How to remove r n in php

How to remove r and n in php: 1. Use str_replace to replace rn newline; 2. Use regular replacement and remove newline; 3. Remove newline through "str_replace(PHP_EOL, '', $str);" .

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

Three methods of PHP removing line breaks code

<?php  
     //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(&#39;//s*/&#39;, &#39;&#39;, $str); 
    //3、使用php定义好的变量 （建议使用） 
    $str = str_replace(PHP_EOL, &#39;&#39;, $str);  
?>

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