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--TEST--
Bug #77428: mb_ereg_replace() doesn't replace a substitution variable
--FILE--
<?php
// This behavior is broken, but kept for BC reasons
var_dump(mb_ereg_replace('(%)', '\\\1', 'a%c'));
// For clarify, the above line is equivalent to:
var_dump(mb_ereg_replace('(%)', '\\\\1', 'a%c'));
?>
--EXPECT--
string(4) "a\%c"
string(4) "a\%c"
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