Documenting error handling p. 10-11.

.idea/workspace.xml

@@ -2,6 +2,7 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="ddb2382b-0607-474c-bb0c-2ed75e2c2479" name="Default" comment="">
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" afterPath="$PROJECT_DIR$/.idea/workspace.xml" />
       <change beforePath="$PROJECT_DIR$/src/controllers.php" afterPath="$PROJECT_DIR$/src/controllers.php" />
     </list>
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
@@ -15,12 +16,12 @@
     <pharConfigPath>$PROJECT_DIR$/composer.json</pharConfigPath>
   </component>
   <component name="FileEditorManager">
-    <leaf>
+    <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
       <file leaf-file-name="controllers.php" pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/src/controllers.php">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="259">
-              <caret line="81" column="46" lean-forward="false" selection-start-line="81" selection-start-column="46" selection-end-line="81" selection-end-column="46" />
+            <state relative-caret-position="192">
+              <caret line="61" column="61" lean-forward="false" selection-start-line="61" selection-start-column="61" selection-end-line="61" selection-end-column="61" />
               <folding />
             </state>
           </provider>
@@ -197,7 +198,6 @@
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
-      <pane id="Scratches" />
       <pane id="ProjectPane">
         <subPane>
           <expand>
@@ -233,178 +233,6 @@
               <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
               <item name="templates" type="2a2b976b:PhpTreeStructureProvider$1" />
             </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="composer" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="pimple" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="pimple" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="pimple" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="pimple" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="pimple" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="src" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="pimple" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="pimple" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="src" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="Pimple" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="silex" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="silex" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="silex" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="silex" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="silex" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="src" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="silex" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="silex" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="src" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="Silex" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="silex" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="silex" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="src" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="Silex" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="EventListener" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="silex" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="silex" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="src" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="Silex" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="Provider" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="symfony" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="symfony" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="event-dispatcher" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="symfony" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="http-foundation" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="symfony" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="http-kernel" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="symfony" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="http-kernel" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="Controller" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="symfony" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="http-kernel" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="Event" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="symfony" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="http-kernel" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="Exception" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="twig" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="twig" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="twig" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="twig" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="twig" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="lib" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
-            <path>
-              <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
-              <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="vendor" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="twig" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="twig" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="lib" type="2a2b976b:PhpTreeStructureProvider$1" />
-              <item name="Twig" type="2a2b976b:PhpTreeStructureProvider$1" />
-            </path>
             <path>
               <item name="silex-book" type="b2602c69:ProjectViewProjectNode" />
               <item name="silex-book" type="2a2b976b:PhpTreeStructureProvider$1" />
@@ -414,6 +242,7 @@
           <select />
         </subPane>
       </pane>
+      <pane id="Scratches" />
       <pane id="Scope" />
     </panes>
   </component>
@@ -452,29 +281,29 @@
       <workItem from="1511938964059" duration="4476000" />
       <workItem from="1511945660695" duration="9000" />
       <workItem from="1511945681954" duration="1284000" />
-      <workItem from="1511975755546" duration="3855000" />
+      <workItem from="1511975755546" duration="4189000" />
+      <workItem from="1512542104610" duration="649000" />
     </task>
     <servers />
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="9624000" />
+    <option name="totallyTimeSpent" value="10607000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="23" width="1676" height="1027" extended-state="6" />
     <editor active="true" />
     <layout>
+      <window_info id="Project" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.26499388" sideWeight="0.5" order="5" side_tool="false" content_ui="combo" />
       <window_info id="TODO" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="10" side_tool="false" content_ui="tabs" />
+      <window_info id="Docker" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="11" side_tool="false" content_ui="tabs" />
       <window_info id="Event Log" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32939914" sideWeight="0.5" order="0" side_tool="true" content_ui="tabs" />
+      <window_info id="Database" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
       <window_info id="Run" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="6" side_tool="false" content_ui="tabs" />
       <window_info id="Version Control" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32939914" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
+      <window_info id="Structure" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.24908201" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
       <window_info id="Mongo Explorer" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
       <window_info id="Terminal" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
-      <window_info id="Project" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.2619339" sideWeight="0.5" order="5" side_tool="false" content_ui="combo" />
-      <window_info id="Docker" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="11" side_tool="false" content_ui="tabs" />
-      <window_info id="Database" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
-      <window_info id="Find" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="5" side_tool="false" content_ui="tabs" />
-      <window_info id="Structure" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.24908201" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
-      <window_info id="Debug" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.39914164" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
+      <window_info id="Debug" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.39914164" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
       <window_info id="Favorites" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="0" side_tool="true" content_ui="tabs" />
       <window_info id="Cvs" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="8" side_tool="false" content_ui="tabs" />
       <window_info id="Message" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="4" side_tool="false" content_ui="tabs" />
@@ -482,6 +311,7 @@
       <window_info id="Inspection" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.4" sideWeight="0.5" order="9" side_tool="false" content_ui="tabs" />
       <window_info id="Hierarchy" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="4" side_tool="false" content_ui="combo" />
       <window_info id="Metrics" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
+      <window_info id="Find" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="5" side_tool="false" content_ui="tabs" />
       <window_info id="Ant Build" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
     </layout>
   </component>
@@ -496,12 +326,12 @@
       <breakpoints>
         <line-breakpoint enabled="true" type="php">
           <url>file://$PROJECT_DIR$/src/controllers.php</url>
-          <line>86</line>
+          <line>93</line>
           <option name="timeStamp" value="28" />
         </line-breakpoint>
         <line-breakpoint enabled="true" type="php">
           <url>file://$PROJECT_DIR$/src/controllers.php</url>
-          <line>83</line>
+          <line>84</line>
           <option name="timeStamp" value="36" />
         </line-breakpoint>
       </breakpoints>
@@ -510,6 +340,14 @@
     <watches-manager />
   </component>
   <component name="editorHistoryManager">
+    <entry file="file://$PROJECT_DIR$/src/controllers.php">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="0">
+          <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/src/controllers.php">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
@@ -537,7 +375,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="5985">
           <caret line="399" column="0" lean-forward="false" selection-start-line="399" selection-start-column="0" selection-end-line="399" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -568,7 +405,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="5985">
           <caret line="399" column="0" lean-forward="false" selection-start-line="399" selection-start-column="0" selection-end-line="399" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -637,7 +473,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="102">
           <caret line="768" column="27" lean-forward="true" selection-start-line="768" selection-start-column="27" selection-end-line="768" selection-end-column="27" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -684,7 +519,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="852">
           <caret line="399" column="0" lean-forward="false" selection-start-line="399" selection-start-column="0" selection-end-line="399" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -728,19 +562,11 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/demo/Controllers/ErrorController.php">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="105">
-          <caret line="7" column="0" lean-forward="true" selection-start-line="1" selection-start-column="0" selection-end-line="7" selection-end-column="0" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
+    <entry file="file://$PROJECT_DIR$/src/demo/Controllers/ErrorController.php" />
     <entry file="file://$PROJECT_DIR$/vendor/symfony/http-kernel/Controller/ControllerResolver.php">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="170">
           <caret line="194" column="0" lean-forward="false" selection-start-line="194" selection-start-column="0" selection-end-line="194" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -748,7 +574,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="327">
           <caret line="477" column="0" lean-forward="false" selection-start-line="477" selection-start-column="0" selection-end-line="477" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -764,7 +589,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="357">
           <caret line="382" column="0" lean-forward="false" selection-start-line="382" selection-start-column="0" selection-end-line="382" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -772,7 +596,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="222">
           <caret line="323" column="0" lean-forward="false" selection-start-line="323" selection-start-column="0" selection-end-line="323" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -780,7 +603,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="177">
           <caret line="18" column="6" lean-forward="false" selection-start-line="18" selection-start-column="6" selection-end-line="18" selection-end-column="6" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -788,7 +610,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="240">
           <caret line="16" column="48" lean-forward="true" selection-start-line="16" selection-start-column="48" selection-end-line="16" selection-end-column="48" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -796,7 +617,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="328">
           <caret line="44" column="0" lean-forward="false" selection-start-line="44" selection-start-column="0" selection-end-line="44" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -804,7 +624,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="432">
           <caret line="58" column="0" lean-forward="false" selection-start-line="58" selection-start-column="0" selection-end-line="58" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -812,7 +631,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="207">
           <caret line="196" column="0" lean-forward="false" selection-start-line="196" selection-start-column="0" selection-end-line="196" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -820,7 +638,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="195">
           <caret line="52" column="53" lean-forward="false" selection-start-line="52" selection-start-column="53" selection-end-line="52" selection-end-column="53" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -828,7 +645,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="207">
           <caret line="126" column="0" lean-forward="false" selection-start-line="126" selection-start-column="0" selection-end-line="126" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -844,7 +660,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="462">
           <caret line="118" column="0" lean-forward="false" selection-start-line="118" selection-start-column="0" selection-end-line="118" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -852,7 +667,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="292">
           <caret line="91" column="0" lean-forward="false" selection-start-line="91" selection-start-column="0" selection-end-line="91" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -860,7 +674,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="170">
           <caret line="47" column="18" lean-forward="false" selection-start-line="47" selection-start-column="18" selection-end-line="47" selection-end-column="18" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -868,14 +681,13 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="762">
           <caret line="91" column="0" lean-forward="false" selection-start-line="91" selection-start-column="0" selection-end-line="91" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/src/controllers.php">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="259">
-          <caret line="81" column="46" lean-forward="false" selection-start-line="81" selection-start-column="46" selection-end-line="81" selection-end-column="46" />
+        <state relative-caret-position="192">
+          <caret line="61" column="61" lean-forward="false" selection-start-line="61" selection-start-column="61" selection-end-line="61" selection-end-column="61" />
           <folding />
         </state>
       </provider>

src/controllers.php

@@ -59,6 +59,7 @@ $app->get('/blog/{id}', BlogController::class . '::fifiAction')
   ->when("request.headers.get('User-Agent') matches '/firefox/i'");
 $app->get('/blog/{id}', function (Application $app, $id) use ($blogPosts) {
   if (!isset ($blogPosts [$id])) {
+    // Will trigger the error() (or built-in) error handler.1
     $app->abort(Response::HTTP_NOT_FOUND, "Post $id does not exist.");
   }
   $post = $blogPosts [$id];
@@ -83,11 +84,19 @@ $app->error(function (HttpException $e, Request $request, $code) {
     ['X-Status-Code' => Response::HTTP_OK]);
   return $response;
 });
+/* Custom error handlers registered with error() take precedence over the
+  built-in error handler provider by Silex, but the formatted error messages it
+  provides can be accessed in debug mode by returning based on $app['debug']
+  like this.
+ */
 $app->error(function (\Exception $e, Request $request, $code) use ($app) {
+  // Use the default handler in debug mode.
   if ($app['debug']) {
     return;
   }
 
+  // Use our error formats otherwise.
+
   // 404.html, or 40x.html, or 4xx.html, or error.html
   $templates = [
     'errors/' . $code . '.html.twig',