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Error message Notice: Undefined index: lang
王先生
王先生 2019-09-19 17:30:42
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if ($_POST['lang']==null) {

echo "Please enter valid text";

}

Tips: Notice: Undefined index : lang

王先生
王先生

reply all(1)
Peter-Zhu
Peter-Zhu2019-09-20 09:00:23 1 floor

The prompt is very clear, undefined index: lang, check your array

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