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--TEST--
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mb_convert_encoding() shouldn't leak keys
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--SKIPIF--
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<?php require 'skipif.inc'; ?>
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--FILE--
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<?php
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$x = "x";
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$array = ["foo" . $x => "bar"];
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mb_convert_encoding($array, 'UTF-8', 'UTF-8');
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var_dump($array);
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?>
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--EXPECT--
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array(1) {
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["foox"]=>
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string(3) "bar"
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}
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