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HomeBackend DevelopmentPHP TutorialHow to use newline character in PHP? (code example)

How to use newline character in PHP? (code example)

Feb 19, 2019 pm 03:43 PM
phpnewline character

在PHP脚本中有时需要进行换行输出,那么如何进行换行?下面本篇文章就来给大家介绍一下在PHP中如何使用换行符进行换行,希望对大家有所帮助。

How to use newline character in PHP? (code example)

方法一:使用PHP换行符

换行符是用于逃避继续使用相同行的分隔符。这是为了将冗长的线分成小的,易读的块,逐行显示。PHP允许通过使用转义序列或预定义常量来添加这些换行符,如下所示:

1、\n(或 \r\n)换行:这是在内容之间添加实际换行符的PHP转义序列之一。

2、PHP_EOL:此预定义常量用作行尾的表示,从而可以进行换行。

注意:这两种PHP转义符号仅在双引号内有效。如果我们有单引号括起来的内容,那么我们应该像往常一样按Enter键来指定换行符。例如,

$content = 'PHP换行符 
由转义序列添加
工作正常' ;

但是,在单引号内,我们只能使用静态数据。相反,如果我们想要动态插值PHP变量,那么我们需要使用双引号。

PHP换行符的使用示例

<?php 
$content1 = "PHP换行符\r\n由转义序列添加\n工作正常\n\n";// OR 
$content2 = "PHP换行符".PHP_EOL ."通过PHP_EOL添加" .PHP_EOL ."工作正常";
echo $content1 ; 
echo $content2 ; 
?>

效果图(查看源代码):

How to use newline character in PHP? (code example)

在上面的代码中,我们可以注意到\n(或 \r\n)是在没有任何PHP点(.)分隔符的情况下使用,而在使用PHP_EOL作为换行符时需要它来识别它是PHP预定义常量。

注:PHP换行符只会使源代码换行,而浏览器显示的内容不换行;

方法二、使用HTML换行符

在PHP中,HTML代码会被当成字符串,然后在浏览器中被解析。而
可以使浏览器显示的内容换行,但源代码不换行。

<?php 
$content= "PHP使用<br>换行<br>工作正常";// OR 
echo $content ; 
?>

效果图:

浏览器查看:

How to use newline character in PHP? (code example)

源代码查看:

How to use newline character in PHP? (code example)

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