优雅的换行解决方案（PHP）

发布于 2024-08-30 04:44:19 字数 198 浏览 14 评论 0原文

$var = "Hi there"."<br/>"."Welcome to my website"."<br/>;"
echo $var;

PHP 中有没有一种优雅的方式来处理换行符？我不确定其他语言，但 C++ 有 eol 所以使用起来更具可读性和优雅性？

谢谢

原文

$var = "Hi there"."<br/>"."Welcome to my website"."<br/>;"
echo $var;

Is there an elegant way to handle line-breaks in PHP? I'm not sure about other languages, but C++ has eol so something thats more readable and elegant to use?

Thanks

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渡你暖光 2024-09-06 04:44:19

对于换行符，PHP 为 "\n" （请参阅双引号字符串) 和 PHP_EOL 。

在这里，您使用的是，它不是 PHP 换行符：它是 HTML 换行符。

Here, you can simplify what you posted *(with HTML linebreaks)* : no need for the strings concatenations : you can put everything in just one string, like this :

$var = "Hi there<br/>Welcome to my website<br/>";

或者，使用 PHP 换行符：

$var = "Hi there\nWelcome to my website\n";

注意：您可能还想看看 nl2br( ) 函数，在 \n 之前插入。

For linebreaks, PHP as "\n" (see double quote strings) and PHP_EOL.

Here, you are using <br />, which is not a PHP line-break : it's an HTML linebreak.

Here, you can simplify what you posted *(with HTML linebreaks)* : no need for the strings concatenations : you can put everything in just one string, like this :

$var = "Hi there<br/>Welcome to my website<br/>";

Or, using PHP linebreaks :

$var = "Hi there\nWelcome to my website\n";

Note : you might also want to take a look at the nl2br() function, which inserts <br> before \n.

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○闲身 2024-09-06 04:44:19

我已经定义了：

if (PHP_SAPI === 'cli')
{
   define( "LNBR", PHP_EOL);
}
else
{
   define( "LNBR", "<BR/>");
}

此后，无论我想使用 \n ，都使用 LNBR 。

I have defined this:

if (PHP_SAPI === 'cli')
{
   define( "LNBR", PHP_EOL);
}
else
{
   define( "LNBR", "<BR/>");
}

After this use LNBR wherever I want to use \n.

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苯莒 2024-09-06 04:44:19

在 php 换行符中，我们可以使用 PHP_EOL (END of LINE) 。它作为“\n”
但它不能显示在 html 页面上。因为我们必须给 HTML 中断来中断行。

所以你可以使用定义来使用它

define ("EOL","<br>");

，然后你可以调用它

in php line breaks we can use PHP_EOL (END of LINE) .it working as "\n"
but it cannot be shown on the ht ml page .because we have to give HTML break to break the Line..

so you can use it using define

define ("EOL","<br>");

then you can call it

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小矜持 2024-09-06 04:44:19

我最终编写了一个到目前为止对我来说效果很好的函数：

// pretty print data
function out($data, $label = NULL) {

  $CLI = (php_sapi_name() === 'cli') ? 'cli' : '';

  $gettype = gettype($data);

  if (isset($label)) {
    if ($CLI) { $label = $label . ': '; }
    else { $label = '<b>'.$label.'</b>: '; }
  }

  if ($gettype == 'string' || $gettype == 'integer' || $gettype == 'double' || $gettype == 'boolean') {
    if ($CLI) { echo $label . $data . "\n"; }
    else { echo $label . $data . "<br/>"; }
  }
  else {
    if ($CLI) { echo $label . print_r($data,1) . "\n"; } 
    else { echo $label . "<pre>".print_r($data,1)."</pre>"; }
  }
}


// Usage

out('Hello world!');

$var = 'Hello Stackoverflow!';
out($var, 'Label');

I ended up writing a function that has worked for me well so far:

// pretty print data
function out($data, $label = NULL) {

  $CLI = (php_sapi_name() === 'cli') ? 'cli' : '';

  $gettype = gettype($data);

  if (isset($label)) {
    if ($CLI) { $label = $label . ': '; }
    else { $label = '<b>'.$label.'</b>: '; }
  }

  if ($gettype == 'string' || $gettype == 'integer' || $gettype == 'double' || $gettype == 'boolean') {
    if ($CLI) { echo $label . $data . "\n"; }
    else { echo $label . $data . "<br/>"; }
  }
  else {
    if ($CLI) { echo $label . print_r($data,1) . "\n"; } 
    else { echo $label . "<pre>".print_r($data,1)."</pre>"; }
  }
}


// Usage

out('Hello world!');

$var = 'Hello Stackoverflow!';
out($var, 'Label');

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你的往事 2024-09-06 04:44:19

不是很“优雅”并且有点浪费，但是如果您真的关心代码的样子，您可以制作自己的花哨标志，然后执行 str_replace。

Example:<br />
$myoutput =  "After this sentence there is a line break.<b>.|..</b> Here is a new line.";<br />
$myoutput =  str_replace(".|..","<br />",$myoutput);<br />

或者

how about:<br />
$myoutput =  "After this sentence there is a line break.<b>E(*)3</b> Here is a new line.";<br />
$myoutput =  str_replace("E(*)3","<br />",$myoutput);<br />

我将第一种方法称为“中指风格”，第二种方法为“山羊风格”。

Not very "elegant" and kinda a waste, but if you really care what the code looks like you could make your own fancy flag and then do a str_replace.

Example:<br />
$myoutput =  "After this sentence there is a line break.<b>.|..</b> Here is a new line.";<br />
$myoutput =  str_replace(".|..","<br />",$myoutput);<br />

how about:<br />
$myoutput =  "After this sentence there is a line break.<b>E(*)3</b> Here is a new line.";<br />
$myoutput =  str_replace("E(*)3","<br />",$myoutput);<br />

I call the first method "middle finger style" and the second "goatse style".

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秉烛思 2024-09-06 04:44:19

因为您要输出到浏览器，所以必须使用。否则有 \n 和 \r 或两者组合。

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一江春梦 2024-09-06 04:44:19

嗯，与任何语言一样，有多种方法可以做到这一点。

正如之前的回答者所提到的，“” 不是传统意义上的换行符，它是 HTML 换行符。我不知道是否有内置的 PHP 常量，但您始终可以定义自己的常量：

// Something like this, but call it whatever you like
const HTML_LINEBREAK = "<br/>";

如果您要输出一堆行（例如，从字符串数组），您可以这样使用它：

// Output an array of strings
$myStrings = Array('Line1','Line2','Line3');
echo implode(HTML_LINEBREAK,$myStrings);

但是，一般来说，我会说避免在 PHP echo/print 语句中对 HTML 进行硬编码。如果您可以将 HTML 保留在代码之外，从长远来看，它会使事情变得更加灵活和可维护。

Well, as with any language there are several ways to do it.

As previous answerers have mentioned, "<br/>" is not a linebreak in the traditional sense, it's an HTML line break. I don't know of a built in PHP constant for this, but you can always define your own:

// Something like this, but call it whatever you like
const HTML_LINEBREAK = "<br/>";

If you're outputting a bunch of lines (from an array of strings for example), you can use it this way:

// Output an array of strings
$myStrings = Array('Line1','Line2','Line3');
echo implode(HTML_LINEBREAK,$myStrings);

However, generally speaking I would say avoid hard coding HTML inside your PHP echo/print statements. If you can keep the HTML outside of the code, it makes things much more flexible and maintainable in the long run.

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