无法使用PHP变量列名称来更新SQL中的列 [英] Unable to use a PHP variable column name to update a column in SQL

问题描述

mysql_query("UPDATE students SET '. $rollno .' = '1'
             WHERE Faculty_id = $id AND date = $date");

$ROLLONO是不会更新的列的名称.

$ROLLONO is the name of the column which doesn't get updated.

推荐答案

我认为您正在动态使用列名，并且您想要:

I think you are dynamically using column name and you want :

mysql_query("UPDATE students SET ". $rollno ." = '1' WHERE Faculty_id = $id AND date = $date");

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