At least on my system,
<? print(date('r')); ?>
crashes the web server process.
This is because it's trying to put a 32-byte string into a 16-byte buffer.
 static void
 php_date(INTERNAL_FUNCTION_PARAMETERS, int gm)
 {
         pval **format, **timestamp;
         time_t the_time;
         struct tm *ta, tmbuf;
         int i, size = 0, length, h, beat;
-        char tmp_buff[16];
+        char tmp_buff[32];
 
         switch(ZEND_NUM_ARGS()) {
         case 1: