Add support for old PHP versions on linux

src/scripts/ext/extensions.sh

@@ -1,12 +1,76 @@
-php_h="https://raw.githubusercontent.com/php/php-src/PHP-$2/main/php.h"
+linux_extension_dir() {
+  apiv=$1
+  if [ "$version" = "5.3" ]; then
+    echo "/home/runner/php/5.3.29/lib/php/extensions/no-debug-non-zts-$apiv"
+  elif [[ "$version" =~ $old_versions_linux ]]; then
+    echo "/usr/lib/php5/$apiv"
+  elif [ "$version" = "8.0" ]; then
+    echo "/home/runner/php/8.0/lib/php/extensions/no-debug-non-zts-$apiv"
+  else
+    echo "/usr/lib/php/$apiv"
+  fi
+}
+
+darwin_extension_dir() {
+  apiv=$1
+  if [[ "$version" =~ $old_versions_darwin ]]; then
+    echo "/opt/local/lib/php${version/./}/extensions/no-debug-non-zts-$apiv"
+  else
+    echo "/usr/local/lib/php/pecl/$apiv"
+  fi
+}
+
+get_apiv() {
+  case $version in
+    5.3)
+      echo "20090626"
+      ;;
+    5.4)
+      echo "20100525"
+      ;;
+    5.5)
+      echo "20121212"
+      ;;
+    5.6)
+      echo "20131226"
+      ;;
+    7.0)
+      echo "20151012"
+      ;;
+    7.1)
+      echo "20160303"
+      ;;
+    7.2)
+      echo "20170718"
+      ;;
+    7.3)
+      echo "20180731"
+      ;;
+    *)
+      if [ "$version" = "8.0" ]; then
+        php_h="https://raw.githubusercontent.com/php/php-src/master/main/php.h"
+      else
+        semver=$(curl -sSL --retry 5 https://github.com/php/php-src/releases | grep "$flags" "(php-$version.[0-9]+)".zip | head -n 1 | grep "$flags" '[0-9]+\.[0-9]+\.[0-9]+')
+        php_h="https://raw.githubusercontent.com/php/php-src/PHP-$semver/main/php.h"
+      fi
+      curl -sSL --retry 5 "$php_h" | grep "PHP_API_VERSION" | cut -d' ' -f 3
+      ;;
+  esac
+}
+
+version=$2
+old_versions_linux="5.[4-5]"
+old_versions_darwin="5.[3-5]"
 os=$(uname -s)
 if [ "$os" = "Linux" ]; then
-  apiv=$(curl -sSL --retry 5 "$php_h" | grep "PHP_API_VERSION" | cut -d' ' -f 3)
-  dir="/usr/lib/php/$apiv"
-  sudo mkdir -p "$dir" && sudo chown -R "$USER":"$(id -g -n)" /usr/lib/php
+  flags='-Po'
+  apiv=$(get_apiv)
+  dir=$(linux_extension_dir "$apiv")
+  sudo mkdir -p "$dir" && sudo chown -R "$USER":"$(id -g -n)" $(dirname "$dir")
 elif [ "$os" = "Darwin" ]; then
-  apiv=$(curl -sSL --retry 5 "$php_h" | grep "PHP_API_VERSION" | cut -d' ' -f 3)
-  dir="/usr/local/lib/php/pecl/$apiv"
+  flags='-Eo'
+  apiv=$(get_apiv)
+  dir=$(darwin_extension_dir "$apiv")
 else
   dir='C:\\tools\\php\\ext'
 fi