Enable JVM settings in PHP travis yml

lib/travis/yml/schema/def/lang/php.rb

@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+require 'travis/yml/schema/def/lang/jdks'
 
 module Travis
   module Yml
@@ -11,7 +12,10 @@ def define
             title 'PHP'
             summary 'PHP language support'
             see 'Building a PHP Project': 'https://docs.travis-ci.com/user/languages/php/'
+
             matrix :php
+            matrix :jdk, to: :jdks
+
             map :composer_args, to: :str
           end
         end

public/docs/ref/jobs/allow_failures/jobs_entries/jobs_entry/language/php.html

@@ -61,18 +61,25 @@ <h2 id="keys">Keys</h2>
 
 <ul>
 <li><p><code>php</code> &mdash; (type: sequence of string, or string, <a href="/matrix">matrix expand key</a>)</p></li>
+<li><p><code>jdk</code> &mdash; JDK versions (type: sequence of string, or string, <a href="/matrix">matrix expand key</a>)</p></li>
 <li><p><code>composer_args</code> &mdash; (type: string)</p></li>
 </ul>
 
 <h2 id="examples">Examples</h2>
 
 <pre><code class="yaml">php:
 - string
+jdk:
+- string
 composer_args: string
 </code></pre>
 
 <pre><code class="yaml">php: string
 
+</code></pre>
+
+<pre><code class="yaml">jdk: string
+
 </code></pre>
 
     </div>

schema.json

@@ -8454,6 +8454,14 @@
               ]
             }
           },
+          "jdk": {
+            "type": "string",
+            "only": {
+              "language": [
+                "php"
+              ]
+            }
+          },
           "composer_args": {
             "type": "string",
             "only": {
@@ -10644,4 +10652,4 @@
     "smalltalk_config",
     "smalltalk_vm"
   ]
-}
+}

spec/travis/yml/schema/def/lang/php_spec.rb

@@ -22,6 +22,17 @@
             ]
           }
         },
+        jdk: {
+          '$ref': '#/definitions/type/jdks',
+          flags: [
+            :expand
+          ],
+          only: {
+            language: [
+              'php'
+            ]
+          },
+        },
         composer_args: {
           type: :string,
           only: {