Wie kann ich PHP-Versionen unter Mac OSX nahtlos wechseln?

#!/bin/bash

# Helper function to unlink an installed PHP version
unlink_php() {
  local php_version=""
  echo "Unlinking PHP $php_version..."
  brew unlink "php@$php_version"
}

# Helper function to link an installed PHP version
link_php() {
  local php_version=""
  echo "Linking PHP $php_version..."
  brew link "php@$php_version"
}

# Main function to switch PHP version
switch_php() {
  local desired_version=""
  if brew ls --versions "php@$desired_version" >/dev/null; then
    unlink_php current
    link_php "$desired_version"
    echo "PHP successfully switched to version $desired_version."
  else
    echo "PHP version $desired_version is not installed."
  fi
}

# Usage: switch-php <version>
# Example: switch-php 7.4

if [[ $# -ne 1 ]]; then
  echo "Usage: switch-php <version>"
  exit 1
fi

local current=$(php -v | grep 'PHP' | cut -d' ' -f2 | cut -d'.' -f1,2)
local chosen=""

switch_php "$chosen"

bash switch-php.sh <version>

bash switch-php.sh 7.4