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HomeBackend DevelopmentPHP TutorialA complete collection of small apartment decoration renderings in 2012. Using PHP to manage small site advertising

Image link ads are probably the most commonly used online advertising model, but the dynamic and random display of multiple ads is not that simple. PHP's file upload function provides a solution to randomly display advertisements based on weight in this 468x60 pixel area (the standard size of web page advertisements), thereby avoiding the need for plug-ins in the development of FTP programs or ASP and Perl CAI Extensions are needed to achieve this feature.
 This example was debugged under PHP4+MySQL+Apache for Win9x/2000. It consists of two parts: the program AddNewAd.php3 for adding new advertisements and the program ShowAd.php3 for displaying advertisements, both of which are stored in the server PHP file directory. In the "test/guanggao/" directory. Create a subdirectory "adbanner/" in the guanggao directory to store advertising link images.Below we analyze step by step.
1. First, create a MySQL database: guanggao
 In a Windows environment, it is very simple to create an empty MySQL database, because each database is a subdirectory that exists in the mysql/data/ directory, so just create a new one in this directory The subdirectory guanggao is sufficient. At this time, there are no tables and data in the database.
2. Create a new advertising program: AddNewAd.php3
Design idea: first use a form to get the user's new advertising information; then use the PHP function copy() to upload the link image (banner) file to the server adbanner directory; finally The image file name, advertising URL, description, weighting information, etc. are written into the created MySQL data table ad. The program code is as follows:
 # AddNewAd.php3——Add new advertisement#
Add new advertisement
//The form is used to enter the new advertisement information and is handed over to the following PHP program for processing;
//Among them, the weighted value priority The larger the number, the higher the probability of the loading page image appearing. The default is 1.
Advertising Banner:
Advertising URL:
Image link description ALT:
Display weighting:

// PHP program that processes form data;
// Image banner name and link address cannot be empty;
if (( banner!=" ") & ( url!="")) {
//If the advertising link and image name have been used, you must choose another one;
if (file_exists("adbanner/". banner_name)) {
echo "Advertising image. banner_name .Already used, please choose another one! ";
exit;
};
//Upload the link image file name to the adbanner directory;
copy(banner,"adbanner/". banner_name);
//Connect to the MySQL database;
connection = mysql_connect();
//Select the data source guanggao and execute the query;;
mysql_select_db("guanggao", );
query="SELECT * FROM ad";
result=mysql_query(query);
//If the data If table ad does not exist, create a new data table ad according to the following structure;
if(!result){
mysql_query("
create table ad(
url varchar(100) not null,
banner varchar(150) not null,
alt varchar(100) null,
priority tinyint(4) default '1' not null
)") or die(mysql_error());
}
//Insert new data from the form into the data table ad;
query="insert into ad(url, banner, alt, priority) values(' url', ' banner_name', '
alt', ' priority')";
//If the insertion is successful, the following information will be displayed;
try=mysql_query ( query);
if( try){
echo "An advertisement has been added, detailed information:
";
echo "
";
echo "Ad URL: url
Ad link description: alt
Display weighting: priority " ;
  }
    }
?>
3. Create a display advertising program: ShowAd.php3
Design idea: get all the column information in the database table and store it in the corresponding one-dimensional array, and add the weights of all ads To get a maximum random number, use srand() to generate a random tree seed each time the page is loaded, then use the rand() function to generate a random number between 1 and the maximum random number, and then randomly display different numbers according to certain rules. For advertising banners, the greater the weight, the greater the chance of being displayed.
       # ShowAd.php3——Display ads randomly #                                                                   using using using                 ‐ ‐                                 using   using         ‐              query="SELECT url, banner, alt, priority FROM ad where priority > 0";
result=mysql_db_query("guanggao", query);
numrows=mysql_num_rows(result);
//Use the mysql_fetch_object() function to obtain useful column information. to the corresponding array;
while( row = mysql_fetch_object( result)) {
adurl[]= row->url;
adbanner[]= row->banner;
adalt[]= row->alt;
adpriority[]= row->priority;
}
​ //Initialize intermediate variables;
numcheck= numrows;
i= pricount=0;
​ //Get the maximum random number;
​ while( numcheck) { while
pricount += adpriority[ i];
i++; numcheck--;
}
//Generate a random number seed every one millionth of a second when the program is executed;
srand((double)microtime()*1000000);
//Get 1 to the maximum A random number between random numbers;
pri = rand(1, pricount);
//The intermediate variables are cleared;
pricount=0;
//According to different weighted values, the elements used to display advertisements are words. Array of strings;
for( i=0; i pricount += adpriority[ i];
if ( pri ad[]="";
}
} 广 // Display the advertisement, the greater the value, the greater the opportunity;
echo ad [0];
? & Gt;
The above has introduced the use of PHP to implement small site advertising management, including the content of the small apartment decoration renderings 2012 pictures. I hope it will be helpful to friends who are interested in PHP tutorials.


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