PHP Example: The use of PHP program to achieve random ads picture display

<?php
######## #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"). " ==> ". $ads _num." \ n ");
Fclose ($FP);
}
?>

Advertising code file Ads.txt

####### #每个广告代码之间用 ' # ' is separated, display displays the weighted number, the larger the display number ######
display=10
<a href= "AD 1 connection Address" >
</a>
################################
display=10
<a href= "Ad 2 connection Address" target=_blank>
</a>

Call <?php myads ();? > Can