diff --git a/WordPress/Sniffs/WP/AlternativeFunctionsSniff.php b/WordPress/Sniffs/WP/AlternativeFunctionsSniff.php
index 40fb0c61c..eb5f8a398 100644
--- a/WordPress/Sniffs/WP/AlternativeFunctionsSniff.php
+++ b/WordPress/Sniffs/WP/AlternativeFunctionsSniff.php
@@ -283,7 +283,7 @@ public function process_matched_token( $stackPtr, $group_name, $matched_content
 				}
 
 				$contains_wp_path_constant = preg_match(
-					'`\b(?:ABSPATH|WP_(?:CONTENT|PLUGIN)_DIR|WPMU_PLUGIN_DIR|TEMPLATEPATH|STYLESHEETPATH|(?:MU)?PLUGINDIR)\b`',
+					'`(?<!\?->|->|::)\b(?:ABSPATH|WP_(?:CONTENT|PLUGIN)_DIR|WPMU_PLUGIN_DIR|TEMPLATEPATH|STYLESHEETPATH|(?:MU)?PLUGINDIR)\b`',
 					$filename_param['clean']
 				);
 				if ( 1 === $contains_wp_path_constant ) {
@@ -292,7 +292,7 @@ public function process_matched_token( $stackPtr, $group_name, $matched_content
 				}
 
 				$contains_wp_path_function_call = preg_match(
-					'`(?:get_home_path|plugin_dir_path|get_(?:stylesheet|template)_directory|wp_upload_dir)\s*\(`i',
+					'`(?<!\?->|->|::)(?:get_home_path|plugin_dir_path|get_(?:stylesheet|template)_directory|wp_upload_dir)\s*\(`i',
 					$filename_param['clean']
 				);
 				if ( 1 === $contains_wp_path_function_call ) {
diff --git a/WordPress/Tests/WP/AlternativeFunctionsUnitTest.inc b/WordPress/Tests/WP/AlternativeFunctionsUnitTest.inc
index a88e5638a..c0f7be222 100644
--- a/WordPress/Tests/WP/AlternativeFunctionsUnitTest.inc
+++ b/WordPress/Tests/WP/AlternativeFunctionsUnitTest.inc
@@ -147,3 +147,38 @@ file_get_contents(
 	// Not using plugin_dir_path() for reasons.
 	$url
 ); // Warning.
+
+/*
+ * Safeguard correct handling of all types of namespaced function calls
+ */
+\curl_init();
+MyNamespace\curl_init();
+\MyNamespace\curl_init();
+namespace\curl_init(); // The sniff should start flagging this once it can resolve relative namespaces.
+
+/*
+ * Safeguard correct handling of namespaced parameters passed to file_get_contents().
+ *
+ * Note: the sniff should flag the examples using a fully qualified namespaced name and partially
+ * qualified name, but currently does not. This will be addressed via
+ * https://github.com/WordPress/WordPress-Coding-Standards/issues/2603.
+ */
+file_get_contents(\wp_upload_dir()['path'] . 'subdir/file.inc');
+file_get_contents(MyNamespace\wp_upload_dir()['path'] . 'subdir/file.inc');
+file_get_contents(\MyNamespace\wp_upload_dir()['path'] . 'subdir/file.inc');
+file_get_contents(namespace\wp_upload_dir()['path'] . 'subdir/file.inc');
+file_get_contents(\ABSPATH . 'wp-admin/css/some-file.css');
+file_get_contents(MyNamespace\ABSPATH . 'wp-admin/css/some-file.css');
+file_get_contents(\MyNamespace\ABSPATH . 'wp-admin/css/some-file.css');
+file_get_contents(namespace\ABSPATH . 'wp-admin/css/some-file.css');
+
+/*
+ * Safeguard that the sniff does not incorrectly ignore class methods/constants with the same
+ * name as WordPress global functions/constants when used in file_get_contents().
+ */
+file_get_contents(MyClass::wp_upload_dir() . 'subdir/file.inc');
+file_get_contents($this->GET_HOME_PATH() . 'subdir/file.inc');
+file_get_contents($this?->plugin_dir_path() . 'subdir/file.inc');
+file_get_contents(MyClass::ABSPATH . 'subdir/file.inc');
+file_get_contents($this->WPMU_PLUGIN_DIR . 'subdir/file.inc');
+file_get_contents($this?->TEMPLATEPATH . 'subdir/file.inc');
diff --git a/WordPress/Tests/WP/AlternativeFunctionsUnitTest.php b/WordPress/Tests/WP/AlternativeFunctionsUnitTest.php
index b0f1bf96a..fd462ce32 100644
--- a/WordPress/Tests/WP/AlternativeFunctionsUnitTest.php
+++ b/WordPress/Tests/WP/AlternativeFunctionsUnitTest.php
@@ -89,6 +89,13 @@ public function getWarningList() {
 			131 => 1,
 			142 => 1,
 			146 => 1,
+			154 => 1,
+			179 => 1,
+			180 => 1,
+			181 => 1,
+			182 => 1,
+			183 => 1,
+			184 => 1,
 		);
 	}
 }