sh ＃使用Homebrew（MacOSX）时快速更改P​​HP版本

Posted 2021-05-07

# Change PHP version rapidly when using Homebrew (MacOSX)

With Homebrew, sometimes you have many PHP versions installed.
I personally use EVERY php version to be sure every open-source project I have on my env works for every version.

This is why I have php 5.3, 5.4, 5.5, 5.6 and 7.0 installed with Homebrew.

Switching php versions is a pain when using homebrew, because you have to `brew unlink` the php versions used, and `brew link` the one you want.

Executing this script without argument shows all versions installed, and especially the current version.

Executing it with an argument will check a potential symlink in `/usr/local/bin/php{version}`
unlink all versions, and link the one you specified.

## Install

Execute this script to install `phpv`

```bash
sudo wget https://gist.githubusercontent.com/Pierstoval/1645a26ea5d2200642b6/raw/phpv.bash -O /usr/local/bin/phpv && sudo chmod +x /usr/local/bin/phpv && sudo chown `whoami` /usr/local/bin/phpv
```

## Usage:

* Show all versions installed:

  ```bash
  $ phpv
  
  Current:
  PHP 5.5.27 (cli) (built: Jul 14 2015 17:04:01)
  Copyright (c) 1997-2015 The PHP Group
  Zend Engine v2.5.0, Copyright (c) 1998-2015 Zend Technologies
      with Xdebug v2.3.3, Copyright (c) 2002-2015, by Derick Rethans

  PHP 7.0.0beta2 (cli) (built: Jul 24 2015 10:34:53)
  Copyright (c) 1997-2015 The PHP Group
  Zend Engine v3.0.0-dev, Copyright (c) 1998-2015 Zend Technologies
      with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2015, by Zend Technologies
  PHP 5.6.11 (cli) (built: Jul 30 2015 17:06:05) (DEBUG)
  Copyright (c) 1997-2015 The PHP Group
  Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies
      with Xdebug v2.3.3, Copyright (c) 2002-2015, by Derick Rethans
  PHP 5.5.27 (cli) (built: Jul 14 2015 17:04:01)
  Copyright (c) 1997-2015 The PHP Group
  Zend Engine v2.5.0, Copyright (c) 1998-2015 Zend Technologies
      with Xdebug v2.3.3, Copyright (c) 2002-2015, by Derick Rethans
  PHP 5.4.43 (cli) (built: Jul 14 2015 16:52:26)
  Copyright (c) 1997-2014 The PHP Group
  Zend Engine v2.4.0, Copyright (c) 1998-2014 Zend Technologies
      with Xdebug v2.3.3, Copyright (c) 2002-2015, by Derick Rethans
  PHP 5.3.29 (cli) (built: Jul 14 2015 16:39:57)
  Copyright (c) 1997-2014 The PHP Group
  Zend Engine v2.3.0, Copyright (c) 1998-2014 Zend Technologies
      with Xdebug v2.2.7, Copyright (c) 2002-2015, by Derick Rethans
  ```

* Switch to another version:

  ```bash
  $ phpv 54
  phpv
  Switch to /usr/local/bin/php54
  Unlinking /usr/local/Cellar/php53/5.3.29_2... 0 symlinks removed
  Unlinking /usr/local/Cellar/php54/5.4.43_2... 0 symlinks removed
  Unlinking /usr/local/Cellar/php55/5.5.27_2... 0 symlinks removed
  Unlinking /usr/local/Cellar/php56/5.6.11_2... 38 symlinks removed
  Unlinking /usr/local/Cellar/php70/7.0.0-beta.2... 0 symlinks removed
  Linking /usr/local/Cellar/php54/5.4.43_2... 40 symlinks created
  PHP 5.4.43 (cli) (built: Jul 14 2015 16:52:26)
  Copyright (c) 1997-2014 The PHP Group
  Zend Engine v2.4.0, Copyright (c) 1998-2014 Zend Technologies
      with Xdebug v2.3.3, Copyright (c) 2002-2015, by Derick Rethans
  ```

Plus, for convenience, it's awesome to have a symlink for every PHP version pointing to `/usr/local/opt/php/{version}/bin/php`.

But you're lucky: the script can generate them automatically if it detects that a specific version of PHP is installed and if the symlink is not created.

Else, you can do it yourself by executing this script:

```bash
sudo ln -s /usr/local/opt/php53/bin/php /usr/local/bin/php53 && sudo chmod +x /usr/local/bin/php53
sudo ln -s /usr/local/opt/php54/bin/php /usr/local/bin/php54 && sudo chmod +x /usr/local/bin/php54
sudo ln -s /usr/local/opt/php55/bin/php /usr/local/bin/php55 && sudo chmod +x /usr/local/bin/php55
sudo ln -s /usr/local/opt/php56/bin/php /usr/local/bin/php56 && sudo chmod +x /usr/local/bin/php56
sudo ln -s /usr/local/opt/php70/bin/php /usr/local/bin/php70 && sudo chmod +x /usr/local/bin/php70
```

Then, you can execute any of the php version directly in command line by executing the so-called version:

```bash
$ php53 -v
PHP 5.3.29 (cli) (built: Jul 14 2015 16:39:57)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2014 Zend Technologies
    with Xdebug v2.2.7, Copyright (c) 2002-2015, by Derick Rethans
```

And you can do the same for every version.

#!/bin/bash

# Use:
# $ phpv
# > Will return current global php version, and ALL php versions symlinked
#
# $ phpv {version}
# > Will "brew unlink" all versions, and "brew link php{version}"

# View README file for more info

if [[ ! -f "/usr/local/bin/php53" && -f "/usr/local/opt/php53/bin/php" ]]; then
    echo "Creating symlink for php 5.3"
    sudo ln -s /usr/local/opt/php53/bin/php /usr/local/bin/php53 && sudo chmod +x /usr/local/bin/php53
fi
if [[ ! -f "/usr/local/bin/php54" && -f "/usr/local/opt/php54/bin/php" ]]; then
    echo "Creating symlink for php 5.4"
    sudo ln -s /usr/local/opt/php54/bin/php /usr/local/bin/php54 && sudo chmod +x /usr/local/bin/php54
fi
if [[ ! -f "/usr/local/bin/php55" && -f "/usr/local/opt/php55/bin/php" ]]; then
    echo "Creating symlink for php 5.5"
    sudo ln -s /usr/local/opt/php55/bin/php /usr/local/bin/php55 && sudo chmod +x /usr/local/bin/php55
fi
if [[ ! -f "/usr/local/bin/php56" && -f "/usr/local/opt/php56/bin/php" ]]; then
    echo "Creating symlink for php 5.6"
    sudo ln -s /usr/local/opt/php56/bin/php /usr/local/bin/php56 && sudo chmod +x /usr/local/bin/php56
fi
if [[ ! -f "/usr/local/bin/php70" && -f "/usr/local/opt/php70/bin/php" ]]; then
    echo "Creating symlink for php 7.0"
    sudo ln -s /usr/local/opt/php70/bin/php /usr/local/bin/php70 && sudo chmod +x /usr/local/bin/php70
fi

if [ -z "$1" ]; then
    echo "Current:"
    php -v
    echo ""
    if [[ -f "/usr/local/opt/php70/bin/php" ]]; then /usr/local/opt/php70/bin/php -v ; fi
    if [[ -f "/usr/local/opt/php56/bin/php" ]]; then /usr/local/opt/php56/bin/php -v ; fi
    if [[ -f "/usr/local/opt/php55/bin/php" ]]; then /usr/local/opt/php55/bin/php -v ; fi
    if [[ -f "/usr/local/opt/php54/bin/php" ]]; then /usr/local/opt/php54/bin/php -v ; fi
    if [[ -f "/usr/local/opt/php53/bin/php" ]]; then /usr/local/opt/php53/bin/php -v ; fi
else
    if [[ -f "/usr/local/opt/php$1/bin/php" ]]; then
        echo "Switch to /usr/local/opt/php$1/bin/php"
        if [[ -f "/usr/local/opt/php70/bin/php" ]]; then brew unlink php70 ; fi
        if [[ -f "/usr/local/opt/php56/bin/php" ]]; then brew unlink php56 ; fi
        if [[ -f "/usr/local/opt/php55/bin/php" ]]; then brew unlink php55 ; fi
        if [[ -f "/usr/local/opt/php54/bin/php" ]]; then brew unlink php54 ; fi
        if [[ -f "/usr/local/opt/php53/bin/php" ]]; then brew unlink php53 ; fi
        brew link "php$1"
        php -v
    else
        echo "Php version $1 does not exist."
    fi
fi