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                ThinkChat2.0新版上線,更智能更精彩,支持會話、畫圖、視頻、閱讀、搜索等,送10W Token,即刻開啟你的AI之旅 廣告
                ``` <?php $marks = array( "Ankit" => array( "C" => 95, "DCO" => 85, ), "Ram" => array( "C" => 78, "DCO" => 98, ), "Anoop" => array( "C" => 88, "DCO" => 46, ), ); $mark =["C" => 88, "DCO" => 46]; if(array_key_exists('Anoop',$marks)){ //檢查數組中此鍵名是否存在; unset($marks['Anoop']['C']); } var_dump($marks); ?> unset($marks['Anoop']['C']); ```
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