PHP implementation of random ads image display

Source: Internet
Author: User
Keywords PHP implementation of random ads image display
Tags strcmp
######## #随机广告显示 ##########
function MyAds () {
$dir = "ads"; #设置存放记录的目录
$dir = "ads"; #设置存放记录的目录
$ads = "$dir/ads.txt"; #设置广告代码文件
$log = "$dir/ads.log"; #设置ip记录文件
 
$ads _lines=file ($ads);
$lines =count ($ads _lines); #文件总行数
 
# # # #读出广告总数 $ads _count and display count to array $display_array########
$ads _count=0;
$display _count=0;
for ($i =0; $i < $lines; $i + +) {
if (!strcmp (substr ($ads _lines[$i],0,7), "display")) {
$ads _count+=1;
$display _array[$ads _count]=substr ($ads _lines[$i],8);
$display _count+= $display _array[$ads _count];
}
}
# # # #决定随机显示序号 $display _rand#####
Srand (Double) microtime () *1000000);
$display _rand = rand (1, $display _count);
 
# # #决定广告序号 $ads _num######
$pricount = 0;
$ads _num=1;
for ($i =1; $i <= $ads _count; $i + +) {
$pricount + = $display _array[$i];
if ($display _rand<= $pricount) {$ads _num= $i; break;}
}
 
# # # # #播放广告 ########
$num = 0;
$flag = 0;
 
for ($i =0; $i < $lines; $i + +) {
if (!strcmp (substr ($ads _lines[$i],0,7), "display")) {$num + +;}
if (($num = = $ads _num) and ($flag ==0)) {$flag =1;continue;}
if ($flag ==1) and strcmp ($ads _lines[$i][0], "#") {echo $ads _lines[$i];continue;}
if ($flag ==1) and (! ( strcmp ($ads _lines[$i][0], "#"))) {break;}
}
# # # #纪录广告显示次数 #########
$FP =fopen ($log, "a");
Fputs ($fp, Date ("Y-m-d h:i:s"). Getenv ("REMOTE_ADDR"). " ==> ". $ads _num.");
Fclose ($FP);
}
?>

Ad code file Ads.txt

 ########每个广告代码之间用'#'隔开,display为显示加权数,越大显示次数越多######
 display=10  
 
 
 ################################
 display=10  
 
 
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