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-rw-r--r--ext/standard/head.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/ext/standard/head.c b/ext/standard/head.c
index 87994bc369..6223ea8d93 100644
--- a/ext/standard/head.c
+++ b/ext/standard/head.c
@@ -183,7 +183,11 @@ PHP_FUNCTION(headers_sent)
ZVAL_LONG(arg2, line);
case 1:
zval_dtor(arg1);
- ZVAL_STRING(arg1, file, 1);
+ if (file) {
+ ZVAL_STRING(arg1, file, 1);
+ } else {
+ ZVAL_STRING(arg1, "", 1);
+ }
break;
}