Link the php installed by Brew to ~/.phpenv/versions

link-phps.bash

#!/usr/bin/env bash

set -au

# Check cellar dir
cellarDir=$(brew --prefix)/Cellar
if [ ! -d "$cellarDir" ]; then
  echo "Not found. brew package path $cellarDir :("
  echo
  exit 1
fi

# Unlink all link files
find ~/.phpenv/versions -type l -exec unlink {} \;

parentDirs=$(find $cellarDir/php* -type d -maxdepth 0)
echo "# Link the php installed by Brew to ~/.phpenv/versions"
for parentDir in $parentDirs
do
  childDirs=$(find "$parentDir"/* -type d -maxdepth 0)
  for childDir in $childDirs
  do
    phpPath=$childDir/bin/php
    if [ ! -f "$phpPath" ]; then
      continue
    fi
    major=$($phpPath -d error_reporting=0 -r 'echo PHP_MAJOR_VERSION;')
    minor=$($phpPath -d error_reporting=0 -r 'echo PHP_MINOR_VERSION;')
    patch=$($phpPath -d error_reporting=0 -r 'echo PHP_RELEASE_VERSION;')

    # link major.minor
    linkCommand="ln -s $childDir $HOME/.phpenv/versions/$major.$minor"
    echo "$linkCommand"
    $linkCommand
    
    # link major.minor.patch
    linkCommand="ln -s $childDir $HOME/.phpenv/versions/$major.$minor.$patch"
    echo "$linkCommand"
    $linkCommand
  done
done

# Usage
curl -fsSL https://gist.githubusercontent.com/yuki777/6244823b8aa8cf4457e97e6407ada5ad/raw/2a2f0ff6b295c5075216b3e4cfc3e0b3b37af6af/link-phps.bash | bash

# Tests
mkdir -p /tmp/php74 /tmp/php80 /tmp/php81
cd /tmp         && phpenv global 8.1    && php -v # It should be 8.1
cd /tmp/php74   && phpenv local  7.4    && php -v # It should be 7.4
cd /tmp/php80   && phpenv local  8.0    && php -v # It should be 8.0
cd /tmp/php81   && phpenv local  8.1    && php -v # It should be 8.1

Very cool, thank you!