diff --git a/src/scripts/common.sh b/src/scripts/common.sh
new file mode 100644
index 00000000..1e9b67ca
--- /dev/null
+++ b/src/scripts/common.sh
@@ -0,0 +1,251 @@
+# Variables
+export tick="✓"
+export cross="✗"
+export curl_opts=(-sL)
+export nightly_versions="8.[0-1]"
+export old_versions="5.[3-5]"
+export tool_path_dir="/usr/local/bin"
+export composer_bin="$HOME/.composer/vendor/bin"
+export composer_json="$HOME/.composer/composer.json"
+export latest="releases/latest/download"
+export github="https://github.com/shivammathur"
+export bintray="https://dl.bintray/shivammathur"
+
+# Function to log start of a operation.
+step_log() {
+  message=$1
+  printf "\n\033[90;1m==> \033[0m\033[37;1m%s\033[0m\n" "$message"
+}
+
+# Function to log result of a operation.
+add_log() {
+  mark=$1
+  subject=$2
+  message=$3
+  if [ "$mark" = "$tick" ]; then
+    printf "\033[32;1m%s \033[0m\033[34;1m%s \033[0m\033[90;1m%s\033[0m\n" "$mark" "$subject" "$message"
+  else
+    printf "\033[31;1m%s \033[0m\033[34;1m%s \033[0m\033[90;1m%s\033[0m\n" "$mark" "$subject" "$message"
+    [ "$fail_fast" = "true" ] && exit 1;
+  fi
+}
+
+# Function to log result of installing extension.
+add_extension_log() {
+  extension=$1
+  status=$2
+  extension_name=$(echo "$extension" | cut -d '-' -f 1)
+  (
+    check_extension "$extension_name" && add_log "$tick" "$extension_name" "$status"
+  ) || add_log "$cross" "$extension_name" "Could not install $extension on PHP ${semver:?}"
+}
+
+# Function to read env inputs.
+read_env() {
+  [[ -z "${update}" ]] && update='false' && UPDATE='false' || update="${update}"
+  [ "$update" = false ] && [[ -n ${UPDATE} ]] && update="${UPDATE}"
+  [[ -z "${runner}" ]] && runner='github' && RUNNER='github' || runner="${runner}"
+  [ "$runner" = false ] && [[ -n ${RUNNER} ]] && runner="${RUNNER}"
+  [[ -z "${fail_fast}" ]] && fail_fast='false' || fail_fast="${fail_fast}"
+}
+
+# Function to download a file using cURL.
+# mode: -s pipe to stdout, -v save file and return status code
+# execute: -e save file as executable
+get() {
+  mode=$1
+  execute=$2
+  file_path=$3
+  shift 3
+  links=("$@")
+  if [ "$mode" = "-s" ]; then
+    sudo curl "${curl_opts[@]}" "${links[0]}"
+  else
+    for link in "${links[@]}"; do
+      status_code=$(sudo curl -w "%{http_code}" -o "$file_path" "${curl_opts[@]}" "$link")
+      [ "$status_code" = "200" ] && break
+    done
+    [ "$execute" = "-e" ] && sudo chmod a+x "$file_path"
+    [ "$mode" = "-v" ] && echo "$status_code"
+  fi
+}
+
+# Function to download and run scripts from GitHub releases with bintray fallback.
+run_script() {
+  repo=$1
+  shift
+  args=("$@")
+  get -q -e /tmp/install.sh "$github/$repo/$latest/install.sh" "$bintray/php/$repo.sh"
+  bash /tmp/install.sh "${args[@]}"
+}
+
+# Function to install required packages on self-hosted runners.
+self_hosted_setup() {
+  if [ "$runner" = "self-hosted" ]; then
+    if [[ "${version:?}" =~ $old_versions ]]; then
+      add_log "$cross" "PHP" "PHP $version is not supported on self-hosted runner"
+      exit 1
+    else
+      self_hosted_helper >/dev/null 2>&1
+    fi
+  fi
+}
+
+# Function to test if extension is loaded.
+check_extension() {
+  extension=$1
+  if [ "$extension" != "mysql" ]; then
+    php -m | grep -i -q -w "$extension"
+  else
+    php -m | grep -i -q "$extension"
+  fi
+}
+
+# Function to enable existing extensions.
+enable_extension() {
+  if [ -e /tmp/setup_php_dismod ] && grep -q "$1" /tmp/setup_php_dismod; then
+    sudo phpenmod -v "$version" "$1" >/dev/null 2>&1
+  fi
+  if ! check_extension "$1" && [ -e "${ext_dir:?}/$1.so" ]; then
+    echo "$2=${ext_dir:?}/$1.so" >>"${pecl_file:-$ini_file}"
+  fi
+}
+
+# Function to configure PECL.
+configure_pecl() {
+  if ! [ -e /tmp/pecl_config ] && command -v pecl >/dev/null; then
+    for script in pear pecl; do
+      sudo "$script" config-set php_ini "${pecl_file:-$ini_file}"
+      sudo "$script" channel-update "$script".php.net
+    done
+    echo '' | sudo tee /tmp/pecl_config >/dev/null 2>&1
+  fi
+}
+
+# Function to get the PECL version of an extension.
+get_pecl_version() {
+  extension=$1
+  stability="$(echo "$2" | grep -m 1 -Eio "(alpha|beta|rc|snapshot|preview)")"
+  pecl_rest='https://pecl.php.net/rest/r/'
+  response=$(get -s -n "" "$pecl_rest$extension"/allreleases.xml)
+  pecl_version=$(echo "$response" | grep -m 1 -Pio "(\d*\.\d*\.\d*$stability\d*)")
+  if [ ! "$pecl_version" ]; then
+    pecl_version=$(echo "$response" | grep -m 1 -Po "(\d*\.\d*\.\d*)")
+  fi
+  echo "$pecl_version"
+}
+
+# Function to install PECL extensions and accept default options
+pecl_install() {
+  local extension=$1
+  yes '' 2>/dev/null | sudo pecl install -f "$extension" >/dev/null 2>&1
+}
+
+# Function to setup pre-release extensions using PECL.
+add_unstable_extension() {
+  extension=$1
+  stability=$2
+  prefix=$3
+  pecl_version=$(get_pecl_version "$extension" "$stability")
+  add_pecl_extension "$extension" "$pecl_version" "$prefix"
+}
+
+# Function to extract tool version.
+get_tool_version() {
+  tool=$1
+  param=$2
+  version_regex="[0-9]+((\.{1}[0-9]+)+)(\.{0})(-[a-zA-Z0-9]+){0,1}"
+  if [ "$tool" = "composer" ]; then
+    if [ "$param" != "snapshot" ]; then
+      composer_version="$(grep -Ea "const\sVERSION" "$tool_path_dir/composer" | grep -Eo "$version_regex")"
+    else
+      composer_version="$(grep -Ea "const\sBRANCH_ALIAS_VERSION" "$tool_path_dir/composer" | grep -Eo "$version_regex")+$(grep -Ea "const\sVERSION" "$tool_path_dir/composer" | grep -Eo "[a-zA-z0-9]+" | tail -n 1)"
+    fi
+    echo "$composer_version" | sudo tee /tmp/composer_version
+  else
+    $tool "$param" 2>/dev/null | sed -Ee "s/[Cc]omposer(.)?$version_regex//g" | grep -Eo "$version_regex" | head -n 1
+  fi
+}
+
+# Function to configure composer
+configure_composer() {
+  tool_path=$1
+  sudo ln -sf "$tool_path" "$tool_path.phar"
+  php -r "try {\$p=new Phar('$tool_path.phar', 0);exit(0);} catch(Exception \$e) {exit(1);}"
+  if [ $? -eq 1 ]; then
+    add_log "$cross" "composer" "Could not download composer"
+    exit 1
+  fi
+  composer -q global config process-timeout 0
+  echo "$composer_bin" >> "$GITHUB_PATH"
+  if [ -n "$COMPOSER_TOKEN" ]; then
+    composer -q global config github-oauth.github.com "$COMPOSER_TOKEN"
+  fi
+}
+
+# Function to setup a remote tool.
+add_tool() {
+  url=$1
+  tool=$2
+  ver_param=$3
+  tool_path="$tool_path_dir/$tool"
+  if [ ! -e "$tool_path" ]; then
+    rm -rf "$tool_path"
+  fi
+  IFS="," read -r -a url <<< "$url"
+  status_code=$(get -v -e "$tool_path" "${url[@]}")
+  if [ "$status_code" != "200" ] && [[ "${url[0]}" =~ .*github.com.*releases.*latest.* ]]; then
+    url[0]="${url[0]//releases\/latest\/download/releases/download/$(get -s -n "" "$(echo "${url[0]}" | cut -d '/' -f '1-5')/releases" | grep -Eo -m 1 "([0-9]+\.[0-9]+\.[0-9]+)/$(echo "${url[0]}" | sed -e "s/.*\///")" | cut -d '/' -f 1)}"
+    status_code=$(get -v -e "$tool_path" "${url[0]}")
+  fi
+  if [ "$status_code" = "200" ]; then
+    if [ "$tool" = "composer" ]; then
+      configure_composer "$tool_path"
+    elif [ "$tool" = "cs2pr" ]; then
+      sudo sed -i 's/\r$//; s/exit(9)/exit(0)/' "$tool_path" 2>/dev/null ||
+      sudo sed -i '' 's/\r$//; s/exit(9)/exit(0)/' "$tool_path"
+    elif [ "$tool" = "phan" ]; then
+      add_extension fileinfo extension >/dev/null 2>&1
+      add_extension ast extension >/dev/null 2>&1
+    elif [ "$tool" = "phive" ]; then
+      add_extension curl extension >/dev/null 2>&1
+      add_extension mbstring extension >/dev/null 2>&1
+      add_extension xml extension >/dev/null 2>&1
+    elif [ "$tool" = "wp-cli" ]; then
+      sudo cp -p "$tool_path" "$tool_path_dir"/wp
+    fi
+    tool_version=$(get_tool_version "$tool" "$ver_param")
+    add_log "$tick" "$tool" "Added $tool $tool_version"
+  else
+    add_log "$cross" "$tool" "Could not setup $tool"
+  fi
+}
+
+# Function to setup a tool using composer.
+add_composertool() {
+  tool=$1
+  release=$2
+  prefix=$3
+  if [[ "$tool" =~ prestissimo|composer-prefetcher ]]; then
+    composer_version=$(cat /tmp/composer_version)
+    if [ "$(echo "$composer_version" | cut -d'.' -f 1)" != "1" ]; then
+      echo "::warning:: Skipping $tool, as it does not support Composer $composer_version. Specify composer:v1 in tools to use $tool"
+      add_log "$cross" "$tool" "Skipped"
+      return
+    fi
+  fi
+  (
+    composer global require "$prefix$release" >/dev/null 2>&1 &&
+    json=$(grep "$prefix$tool" "$composer_json") &&
+    tool_version=$(get_tool_version 'echo' "$json") &&
+    add_log "$tick" "$tool" "Added $tool $tool_version"
+  ) || add_log "$cross" "$tool" "Could not setup $tool"
+  if [ -e "$composer_bin/composer" ]; then
+    sudo cp -p "$tool_path_dir/composer" "$composer_bin"
+  fi
+}
+
+# Function to get PHP version in semver format.
+php_semver() {
+  php"$version" -v | grep -Eo -m 1 "[0-9]+\.[0-9]+\.[0-9]+" | head -n 1
+}
\ No newline at end of file
diff --git a/src/scripts/darwin.sh b/src/scripts/darwin.sh
index 36c42773..80d67130 100644
--- a/src/scripts/darwin.sh
+++ b/src/scripts/darwin.sh
@@ -192,6 +192,10 @@ add_tool() {
     status_code=$(sudo curl -w "%{http_code}" -o "$tool_path" "${curl_opts[@]}" "${urls[1]}")
   else
     status_code=$(sudo curl -w "%{http_code}" -o "$tool_path" "${curl_opts[@]}" "$url")
+    if [ "$status_code" != "200" ] && [[ "$url" =~ .*github.com.*releases.*latest.* ]]; then
+      url=$(echo $url | sed -e "s|releases/latest/download|releases/download/$(curl "${curl_opts[@]}" "$(echo "$url" | cut -d '/' -f '1-5')/releases" | grep -Eo -m 1 "([0-9]+\.[0-9]+\.[0-9]+)/$(echo "$url" | sed -e "s/.*\///")" | cut -d '/' -f 1)|")
+      status_code=$(sudo curl -w "%{http_code}" -o "$tool_path" "${curl_opts[@]}" "$url")
+    fi
   fi
   if [ "$status_code" = "200" ]; then
     sudo chmod a+x "$tool_path"
diff --git a/src/scripts/linux.sh b/src/scripts/linux.sh
index 75e83bab..071dce37 100644
--- a/src/scripts/linux.sh
+++ b/src/scripts/linux.sh
@@ -295,6 +295,10 @@ add_tool() {
     status_code=$(sudo curl -w "%{http_code}" -o "$tool_path" "${curl_opts[@]}" "${urls[1]}")
   else
     status_code=$(sudo curl -w "%{http_code}" -o "$tool_path" "${curl_opts[@]}" "$url")
+    if [ "$status_code" != "200" ] && [[ "$url" =~ .*github.com.*releases.*latest.* ]]; then
+      url=$(echo $url | sed -e "s|releases/latest/download|releases/download/$(curl "${curl_opts[@]}" "$(echo "$url" | cut -d '/' -f '1-5')/releases" | grep -Eo -m 1 "([0-9]+\.[0-9]+\.[0-9]+)/$(echo "$url" | sed -e "s/.*\///")" | cut -d '/' -f 1)|")
+      status_code=$(sudo curl -w "%{http_code}" -o "$tool_path" "${curl_opts[@]}" "$url")
+    fi
   fi
   if [ "$status_code" = "200" ]; then
     sudo chmod a+x "$tool_path"
diff --git a/src/scripts/win32.ps1 b/src/scripts/win32.ps1
index 2ccf30dc..b730e5cc 100644
--- a/src/scripts/win32.ps1
+++ b/src/scripts/win32.ps1
@@ -255,28 +255,35 @@ Function Add-Tool() {
   } else {
     try {
       Invoke-WebRequest -UseBasicParsing -Uri $url -OutFile $bin_dir\$tool
-      $bat_content = @()
-      $bat_content += "@ECHO off"
-      $bat_content += "setlocal DISABLEDELAYEDEXPANSION"
-      $bat_content += "SET BIN_TARGET=%~dp0/" + $tool
-      $bat_content += "php %BIN_TARGET% %*"
-      Set-Content -Path $bin_dir\$tool.bat -Value $bat_content
-      Add-ToProfile $current_profile $tool "New-Alias $tool $bin_dir\$tool.bat" >$null 2>&1
-    } catch { }
-  }
-  if($tool -eq "phan") {
-    Add-Extension fileinfo >$null 2>&1
-    Add-Extension ast >$null 2>&1
-  } elseif($tool -eq "phive") {
-    Add-Extension xml >$null 2>&1
-  } elseif($tool -eq "cs2pr") {
-    (Get-Content $bin_dir/cs2pr).replace('exit(9)', 'exit(0)') | Set-Content $bin_dir/cs2pr
-  } elseif($tool -eq "composer") {
-    Edit-ComposerConfig $bin_dir\$tool
-  } elseif($tool -eq "wp-cli") {
-    Copy-Item $bin_dir\wp-cli.bat -Destination $bin_dir\wp.bat
+    } catch {
+      if($url -match '.*github.com.*releases.*latest.*') {
+        try {
+          $url = $url.replace("releases/latest/download", "releases/download/" + ([regex]::match((Invoke-WebRequest -UseBasicParsing -Uri ($url.split('/release')[0] + "/releases")).Content, "([0-9]+\.[0-9]+\.[0-9]+)/" + ($url.Substring($url.LastIndexOf("/") + 1))).Groups[0].Value).split('/')[0])
+          Invoke-WebRequest -UseBasicParsing -Uri $url -OutFile $bin_dir\$tool
+        } catch { }
+      }
+    }
   }
   if (((Get-ChildItem -Path $bin_dir/* | Where-Object Name -Match "^$tool(.exe|.phar)*$").Count -gt 0)) {
+    $bat_content = @()
+    $bat_content += "@ECHO off"
+    $bat_content += "setlocal DISABLEDELAYEDEXPANSION"
+    $bat_content += "SET BIN_TARGET=%~dp0/" + $tool
+    $bat_content += "php %BIN_TARGET% %*"
+    Set-Content -Path $bin_dir\$tool.bat -Value $bat_content
+    Add-ToProfile $current_profile $tool "New-Alias $tool $bin_dir\$tool.bat" >$null 2>&1
+    if($tool -eq "phan") {
+      Add-Extension fileinfo >$null 2>&1
+      Add-Extension ast >$null 2>&1
+    } elseif($tool -eq "phive") {
+      Add-Extension xml >$null 2>&1
+    } elseif($tool -eq "cs2pr") {
+      (Get-Content $bin_dir/cs2pr).replace('exit(9)', 'exit(0)') | Set-Content $bin_dir/cs2pr
+    } elseif($tool -eq "composer") {
+      Edit-ComposerConfig $bin_dir\$tool
+    } elseif($tool -eq "wp-cli") {
+      Copy-Item $bin_dir\wp-cli.bat -Destination $bin_dir\wp.bat
+    }
     $tool_version = Get-ToolVersion $tool $ver_param
     Add-Log $tick $tool "Added $tool $tool_version"
   } else {