|text|echo+'hollow+world'+.+PHP_EOL;|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1076732|使用常量PHP_EOL，那么它也是独立于操作系统的。|unstyled|1076733|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>echo 'hollow world' . PHP_EOL;
</code></pre>

Use the constant PHP_EOL then it is OS independent too.

blocks|key|1291459|text|如果你正在通过echo连接到浏览器，你可以在你的语句中使用 ：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1291460|echo+'Will+print+a+newline ';
echo+'But+this+wont!';|code-block|syntax|javascript|1291461|entityMap^0|7|4|T|5|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

If you are <code>echo</code>ing to a browser, you can use <code>&lt;br/&gt;</code> with your statement:

<pre><code>echo 'Will print a newline&lt;br/&gt;';
echo 'But this wont!';
</code></pre>

blocks|key|1076693|text|仅供参考，可以将换行符放入不带双引号的字符串中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1076694|printf('Please%251$sgive%251$sme%251$snewlines%251$s',+PHP_EOL);|code-block|syntax|javascript|1076695|如果你对双引号的非理性恐惧没有界限，这可能会很有用。尽管我担心这种治疗方法可能比疾病更糟糕。|1076696|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

FYI it is possible to get newlines into strings without double quotes:

<pre><code>printf('Please%1$sgive%1$sme%1$snewlines%1$s', PHP_EOL);
</code></pre>

Which may be useful If your irrational fear of double quotes knows no bounds. Though I fear this cure may be worse than the disease.

blocks|key|1291600|text|您可以在单引号中使用的唯一转义序列是单引号本身。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1291601|$foo+=+'That\'s+great';|code-block|syntax|javascript|1291602|在使用单引号创建的字符串中插入新行的唯一方法是插入一个文字换行符|1291603|$bar+=+'That\'s
cheating';|1291604|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

The only escape sequence you can use in single quotes is for the single quote itself.

<pre><code>$foo = 'That\'s great';
</code></pre>

The only way you could insert a new line into a string created with single quotes is to insert a literal newline

<pre><code>$bar = 'That\'s
cheating';
</code></pre>

blocks|key|1291778|text|我想知道为什么没有人添加使用函数chr()的替代方法|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1291779|echo+'Hello+World!'+.+chr(10);|code-block|syntax|javascript|1291780|或者，如果你要重复一百万次，效率会更高：|1291781|define('C_NewLine',+chr(10));
...
echo+'Hello+World!'+.+C_NewLine;|1291782|这避免了连接单引号和双引号字符串的愚蠢表示法。|1291783|entityMap^0|G|5|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|Y|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|R|$]]

I wonder why no one added the alternative of using the function <code>chr()</code>:

<pre><code>echo 'Hello World!' . chr(10);
</code></pre>

or, more efficient if you're going to repeat it a million times:

<pre><code>define('C_NewLine', chr(10));
...
echo 'Hello World!' . C_NewLine;
</code></pre>

This avoids the silly-looking notation of concatenating a single- and double-quoted string.

blocks|key|1076537|text|您可能需要考虑使用<<<|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1076538|例如：|1076539|<<<VARIABLE
this+is+some
random+text
that+I'm+typing+
here+and+I+will+end+it+with+the+
same+word+I+started+it+with
VARIABLE|code-block|syntax|javascript|1076540|更多信息请访问：http://php.net/manual/en/language.types.string.php|offset|length|1076541|顺便说一句，有些编码环境不知道如何处理上面的语法。|1076542|entityMap|0|LINK|mutability|MUTABLE|url|http://php.net/manual/en/language.types.string.php^0|0|0|0|8|1E|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@$K|10|L|11|1|12]]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

You may want to consider using &lt;&lt;&lt;

e.g. 

<pre><code>&lt;&lt;&lt;VARIABLE
this is some
random text
that I'm typing 
here and I will end it with the 
same word I started it with
VARIABLE
</code></pre>

More info at: <a href="http://php.net/manual/en/language.types.string.php" rel="nofollow noreferrer">http://php.net/manual/en/language.types.string.php</a>

Btw - Some Coding environments don't know how to handle the above syntax.

blocks|key|1291723|text|您可以使用以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1291724|echo+'Hello+World'+.+"\n";|code-block|syntax|javascript|1291725|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can use this:

<pre><code>echo 'Hello World' . "\n";
</code></pre>

blocks|key|1076880|text|这对我来说效果很好：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1076881|print_r('Hello+world'.PHP_EOL);|code-block|syntax|javascript|1076882|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This worked well for me:

<pre><code>print_r('Hello world'.PHP_EOL);
</code></pre>

blocks|key|1076782|text|如果你有一个变量：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1076783|$your_var+=+'declare+your+var';
echo+'i+want+to+show+my+var+here'.$your_var.' ';|code-block|syntax|javascript|1076784|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

in case you have a variable : 

<pre><code>$your_var = 'declare your var';
echo 'i want to show my var here'.$your_var.'&lt;br&gt;';
</code></pre>

I try to use single quotes as much as possible and I've noticed that I can't use \n in single quotes. I know I can just enter a newline literally by pressing return, but that screws up the indentation of my code.

Is there some ASCII character or something that I can type that will produce newline when I'm using single quotes?

Print newline in PHP in single quotes

我尽可能多地使用单引号，但我注意到我不能在单引号中使用\n。我知道我可以通过按return键直接输入一个换行符，但这会破坏代码的缩进。有没有一些ASCII字符或我可以输入的东西，当我使用单引号时会产生换行符？

问在PHP中用单引号打印换行符
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回答 10

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