diff --git a/README.md b/README.md
index 366afec..4d2ff4b 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,13 @@ Add a script tag to your page pointed at the livereload server
   ignore nothing. It is also possible to define an array and use multiple [anymatch](https://github.com/micromatch/anymatch) patterns.
 - `delay` - (Default: `0`) amount of milliseconds by which to delay the live reload (in case build takes longer)
 - `useSourceHash` - (Default: `false`) create hash for each file source and only notify livereload if hash has changed
+- `shouldReload` - (Default: `function`) callback which gets called with a `compilation` argument to decide if page should reload, by returning a boolean. Usually page gets reloaded when compilation hash changes, but sometimes it may be desirable to reload even if hash stays the same. I.e. `CopyWebpackPlugin` can emit changed files, but it doesn't change compilation hash. In this case you could check emitted files to decide if reloading is required:
+
+```
+shouldReload(compilation) {
+    return Array.from(compilation.emittedAssets).some(assetName => path.extname(assetName) === '.php');
+}
+```
 
 ## Why?
 
diff --git a/index.js b/index.js
index b820806..8ae8e83 100755
--- a/index.js
+++ b/index.js
@@ -27,6 +27,9 @@ class LiveReloadPlugin {
       useSourceHash: false,
       appendScriptTag: false,
       delay: 0,
+      shouldReload(compilation) {
+        return false;
+      },
     }, options);
 
     // Random alphanumeric string appended to id to allow multiple instances of live reload
@@ -152,7 +155,7 @@ class LiveReloadPlugin {
     if (
         this._isRunning()
         && include.length > 0
-        && (hash !== this.lastHash || !LiveReloadPlugin.arraysEqual(childHashes, this.lastChildHashes))
+        && (hash !== this.lastHash || !LiveReloadPlugin.arraysEqual(childHashes, this.lastChildHashes) || this.options.shouldReload(compilation))
     ) {
       this.lastHash = hash;
       this.lastChildHashes = childHashes;