Use of line breaks in PHP code and (n or RN and BR) applications

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

Code B: 
 
  

Analysis : The browser does not recognize \ n or \ 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 the
If you are just wrapping in the source code, use the \ n or \ r \ n

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