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@@ -484,7 +484,7 @@ class SecurityExtension extends Extension
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if (isset($config[$key.'s'])) {
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$values = $config[$key.'s'];
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} elseif (isset($config[$key])) {
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- if (!is_int(key($config[$key]))) {
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+ if (is_string($config[$key]) || !is_int(key($config[$key]))) {
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// only one
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$values = array($config[$key]);
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} else {
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