What is the relationship between PHP in xdebug-* and PHP in MacOS?

I'm trying to install xDebug as per the steps on this page, but it doesn't seem quite understandable after & quot; brewinstallphp54-xdebug & quot. I understand this step. xdebug is installed on the PHP that comes with Mac, but the following steps start to operate on the MAMP: c... i'm trying to install xDebug as per the steps on this page, but it doesn't seem quite understandable after the "brew install php54-xdebug" step.
I understand this step. xdebug is installed on the PHP that comes with Mac, but the following steps start to operate on the MAMP:

Cd/Applications/MAMP/bin/php/php5.4.4/lib/php/extensions/no-debug

Why? Is it because the PHP in Mac comes with the same thing as the PHP In MAMP?

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I'm trying to install xDebug as per the steps on this page, but it doesn't seem quite understandable after the "brew install php54-xdebug" step.
I understand this step. xdebug is installed on the PHP that comes with Mac, but the following steps start to operate on the MAMP:

Cd/Applications/MAMP/bin/php/php5.4.4/lib/php/extensions/no-debug

Why? Is it because the PHP in Mac comes with the same thing as the PHP In MAMP?

It does not matter.
Two php versions exist in the system at the same time. The default version is the php version that comes with the system. Then you have installed MAMP, which contains a php version, but only modifies the PATH of the system PATH, will first find the MAMP php