Switch PHP versions with Valet and Homebrew ^1.5

php-version-switch.md

Install latest

Uninstall older formula

brew uninstall php
brew uninstall php70
brew uninstall php56

Install php versions with recent Homebrew ^1.5

brew install php
brew install php@7.0
brew install php@5.6

Switch aliases

php-from-56() {
    valet stop;
    brew services stop php@5.6;
    brew unlink php@5.6;
    brew link --force php;
    brew services start php;
    composer global update;
    valet start;
}
php-to-56() {
    valet stop;
    brew services stop php;
    brew unlink php;
    brew link --force php@5.6;
    brew services start php@5.6;
    composer global update;
    valet start;
}
php-from-71() {
    valet stop;
    brew services stop php@7.1;
    brew unlink php@7.1;
    brew link --force php;
    brew services start php;
    composer global update;
    valet start;
}
php-to-71() {
    valet stop;
    brew services stop php;
    brew unlink php;
    brew link --force php@7.1;
    brew services start php@7.1;
    composer global update;
    valet start;
}

Extensions

Mcrypt is included by default in new 5.6 formula

Others extensions example

pecl uninstall -r imagick
pecl install imagick