Linux-Why add a backslash to a command that compiles PHP

./configure  --prefix=/usr/local/fastphp \--with-mysql=mysqlnd \--enable-mysqlnd \--with-gd \--enable-gd-native-ttf \--enable-gd-jis-conv--enable-fpm

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./configure  --prefix=/usr/local/fastphp \--with-mysql=mysqlnd \--enable-mysqlnd \--with-gd \--enable-gd-native-ttf \--enable-gd-jis-conv--enable-fpm

This is called a continuation character, you understand.

That's the continuation of the C line.
C language statements to end, not in the unit of behavior, so C code format is more flexible, as long as the space can be separated by the middle of the code can be arbitrary line, only the macro definition can be too long, write to a line too long, not easy to see, you can use \ Under normal circumstances can be separated by the space between the line.

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