Three ways to remove carriage return and line feed in PHP

Three ways to remove carriage return and line feed in PHP

  //php Line breaks in different systems
 //The implementation of line breaks in different systems is different
 //Use n in linux and unix
 //Use r in MAC
 //window for The difference from Linux is rn
 //So the implementation method is different on different platforms
 //php has three methods to solve

 //1. Use str_replace to replace newlines
 $str = str_replace(array("rn ", "r", "n"), "", $str);

 //2. Use regular replacement
 $str = preg_replace('//s*/', '', $str);

 //3. Use variables defined by PHP (recommended)
 $str = str_replace(PHP_EOL, '', $str);
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