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Fix warning
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@@ -3828,6 +3828,10 @@ function isValidPhone($phone)
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*/
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function dol_strlen($string, $stringencoding = 'UTF-8')
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{
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if (is_null($string)) {
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return 0;
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}
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if (function_exists('mb_strlen')) {
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return mb_strlen($string, $stringencoding);
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} else {
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