" . __("Settings") . "";
array_unshift($links, $link);
}
return $links;
}
function adinj_options($reset=false){
global $adinj_data;
if (empty($adinj_data) || $reset !== false){
$adinj_data = get_option('adinj_options');
}
return $adinj_data;
}
function adinj_option($option){
$ops = adinj_options();
return $ops[$option];
}
// TODO make the cookie domain from wp-config.php accessible to script
//$cookie_domain = COOKIE_DOMAIN; // TODO test
//var adinj_cookie_domain = "$cookie_domain"; //JS line. TODO test
function adinj_print_referrers_hook(){
// TODO can re-enable this check once the widget ads are factored in.
//if (adinj_ads_completely_disabled_from_page()) return;
if (adinj_ticked('sevisitors_only')){
$referrer_list = adinj_quote_list('ad_referrers');
echo <<
SCRIPT;
}
}
function adinj_quote_list($option){
$ops = adinj_options();
$list = $ops[$option];
// I'm sure this whole thing could be done with a much simpler single
// line of PHP - but right now my brain isn't up to thinking about it!
$lines = explode("\n", $list);
foreach ($lines as $line){
$stripped_lines[] = preg_replace("/\/\/.*/", "", $line);
}
$list = implode(" ", $stripped_lines);
$list = preg_replace("/'/", "", $list);
$referrers = preg_split("/[\s,]+/", $list);
foreach ($referrers as $referrer){
$newlist[] = "'" . $referrer . "'";
}
return implode(", ", $newlist);
}
function adinj_addsevjs_hook(){
// TODO can re-enable this check once the widget ads are factored in.
//if (adinj_ads_completely_disabled_from_page()) return;
if (!adinj_ticked('sevisitors_only')) return;
// Put the search engine detection / cookie setting script in the footer
wp_enqueue_script('adinj_sev', WP_PLUGIN_URL.'/ad-injection/adinj-sev.js', NULL, NULL, true);
}
function adinj_get_mfunc_code($adfile){
return "\n
";
}
function adinj_ad_code_eval($ad){
if (stripos($ad, '
";
}
return adinj_eval_php($ad);
}
function adinj_add_tags($ad, $prefix, $func=NULL){
$ops = adinj_options();
if ($ops[$prefix . 'align'] !== ADINJ_RULE_DISABLED ||
$ops[$prefix . 'margin_top'] !== ADINJ_RULE_DISABLED ||
$ops[$prefix . 'margin_bottom'] !== ADINJ_RULE_DISABLED) {
$top = "";
$bottom = "";
if ($ops[$prefix . 'margin_top'] !== ADINJ_RULE_DISABLED) $top="margin-top:" . $ops[$prefix . 'margin_top'] . "px;";
if ($ops[$prefix . 'margin_bottom'] !== ADINJ_RULE_DISABLED) $bottom="margin-bottom:" . $ops[$prefix . 'margin_bottom'] . "px;";
if ($ops[$prefix . 'align'] == 'left'){
$div = "ADCODE
";
} else if ($ops[$prefix . 'align'] == 'center'){
$div = "ADCODE";
} else if ($ops[$prefix . 'align'] == 'right'){
$div = "ADCODE
";
} else if ($ops[$prefix . 'align'] == 'float left'){
$div = "ADCODE
";
} else if ($ops[$prefix . 'align'] == 'float right'){
$div = "ADCODE
";
} else {
$div = "ADCODE
";
}
if (empty($func)){
return str_replace("ADCODE", $ad, $div);
} else {
$ad = str_replace("ADCODE", "\$ad", $div);
return "function $func(\$ad) { return \"$ad\"; }";
}
}
if (!empty($func)){
return "function $func(\$ad){return \$ad;}";
}
return $ad;
}
function adinj_ad_code_random(){
$ops = adinj_options();
$ad = "";
if ($ops['ad_insertion_mode'] == 'mfunc'){
$ad = adinj_get_mfunc_code(ADINJ_AD_RANDOM_FILE);
} else {
$ad = $ops['ad_code_random_1'];
$ad = adinj_add_tags($ad, 'rnd_');
}
return adinj_ad_code_eval($ad);
}
function adinj_ad_code_top(){
global $adinj_total_all_ads_used;
++$adinj_total_all_ads_used;
$ops = adinj_options();
$ad = "";
if ($ops['ad_insertion_mode'] == 'mfunc'){
$ad = adinj_get_mfunc_code(ADINJ_AD_TOP_FILE);
} else {
$ad = $ops['ad_code_top_1'];
$ad = adinj_add_tags($ad, 'top_');
}
return adinj_ad_code_eval($ad);
}
function adinj_ad_code_bottom(){
global $adinj_total_all_ads_used;
++$adinj_total_all_ads_used;
$ops = adinj_options();
$ad = "";
if ($ops['ad_insertion_mode'] == 'mfunc'){
$ad = adinj_get_mfunc_code(ADINJ_AD_BOTTOM_FILE);
} else {
$ad = $ops['ad_code_bottom_1'];
$ad = adinj_add_tags($ad, 'bottom_');
}
return adinj_ad_code_eval($ad);
}
function read_ad_from_file($ad_path){
$contents = "";
if (file_exists($ad_path)){
$contents = file_get_contents($ad_path);
if ($contents === false) return "Error: can't read from file: $ad_path";
}
return $contents;
}
// Based on: http://www.wprecipes.com/wordpress-hack-how-to-display-ads-on-old-posts-only
// Only use for pages and posts. Not for archives, categories, home page, etc.
function adinj_is_old_post(){
$ops = adinj_options();
$days = $ops['ads_on_page_older_than'];
if ($days == 0) return true;
if(is_single() || is_page()) {
$current_date = time();
$offset = $days * 60*60*24;
$post_date = get_the_time('U');
if(($post_date + $offset) > $current_date){
return false;
} else {
return true;
}
}
return false;
}
function adinj_adverts_disabled_flag(){
$custom_fields = get_post_custom();
if (isset($custom_fields['disable_adverts'])){
$disable_adverts = $custom_fields['disable_adverts'];
return ($disable_adverts[0] == 1);
}
return 0;
}
//////////For runtime ads - i.e. when caching is off and config.php not loaded
function adinj_search_engine_referrers(){
$list = adinj_quote_list('ad_referrers');
return preg_split("/[,'\s*]/", $list);
}
function adinj_blocked_ips(){
$list = adinj_quote_list('blocked_ips');
return preg_split("/[,'\s*]/", $list);
}
function adinj_fromasearchengine(){
$referrer = $_SERVER['HTTP_REFERER'];
$searchengines = adinj_search_engine_referrers();
foreach ($searchengines as $se) {
if (stripos($referrer, $se) !== false) {
return true;
}
}
// Also return true if the visitor has recently come from a search engine
// and has the adinj cookie set.
return ($_COOKIE["adinj"]==1);
}
function adinj_blocked_ip(){
$visitorIP = $_SERVER['REMOTE_ADDR'];
return in_array($visitorIP, adinj_blocked_ips());
}
function adinj_show_adverts(){
if (adinj_blocked_ip()){
return "blockedip";
}
if (adinj_ticked('sevisitors_only')){
if (!adinj_fromasearchengine()){
return "blockedreferrer";
}
}
return true;
}
// From: Exec-PHP plugin
function adinj_eval_php($code) {
if (strlen($code) == 0) return $code;
ob_start();
eval("?>$code\n";
}
function adinj_ads_completely_disabled_from_page($content=NULL){
$ops = adinj_options();
if ($ops['ads_enabled'] == 'off' ||
$ops['ads_enabled'] == ''){
return "NOADS: Ads are not switched on";
}
if ($ops['ads_enabled'] == 'test' && !current_user_can('activate_plugins')){
return "NOADS: test mode enabled - ads only shown admins";
}
// check for ads on certain page types being disabled
if ((is_home() && adinj_ticked('exclude_home')) ||
(is_page() && adinj_ticked('exclude_page')) ||
(is_single() && adinj_ticked('exclude_single')) ||
(is_archive() && adinj_ticked('exclude_archive')) ||
is_search() || is_404()){
return "NOADS: excluded from this post type-".get_post_type();
}
// if disable_adverts==1
if (adinj_adverts_disabled_flag()) return "NOADS: adverts_disabled_flag";
// no ads on old posts/pages if rule is enabled
if((is_page() || is_single()) && !adinj_is_old_post()) return "NOADS: !is_old_post";
if ($content == NULL){
return false;
}
// manual ad disabling tags
if (strpos($content, "") !== false) return "NOADS: noadsense tag"; // 'Adsense Injection' tag
if (strpos($content, "") !== false) return "NOADS: no-adsense tag"; // 'Whydowork Adsense' tag
if (stripos($content,'') !== false) return "NOADS: NoAds tag"; // 'Quick Adsense' tag
if (stripos($content,'') !== false) return "NOADS: OffAds tag"; // 'Quick Adsense' tag
return false;
}
function adinj_inject_hook($content){
if (is_feed()) return $content;
$reason = adinj_ads_completely_disabled_from_page($content);
if ($reason !== false){
return adinj($content, $reason);
}
$ops = adinj_options();
if ($ops['ad_insertion_mode'] == 'direct_dynamic'){
$showads = adinj_show_adverts();
if ($showads !== true){
return adinj($content, "NOADS: ad blocked at run time reason=$showads");
}
}
$ad_include = adinj_ad_code_include();
# Ad sandwich mode
if(is_page() || is_single()){
if(stripos($content, "") !== false) return adinj($ad_include.adinj_ad_code_top().$content.adinj_ad_code_bottom(), "Ads=adsandwich");
if(stripos($content, "") !== false) return adinj($content.$ad_include.adinj_ad_code_bottom(), "Ads=adfooter");
}
# Insert top and bottom ads if necesary
$length = strlen($content);
if(is_page() || is_single()){
if (adinj_do_rule_if($ops['top_ad_if_longer_than'], '<', $length)){
$content = $ad_include.adinj_ad_code_top().$content;
$ad_include = false;
}
if (adinj_do_rule_if($ops['bottom_ad_if_longer_than'], '<', $length)){
$content = $content.adinj_ad_code_bottom();
}
}
$num_rand_ads_to_insert = adinj_num_rand_ads_to_insert($length);
if ($num_rand_ads_to_insert <= 0) return adinj($content, "all ads used up");
if ($ad_include !== false) $content = $ad_include.$content;
$debug_on = $ops['debug_mode'];
if (!$debug_on) $debugtags=false;
$content_adfree_header = "";
$content_adfree_footer = "";
// TODO add docs explaining the significance of leaving blank lines
// before or after these tags
# 'Adsense Injection' tag compatibility
$split = adinj_split_by_tag($content, "", $debugtags);
if (count($split) == 2){
$content_adfree_header = $split[0];
$content = $split[1];
}
# Use the same naming convention for the end tag
$split = adinj_split_by_tag($content, "", $debugtags);
if (count($split) == 2){
$content = $split[0];
$content_adfree_footer = $split[1];
}
$split = adinj_split_by_tag($content, "", $debugtags);
if (count($split) == 2){
$content_adfree_header = $split[0];
$content = $split[1];
}
$split = adinj_split_by_tag($content, "", $debugtags);
if (count($split) == 2){
$content = $split[0];
$content_adfree_footer = $split[1];
}
// TODO add note explaining that start tags are processed before the 'first
// paragraph ad
// Move onto random ad insertions
$paragraphmarker = "";
if(stripos($content, $paragraphmarker) === false) return adinj($content, "no </p> tags");
if ($debug_on) $debug = "\nTags=". htmlentities($debugtags);
// Generate a list of all potential injection points
if ($debug_on) $debug .= "\nPotential positions: ";
$potential_inj_positions = array();
$prevpos = -1;
while(($prevpos = stripos($content, $paragraphmarker, $prevpos+1)) !== false){
$potential_inj_positions[] = $prevpos + strlen($paragraphmarker);
if ($debug_on) $debug .= $prevpos.", ";
}
if ($debug_on) $debug .= "\npotential_inj_positions:".sizeof($potential_inj_positions);
if (sizeof($potential_inj_positions) == 0){
return adinj($content, "Error: no potential inj positions");
}
$inj_positions = array();
if (adinj_ticked('first_paragraph_ad')){
$inj_positions[] = array_shift($potential_inj_positions);
--$num_rand_ads_to_insert;
}
// Pick the correct number of random injection points
if (sizeof($potential_inj_positions) > 0 && $num_rand_ads_to_insert > 0){
if (!adinj_ticked('multiple_ads_at_same_position')){
// Each ad is inserted into a unique position
if (sizeof($potential_inj_positions) < $num_rand_ads_to_insert){
$debug .= "\nnum_rand_ads_to_insert requested=$num_rand_ads_to_insert. But restricted to ". sizeof($potential_inj_positions) . " due to limited injection points.";
$num_rand_ads_to_insert = sizeof($potential_inj_positions);
}
$rand_positions = array_rand(array_flip($potential_inj_positions), $num_rand_ads_to_insert);
if ($num_rand_ads_to_insert == 1){
// Convert it back into an array
$inj_positions[] = $rand_positions;
} else {
$inj_positions = array_merge($inj_positions, $rand_positions);
}
foreach($inj_positions as $pos){
if ($debug_on) $debug = $pos . ", " . $debug;
}
} else {
// Multiple ads may be inserted at the same position
$injections = 0;
while($injections++ < $num_rand_ads_to_insert){
$rnd = array_rand($potential_inj_positions);
if ($debug_on) $debug = $potential_inj_positions[$rnd] . ", " . $debug;
$inj_positions[] = $potential_inj_positions[$rnd];
}
}
}
if (sizeof($inj_positions) == 0){
return adinj($content_adfree_header.$content.$content_adfree_footer, "Error: No ad injection positions: " . $debug);
}
// Sort positions
sort($inj_positions);
// Insert ads in reverse order
$ad = adinj_ad_code_random();
global $adinj_total_rand_ads_used, $adinj_total_all_ads_used;
for ($adnum=sizeof($inj_positions)-1; $adnum>=0; $adnum--){
$content = substr_replace($content, $ad, $inj_positions[$adnum], 0);
++$adinj_total_rand_ads_used;
++$adinj_total_all_ads_used;
}
return adinj($content_adfree_header.$content.$content_adfree_footer, "Ads injected: " . $debug);
}
function adinj_split_by_tag($content, $tag, &$debugtags){
$ret = array();
if (strpos($content, $tag) !== false){
if ($debugtags !== false) $debugtags .= "$tag, ";
$content_split = explode($tag, $content, 2);
$ret[] = $content_split[0];
if (count($content_split) == 2){
$ret[] = $content_split[1];
}
}
return $ret;
}
function adinj_num_rand_ads_to_insert($content_length){
global $adinj_total_rand_ads_used; // a page can be more than one post
$ops = adinj_options();
if (is_single() || is_page()){
$max_num_rand_ads_to_insert = $ops['max_num_of_ads'] - $adinj_total_rand_ads_used;
} else if (is_home()){
$max_num_rand_ads_to_insert = $ops['max_num_of_ads_home_page'] - $adinj_total_rand_ads_used;
} else {
return 0;
//TODO Allow ads in other page types later
}
if ($max_num_rand_ads_to_insert <= 0) {
return 0;
}
if(!is_single() && !is_page()) {
// If there are multiple posts on page only show one ad per post
// This rule from 'Adsense Injection'.
return 1;
}
$length = $content_length;
if (adinj_do_rule_if($ops['no_random_ads_if_shorter_than'], '>', $length)){
return 0;
}
if (adinj_do_rule_if($ops['one_ad_if_shorter_than'], '>', $length)){
return 1;
}
if (adinj_do_rule_if($ops['two_ads_if_shorter_than'], '>', $length)){
return min(2, $max_num_rand_ads_to_insert);
}
if (adinj_do_rule_if($ops['three_ads_if_shorter_than'], '>', $length)){
return min(3, $max_num_rand_ads_to_insert);
}
return $max_num_rand_ads_to_insert;
}
function adinj_do_rule_if($rule_value, $condition, $content_length){
if ($rule_value == ADINJ_ALWAYS_SHOW) return true;
if ($condition == '>'){
return ($rule_value != ADINJ_RULE_DISABLED && $rule_value > $content_length);
} else if ($condition == '<'){
return ($rule_value != ADINJ_RULE_DISABLED && $rule_value < $content_length);
} else {
die("adinj_do_rule_if bad condition: $condition");
}
}
function adinj_ticked($option){
$ops = adinj_options();
if (!empty($ops[$option])) return 'checked="checked"';
return false;
}
// Widget support
require_once('ad-injection-widget.php');
add_action('widgets_init', 'adinj_widgets_init');
function adinj_widgets_init() {
register_widget('Ad_Injection_Widget');
}
// activate
register_activation_hook(__FILE__, 'adinj_activate_hook');
// Content injection
add_action('wp_enqueue_scripts', 'adinj_addsevjs_hook');
add_filter('the_content', 'adinj_inject_hook');
add_action('wp_footer', 'adinj_print_referrers_hook');
?>