How to use newline character in PHP? (code example)
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。
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):
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:
源代码查看:
以上就是本篇文章的全部内容,希望能对大家的学习有所帮助。更多精彩内容大家可以关注php中文网相关教程栏目!!!
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