PHP_EOL newline parsing in php

When I read the manual, I found the variable PHP_EOL. After checking the information, it turned out that it is equivalent to the newline character. In PHP, PHP_EOL can be used instead to improve the source code level portability of the code.

Use in unix series\n
Use in windows series\r\n
Use in mac\r
PHP_EOL can be used instead in PHP to improve the source code level portability of the code

For example:

##Copy code The code is as follows:

 echo PHP_EOL;
       //windows平台相当于    echo "\r\n";
       //unix\linux平台相当于    echo "\n";
       //mac平台相当于    echo "\r";

We can use the function get_defined_constants() to get all PHP constants.

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