add nginx-php image

nginx-php/rootfs/usr/local/bin/docker-php-ext-enable

@@ -0,0 +1,83 @@
+#!/bin/sh
+set -e
+
+cd "$(php -r 'echo ini_get("extension_dir");')"
+
+usage() {
+    echo "usage: $0 [options] module-name [module-name ...]"
+    echo "   ie: $0 gd mysqli"
+    echo "       $0 pdo pdo_mysql"
+    echo "       $0 --ini-name 0-apc.ini apcu apc"
+    echo
+    echo 'Possible values for module-name:'
+    echo $(find -maxdepth 1 -type f -name '*.so' -exec basename '{}' ';' | sort)
+}
+
+opts="$(getopt -o 'h?' --long 'help,ini-name:' -- "$@" || { usage >&2 && false; })"
+eval set -- "$opts"
+
+iniName=
+while true; do
+    flag="$1"
+    shift
+    case "$flag" in
+        --help|-h|'-?') usage && exit 0 ;;
+        --ini-name) iniName="$1" && shift ;;
+        --) break ;;
+        *)
+            {
+                echo "error: unknown flag: $flag"
+                usage
+            } >&2
+            exit 1
+            ;;
+    esac
+done
+
+modules=
+for module; do
+    if [ -z "$module" ]; then
+        continue
+    fi
+    if [ -f "$module.so" ] && ! [ -f "$module" ]; then
+        # allow ".so" to be optional
+        module="$module.so"
+    fi
+    if ! [ -f "$module" ]; then
+        echo >&2 "error: $(readlink -f "$module") does not exist"
+        echo >&2
+        usage >&2
+        exit 1
+    fi
+    modules="$modules $module"
+done
+
+if [ -z "$modules" ]; then
+    usage >&2
+    exit 1
+fi
+
+for module in $modules; do
+    if nm -g "$module" | grep -q ' zend_extension_entry$'; then
+        # https://wiki.php.net/internals/extensions#loading_zend_extensions
+        line="zend_extension=$(readlink -f "$module")"
+    else
+        line="extension=$module"
+    fi
+
+    ext="$(basename "$module")"
+    ext="${ext%.*}"
+    if php -r 'exit(extension_loaded("'"$ext"'") ? 0 : 1);'; then
+        # this isn't perfect, but it's better than nothing
+        # (for example, 'opcache.so' presents inside PHP as 'Zend OPcache', not 'opcache')
+        echo >&2
+        echo >&2 "warning: $ext ($module) is already loaded!"
+        echo >&2
+        continue
+    fi
+
+    ini="/php/conf.d/${iniName:-"docker-php-ext-$ext.ini"}"
+    if ! grep -q "$line" "$ini" 2>/dev/null; then
+        echo "$line" >> "$ini"
+    fi
+done