How to use PHP to develop user voting and evaluation management modules in CMS

As websites and applications become more popular, the interaction between users becomes more and more meaningful. A common way is to implement user voting and evaluation management modules. This article will introduce how to use PHP to develop user voting and evaluation management modules in CMS.

1. Create database table

First, we need to create a database table to store data related to user votes and evaluations. The following are some necessary fields:

• id: the unique identifier of each user's vote or review
• item_id: the unique identifier of the item being voted or reviewed
• user_id: the user’s unique identifier
• type: vote or evaluation type
• value: the value of the vote or evaluation

In actual development, we can Additional fields need to be added.

2. Develop voting management function

Next, we need to implement the voting management function for users. This function mainly consists of the following steps:

• Get the ID of the current user.
• Get the ID of the item voted by the user.
• Determine whether the user has voted by querying the voting table in the database.
• If the user has not voted yet, add this vote to the table.

The following is a sample code for adding a vote:

$userid = get_current_user_id(); //Get the current user ID
$itemid = get_the_ID(); / /Get the ID of the voted item
if ( !user_voted( $userid, $itemid ) ) { //Check whether the user has voted

add_vote( $itemid, $userid, $type, $value ); //将用户投票添加到表格

}

3. Development evaluation The management function

is similar to the voting management function. The above steps also need to be followed to develop the evaluation management function, but there are some differences:

• Get the ID of the current user.
• Get the ID of the item rated by the user.
• Determine whether the user has made an evaluation by querying the evaluation table in the database.
• If the user has not rated it yet, add this rating to the table.

The following is a sample code for adding reviews:

$userid = get_current_user_id(); //Get the current user ID
$itemid = get_the_ID(); / /Get the ID of the rated item
if ( !user_rated( $userid, $itemid ) ) { //Check whether the user has already rated it

add_rating( $itemid, $userid, $type, $value ); //将用户评价添加到表格

}

4. Display voting and evaluation information

Finally, we need to display voting and evaluation information in the CMS. Here are some ways:

• Get the vote total and average for a specific item and display it on the page.
• Display the options that the user has voted or evaluated, and provide the user with the option to revoke the vote or evaluation.

Here is a sample code that contains all the information:

$itemid = get_the_ID();
$total_votes = get_total_votes( $itemid );
$average_rating = get_average_rating( $itemid );
if ( user_voted( $userid, $itemid ) ) { // Check if the user has already voted

echo 'You’ve already voted. Want to change your vote?';

} else {

echo 'Would you like to vote?';

}
if ( user_rated( $userid, $itemid ) ) { // Check if the user has rated

echo 'You’ve already rated this item. Want to change your rating?';

} else {

echo 'Would you like to rate this item?';

}
echo "Total votes: $total_votes | Average rating: $average_rating";

Summary

In this article, we introduced how to use PHP to develop user voting and rating management modules in CMS. These two modules can help websites and applications better interact with users. If you have related needs, you can try the methods provided in this article.

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