How PHP and JavaScript handle multiple choices

We often have to make multiple choices for the user to process, such as allowing the user to select multiple items for a list item and then delete the selected item. Today's example shows how PHP and JavaScript handle multiple choices. What we're doing today is a voting system that polls the MySQL database itemtable table, and can only vote for two votes per individual IP.

Table ItemTable is established by the following MySQL statements:

CREATE TABLE ' itemtable ' (
' ID ' TINYINT (4) Not NULL auto_increment,
' Name ' VARCHAR (not NULL),
' Votes ' SMALLINT (6) Not NULL,
PRIMARY KEY (' id ')
);

Where the field "name" is the list item name, "votes" is the number of votes obtained. We also create a table "voteiptable" to record the IP of the voting user:

CREATE TABLE ' voteiptable ' (
' ID ' SMALLINT (6) Not NULL,
' Voteip ' VARCHAR (not NULL),
PRIMARY KEY (' id ')
);

Below we write the file "multivote.php", today we will use a database class file "dbclass.php".

We can see that both the client's JavaScript and the server-side PHP have many similarities in the processing of multiple choices, and of course there are differences. This is a more classic multi-option processing program, if you do not limit the user's options, it is simpler.

