Use line breaks in PHP code and (\ n or \ r \ n and BR) applications

The browser cannot recognize\ nor \ r\ n, these two line breaks are text line breaks, text files are valid, if you need to output the results to a browser or print to a display, use BR in your code, or if you are just wrapping in the source code, use\ nor \ r\ n, interested friends can understand, maybe learn from youPHPHelpful

Analysis: The browser does not recognize\ nor \ r\ n, these two newline characters are text line breaks, text files are valid; Viewing HTML source code in a Web page can find that code B successfully implements a line break
Summary: If you need to output the results to a browser or print to a display, use </br>; in code if you just wrap in the source code, use the\ nor \ r\ n