brew doctor throwing loads of errors?

Question

I recently installed Laravel on my Mac to begin learning about it as I've heard good things.

My first error was while accessing /public/:

Laravel requires the Mcrypt PHP extension.

I then installed php54-mcrypt and continued learning yesterday evening.

I then came home today from work, hit 'brew update' and then the same error appeared?

I then ran brew install php54-mcrypt to receive:

Warning: php54-mcrypt-5.4.16 already installed

I then ran brew doctor to receive;

Warning: "config" scripts exist outside your system or Homebrew directories ./configure scripts often look for *-config scripts to determine if software packages are installed, and what additional flags to use when compiling and linking.

Having additional scripts in your path can confuse software installed via Homebrew if the config script overrides a system or Homebrew provided script of the same name. We found the following "config" scripts:

/opt/sm/pkg/active/bin/curl-config
/opt/sm/pkg/active/bin/ncurses5-config
/opt/sm/pkg/active/bin/ncursesw5-config
/opt/sm/pkg/active/bin/pkg-config
/opt/sm/pkg/active/bin/xml2-config
/opt/sm/pkg/active/bin/xslt-config
PHP Warning:  PHP Startup: Unable to load dynamic library
'/usr/local/Cellar/php54-mcrypt/5.4.16/mcrypt.so' - 
dlopen(/usr/local/Cellar/php54-mcrypt/5.4.16/mcrypt.so, 9): 
Library not loaded: /usr/local/lib/libmcrypt.4.4.8.dylib
Referenced from: /usr/local/Cellar/php54-mcrypt/5.4.16/mcrypt.so
Reason: image not found in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 
'/usr/local/Cellar/php54-mcrypt/5.4.16/mcrypt.so' - 
dlopen(/usr/local/Cellar/php54-mcrypt/5.4.16/mcrypt.so, 9): 
Library not loaded: /usr/local/lib/libmcrypt.4.4.8.dylib
Referenced from: /usr/local/Cellar/php54-mcrypt/5.4.16/mcrypt.so
Reason: image not found in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 
'/usr/local/Cellar/php54-mcrypt/5.4.16/mcrypt.so' - 
dlopen(/usr/local/Cellar/php54-mcrypt/5.4.16/mcrypt.so, 9): 
Library not loaded: /usr/local/lib/libmcrypt.4.4.8.dylib
Referenced from: /usr/local/Cellar/php54-mcrypt/5.4.16/mcrypt.so
Reason: image not found in Unknown on line 0

Answer 1

The stuff in /usr/local/Cellar was put there by MacPorts, an earlier package manager for mac. You probably want to remove that. https://guide.macports.org/chunked/installing.macports.uninstalling.html