A deep dive into the '<br />' and &q_PHP tutorials

rn is the line break of the output HTML code, and the effect seen by the customer does not have line breaks.

On the contrary
Effect:
I am the contentrnI am the content
I am the content
I am content
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r means: carriage return character (ACSII: 13 or 0x0d), which is what we often call a hard carriage return.
n means: line feed (ACSII: 10 or 0x0a), which is what we often call soft return.

The effect of these two cannot be seen on the page. Right-click the source file to see the code line break
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If it is output to the browser, use

If you are outputting to your own file, use "n", under windows it is "rn"
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n, just like you create a web page in DreamWeaver, in Press Enter in the source code to wrap the source code in a new line.
is an output (HTML markup language), which is interpreted in HTML as a newline for the input word. The function of n is to break the line in the source code. After inputting it, if you check the HTML source code, you will see that there is a line break. However, the HTML interpreter (browser) thinks it is useless and displays it the same whether it is used or not.
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n is the source code line break!

is the web page performance line break!!
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Attachment: Detailed explanation of PHP nl2br() formatted output

http://www.bkjia.com/PHPjc/327306.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/327306.htmlTechArticlern is the line break of the output HTML code, and the effect seen by the customer does not have line breaks. br /The opposite effect: I am the contentrnI am the content I am the contentbr /I am the content============================...