php 字符串中的n换行符无效、不能换行的解决方法_PHP
例如下面的代码:
复制代码 代码如下:echo 'hello\n';
echo 'world';
?>
程序的中的换行符\n会直接输出,无法正确换行,解决方法是把单引号改为双引号:
复制代码 代码如下:echo "hello\n";
echo "world";
?>
这样就可以了!其实就是PHP的双引号和单引号的区别问题,简单个概括下双引号中的变量可以解析,单引号就是绝对的字符串。
附:PHP去除换行的三种方法代码
复制代码 代码如下: //php 不同系统的换行
//不同系统之间换行的实现是不一样的
//linux 与unix中用 /n
//MAC 用 /r
//window 为了体现与linux不同 则是 /r/n
//所以在不同平台上 实现方法就不一样
//php 有三种方法来解决
//1、使用str_replace 来替换换行
$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);
?>

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