Fix undefined functions in commented-out teaser on individual member …

…pages

Imperia now wrote the teaser code onto every individual member page, causing
errors since this code includes functions `member_teaser_start()` and `member_teaser_end()`
that are only defined in overview pages

www/data/Physik.FSPHYS/imperialive/Physik.FSPHYS/fachschaft/mitglieder/index.html

@@ -7,7 +7,7 @@
 $ob_offset = 0;
 $started = false;
 
-function member_teaser_start(): void {
+function member_teaser_start_impl(): void {
 	global $started;
 	// since the person’s name & title are duplicated in the “alt” attribute
 	// of the img element, this function will be called several times and
@@ -34,7 +34,7 @@
 	}
 }
 
-function member_teaser_end(): void {
+function member_teaser_end_impl(): void {
 	global $started;
 	$started = false;
 }

www/data/Physik.FSPHYS/php_include/init.php

@@ -1,5 +1,19 @@
 <?php
-namespace de\uni_muenster\fsphys;
+namespace {
+	// Prevent errors from teasers being included in full pages
+	function member_teaser_start(): void {
+		if (function_exists('member_teaser_start_impl')) {
+			member_teaser_start_impl();
+		}
+	}
+	function member_teaser_end(): void {
+		if (function_exists('member_teaser_end_impl')) {
+			member_teaser_end_impl();
+		}
+	}
+}
+
+namespace de\uni_muenster\fsphys {
 const LOG_EMAIL = 'fsphys@uni-muenster.de';
 // all fatal PHP runtime errors (category “error”)
 const E_CAT_ERROR = E_ERROR | E_PARSE | E_CORE_ERROR | E_COMPILE_ERROR
@@ -124,3 +138,4 @@ function mail_and_log(\Throwable $exception): void {
 	}
 });
 
+}