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diff --git a/ext/ereg/tests/eregi_replace_basic.phpt b/ext/ereg/tests/eregi_replace_basic.phpt
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+--TEST--
+Test eregi_replace() function : basic functionality - confirm case insensitivity
+--FILE--
+
+<?php
+/* Prototype : proto string eregi_replace(string pattern, string replacement, string string)
+ * Description: Case insensitive replace regular expression
+ * Source code: ext/standard/reg.c
+ * Alias to functions:
+ */
+
+/*
+ * Test basic functionality of eregi_replace()
+ */
+
+echo "*** Testing eregi_replace() : basic functionality ***\n";
+
+$string = 'UPPERCASE WORDS, lowercase words, MIxED CaSe woRdS';
+
+echo "String Before...\n";
+var_dump($string);
+echo "\nString after...\n";
+
+var_dump(eregi_replace('([[:lower:]]+) word', '\\1_character', $string));
+
+echo "Done";
+?>
+
+--EXPECTF--
+*** Testing eregi_replace() : basic functionality ***
+String Before...
+string(50) "UPPERCASE WORDS, lowercase words, MIxED CaSe woRdS"
+
+String after...
+string(65) "UPPERCASE_characterS, lowercase_characters, MIxED CaSe_characterS"
+Done \ No newline at end of file