Add Github Actions config for CI and PHP syntax checking

This adds continuous-integration configuration
for checking PHP syntax.

Refs: #817

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, macos-latest, windows-latest ]
+        php: [ '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1' ]
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v1
+
+    - name: Set up PHP
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{matrix.php}}
+        extensions: fileinfo, json, pdo, mbstring
+
+    - name: Install
+      run: |
+        composer install
+
+    - name: Test
+      run: |
+        composer test

.gitignore

@@ -19,4 +19,8 @@
 
 # Eclipse
 .settings
-.project
+.project
+
+# Composer
+vendor/
+

composer.json

@@ -0,0 +1,19 @@
+{
+  "name": "piwigo/piwigo",
+  "description": "A full featured open source photo gallery for the web.",
+  "license": "GPL-2.0-only",
+  "require-dev": {
+    "php-parallel-lint/php-parallel-lint": "^1.0"
+  },
+  "config": {
+    "platform": {
+      "php": "5.6"
+    }
+  },
+  "scripts": {
+    "test": [
+      "composer validate",
+      "parallel-lint . --exclude vendor/ --exclude include/random_compat/"
+    ]
+  }
+}

include/ws_protocols/xmlrpc_encoder.php

@@ -6,6 +6,8 @@
 // | file that was distributed with this source code.                      |
 // +-----------------------------------------------------------------------+
 
+if (!function_exists('xmlrpc_encode'))
+{
 function xmlrpc_encode($data)
 {
   switch (gettype($data))
@@ -44,6 +46,7 @@ function xmlrpc_encode($data)
       return $return;
   }
 }
+}
 
 class PwgXmlRpcEncoder extends PwgResponseEncoder
 {

tools/test_piwigo.php

@@ -261,7 +261,8 @@ function add_picture($option, $cookies, $pwg_token)
   ;';
 
   $res = $mysqli->query($query);
-  if (($row = $res->fetch_row())[0] > 0) {
+  $row = $res->fetch_row();
+  if ($row[0] > 0) {
     echo "Add a Picture OK!\n";
   }
   else {