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-rw-r--r--ext/standard/tests/strings/bug77853.phpt20
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diff --git a/ext/standard/tests/strings/bug77853.phpt b/ext/standard/tests/strings/bug77853.phpt
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+++ b/ext/standard/tests/strings/bug77853.phpt
@@ -0,0 +1,20 @@
+--TEST--
+Bug #77853: Inconsistent substr_compare behaviour with empty haystack
+--FILE--
+<?php
+
+var_dump(substr_compare('', '', 0, 0));
+var_dump(substr_compare('', '', 0));
+
+var_dump(substr_compare('abc', '', 3, 0));
+var_dump(substr_compare('abc', '', 3));
+
+var_dump(substr_compare('abc', "\0", 3));
+
+?>
+--EXPECT--
+int(0)
+int(0)
+int(0)
+int(0)
+int(-1)