trajche · October 27, 2015 05:27 · Nov 13, 2013 · Nov 13, 2013 · Nov 13, 2013 · Nov 13, 2013
diff --git a/WordPress Custom Global Variables.md b/WordPress Custom Global Variables.md
@@ -80,7 +80,7 @@ function wtnerd_global_vars() {
 }
 ```
 
-Then, to call the variable elsewhere (another file):
+Then, to call the variable elsewhere (another file), you need to manually initialize the function before you can use the variable:
 
 ``` php
 <?php

diff --git a/WordPress Custom Global Variables.md b/WordPress Custom Global Variables.md
@@ -52,4 +52,43 @@ if( $GLOBALS['wtnerd']['edition'] == uk ) {
 	// Do something
 
 }
-```
+```
+
+***
+
+If the function in which you are defining the global variables is not hooked into a filter or action, e.g. `add_action( 'parse_query', 'wtnerd_global_vars' );` as we are doing above, then you should do it as shown below.
+
+In functions.php or mu-plugin:
+
+``` php
+<?php
+
+/*
+ * CUSTOM GLOBAL VARIABLES
+ */
+function wtnerd_global_vars() {
+
+	global $wtnerd;
+	$wtnerd = array(
+
+		'edition'  => get_query_var('category_name'),
+		'channel'  => get_query_var('channel'),
+		'tag'      => get_query_var('tag'),
+
+	);
+
+}
+```
+
+Then, to call the variable elsewhere (another file):
+
+``` php
+<?php
+
+wtnerd_global_vars();
+if( $GLOBALS['wtnerd']['edition'] == uk ) {
+
+	// Do something
+
+}
+```
diff --git a/WordPress Custom Global Variables.md b/WordPress Custom Global Variables.md
@@ -21,7 +21,9 @@ function wtnerd_global_vars() {
 add_action( 'parse_query', 'wtnerd_global_vars' );
 ```
 
-The same can also be done like this:
+Why are we using an associative array variable `$wtnerd`? Because global variables need to be unique, and by keeping `$wtnerd` unique we can have simpler names for all the variables in its array.
+
+By the way, the same can also be done like this:
 
 ``` php
 <?php

diff --git a/WordPress Custom Global Variables.md b/WordPress Custom Global Variables.md
@@ -38,4 +38,16 @@ function wtnerd_global_vars() {
 
 }
 add_action( 'parse_query', 'wtnerd_global_vars' );
+```
+
+Then use `$GLOBALS[];` to call the variable elsewhere (another file):
+
+``` php
+<?php
+
+if( $GLOBALS['wtnerd']['edition'] == uk ) {
+
+	// Do something
+
+}
 ```
diff --git a/WordPress Custom Global Variables.md b/WordPress Custom Global Variables.md
@@ -12,7 +12,7 @@ function wtnerd_global_vars() {
 	$wtnerd = array(
 
 		'edition'  => get_query_var('category_name'),
-		'channel' => get_query_var('channel'),
+		'channel'  => get_query_var('channel'),
 		'tag'      => get_query_var('tag'),
 
 	);
@@ -34,7 +34,7 @@ function wtnerd_global_vars() {
 	global $wtnerd;
 	$wtnerd['edition'] = get_query_var('category_name');
 	$wtnerd['channel'] = get_query_var('channel');
-	$wtnerd['tag'] = get_query_var('tag');
+	$wtnerd['tag']     = get_query_var('tag');
 
 }
 add_action( 'parse_query', 'wtnerd_global_vars' );

diff --git a/WordPress Custom Global Variables.md b/WordPress Custom Global Variables.md
@@ -12,8 +12,8 @@ function wtnerd_global_vars() {
 	$wtnerd = array(
 
 		'edition'  => get_query_var('category_name'),
-		'category' => get_query_var('category_name'),
-		'tag'      => get_query_var('category_name'),
+		'channel' => get_query_var('channel'),
+		'tag'      => get_query_var('tag'),
 
 	);
 
@@ -24,19 +24,17 @@ add_action( 'parse_query', 'wtnerd_global_vars' );
 The same can also be done like this:
 
 ``` php
+<?php
+
 /*
  * CUSTOM GLOBAL VARIABLES
  */
 function wtnerd_global_vars() {
 
 	global $wtnerd;
-	$wtnerd = array(
-
-		'edition'  => get_query_var('category_name'),
-		'category' => get_query_var('category_name'),
-		'tag'      => get_query_var('category_name'),
-
-	);
+	$wtnerd['edition'] = get_query_var('category_name');
+	$wtnerd['channel'] = get_query_var('channel');
+	$wtnerd['tag'] = get_query_var('tag');
 
 }
 add_action( 'parse_query', 'wtnerd_global_vars' );

diff --git a/WordPress Custom Global Variables.md b/WordPress Custom Global Variables.md
@@ -1,6 +1,8 @@
-First create global variables:
+First create global variables (in functions.php or as a mu-plugin):
 
 ``` php
+<?php
+
 /*
  * CUSTOM GLOBAL VARIABLES
  */

diff --git a/WordPress Custom Global Variables.md b/WordPress Custom Global Variables.md
@@ -1,6 +1,6 @@
 First create global variables:
 
-```
+``` php
 /*
  * CUSTOM GLOBAL VARIABLES
  */
@@ -21,7 +21,7 @@ add_action( 'parse_query', 'wtnerd_global_vars' );
 
 The same can also be done like this:
 
-```
+``` php
 /*
  * CUSTOM GLOBAL VARIABLES
  */

diff --git a/WordPress Custom Global Variables.md b/WordPress Custom Global Variables.md
@@ -0,0 +1,41 @@
+First create global variables:
+
+```
+/*
+ * CUSTOM GLOBAL VARIABLES
+ */
+function wtnerd_global_vars() {
+
+	global $wtnerd;
+	$wtnerd = array(
+
+		'edition'  => get_query_var('category_name'),
+		'category' => get_query_var('category_name'),
+		'tag'      => get_query_var('category_name'),
+
+	);
+
+}
+add_action( 'parse_query', 'wtnerd_global_vars' );
+```
+
+The same can also be done like this:
+
+```
+/*
+ * CUSTOM GLOBAL VARIABLES
+ */
+function wtnerd_global_vars() {
+
+	global $wtnerd;
+	$wtnerd = array(
+
+		'edition'  => get_query_var('category_name'),
+		'category' => get_query_var('category_name'),
+		'tag'      => get_query_var('category_name'),
+
+	);
+
+}
+add_action( 'parse_query', 'wtnerd_global_vars' );
+```
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