Ads Triggered by Keywords Used to Get To My Site From Search Engines

[Philippine Beach Resorts Blog]

i wish to show relevant ads based on keywords used by my visitors to get to my site via the search engines. certain keywords will trigger the display of ads. this is what i got so far...

Code:

<?php
$ref = getenv("HTTP_REFERER");
list ($server, $arguments) =  explode("q=", $ref);
list ($keywords, $garbage) = explode("&", $arguments);
$pattern = "\+";
$replacement = " ";
$keywords_spaces = ereg_replace($pattern, $replacement, $keywords);
?>

is this correct? i hope you guys can help me finish it. thanks!

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I remember that Nick posted a regex pattern to parse a google url, check the php forum at webdigity

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Here you are :

http://www.webdigity.com/index.php?action=tutorial;code=40

[Philippine Beach Resorts Blog]

great! what if i wish to accomodate all search engines? and how can i trigger the ads when certain keywords come up? i know i can figure this one out for myself if you guys can just point me to some examples. thanks again.

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It would be very difficult to do this for every search engine , and as in most sites the 80%+ of the search engine traffic is from google I guess it is not really important to implement it.

When you are talking about ads, do you mean adsense or something else?

[Philippine Beach Resorts Blog]

i will popunder affiliate merchant's page.

is this correct?

Code:

<?php
$ref = parse_url($_SERVER['HTTP_REFERER']);

if ( strstr($ref['host'], 'google') )
{
$qStr = urldecode(array_shift(explode('&', array_pop(explode('q=', $ref['query'])))));
echo $qStr;

 // load adwords1 list
$adwords1 = @file("adwords1.txt");

// open popunder page 1 if keyword is found in adwords1 file
if (!in_array($qStr, $adwords1)) {
                // SO HOW DO YOU OPEN POPUNDER HERE?

// load adwords2 list
$adwords2 = @file("adwords2.txt");

// open popunder page 2 if keyword is found in adwords2 file
if (!in_array($qStr, $adwords2)) {
                // SO HOW DO YOU OPEN POPUNDER HERE?
}

?>

[Philippine Beach Resorts Blog]

hey Nik,

im almost finished with the script im working on. theres just this one itty bitty part that is lacking.

Code:

 
<?php
// if for example i already obtained the keywords my surfer used to enter my site...

$keyword = "a bottle of tomato catsup";

// and i want to keep an eye out for catsup in the keywords so i will know when to display a catsup ad, how should i do it in the if/else conditional statement?

if  (array($keyword) == "catsup") {  // do you have a tutorial for this part here? this is where im facing a blank wall right now
// open an advertisement
} else {
// do nothing 
}
?>

i hope you will help me. thanks!

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check this :

http://www.webdigity.com/php-manual/function.in-array.html

[Philippine Beach Resorts Blog]

thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you

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(You are welcome)^8

[Philippine Beach Resorts Blog]

Nik, heres the code. did i do it right? i just pieced together codes from different sources.

Code:

<?php

$url = eregi_replace("http(s){0,1}(://)(www.){0,1}", "", $_SERVER["HTTP_REFERER"]);

// list of all SE's you want to search ( name => regex )
$SE = array("google" => "\.*google\.",
"alltheweb" => "alltheweb",
"msn" => "search\.msn",
"freeserver" => "search\.freeserve",
"altavista" => "altavista\.com",
"askjeeves" => "ask\.",
"hotbot" => "hotbot",
"lycos" => "search\.lycos",
"netscape" => "search\.netscape",
"aolsearch" => "aolsearch\.aol",
"yahoo" => "\.*yahoo\.",
"looksmart" => "looksmart\.com",
"dmoz" => "search\.dmoz",
"dogpile" => "dogpile\.com");

// finds keywords in url using either query, q, or p as the variable
preg_match("'(query|q|p)=(.*?)(&| )'si", " $url ", $keywords);

// find the SE that was used
foreach($SE as $name => $regex) {
if (eregi($regex, $url)) {
$se = $name;
break;
}
}

if (($keywords[1] != "") and ($keywords[1] != " ")) {
$search = array("/\+/", "/%2B/i", "/%2E/i", "%22", "%20");
$replace = array(" ", " ", "\.", "\"", " ");
$keyword = preg_replace($search, $replace, $keywords[1]);
                $keyword_array = explode(' ', $keyword);

if (in_array("catsup", $keyword_array)) {
    echo "catsup found";
   }
else {
echo "none found";
   }
}

?>

[Philippine Beach Resorts Blog]

Nik,

since i have to place the harvested keywords inside the array like this:

Code:

<?php
    $keyword = "mayonaise, catsup, mustard";
    $keyword_array = array($keyword);

if (in_array("catsup", $keyword_array)) {
    echo "catsup found";
?>

it doesnt work. but if i do it like in your example, it works. now why is that so? how will i place the harvested keywords?

sorry for the many questions Nik, i dont know any programmer... thanks!

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you should always check the manual for the right syntax:

Code:

<?php
$keyword_array = array("mayonaise", "catsup", "mustard");

if (in_array("catsup", $keyword_array)) {
    echo "catsup found";
?>

[Philippine Beach Resorts Blog]

thank you sir! olaf sir!

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thank you sir! olaf sir!

you're welcome

[Philippine Beach Resorts Blog]

one more thing byron, is it possible to dynamically insert values inside an array? from this variable taken from the search engines --> $keyword

$keyword_array = array(<--into this part here-->);

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one more thing byron, is it possible to dynamically insert values inside an array? from this variable taken from the search engines --> $keyword

$keyword_array = array(<--into this part here-->);

single:
$keyword_array[] = "value";

multiple:
http://www.php.net/array_push

[Philippine Beach Resorts Blog]

so thats what its called. i was up all night trying to figure it out. thanks again!!!

[Philippine Beach Resorts Blog]

i just cant figure out the part where i can inject the values of a variable ($keyword) into the array.

i think its too advanced for me. does anyone have a formula for this? if not thanks a lot anyway!

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what part from this code don't you understand?

$keyword_array[] = "value";