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PHP怎么去除字符串中的换行符?

Jun 13, 2016 am 11:18 AM
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PHP去除字符串中换行符的方法:1、使用“str_replace”函数来替换换行符;2、使用正则替换;3、使用php定义好的变量去除字符串中的换行符。

PHP怎么去除字符串中的换行符?

一个小小的换行,其实在不同的平台有着不同的实现:

在unix世界换行就用/n来代替,但是windows为了体现他的不同,就用/r/n,更有意思的是在mac中用/r。

因此unix系列用 /n,windows系列用 /r/n,mac用 /r,这样在不同平台上 实现方法就不一样

PHP怎么去除字符串中的换行符?

1、使用str_replace 来替换换行符

$str = str_replace(array("/r/n", "/r", "/n"), "", $str);

2、使用正则替换

$str = preg_replace('//s*/', '', $str);

3、使用php定义好的变量 (建议使用)

$str = str_replace(PHP_EOL, '', $str);

PHP_EOL是一个些已经定义好的变量,代表php的换行符,这个变量会根据平台而变,在windows下会是/r/n,在linux下是/n,在mac下是/r.换行就按下面的就可以了。

$str = str_replace(PHP_EOL, '', $str);

正则替换:

preg_replace("/(^[\s]+[\s]+$  )/", &#39;&#39;, $str); <br><br>

拓展:

关于\n,\r,\t

  • \n 软回车: 在Windows 中表示换行且回到下一行的最开始位置 ,在Linux、unix 中只表示换行,但不会回到下一行的开始位置。

  • \r 软空格: 在Linux、unix 中表示返回到当行的最开始位置。 在Mac OS 中表示换行且返回到下一行的最开始位置,相当于Windows 里的 \n 的效果。

  • \t 跳格(移至下一列)

几点说明:

它们在双引号或定界符表示的字符串中有效,在单引号表示的字符串中无效。

\r\n 一般一起用,用来表示键盘上的回车键(Linux,Unix中),也可只用 \n(Windwos中),在Mac OS中用\r表示回车。

\t表示键盘上的“TAB”键。

文件中的换行符号:windows : \n,linux,unix: \r\n

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