Place ads between text paragraphs

Question

I use the following code to place some ad code inside my content.

<?php $content = apply_filters('the_content', $post->post_content); $content = explode (' ', $content); $halfway_mark = ceil(count($content) / 2); $first_half_content = implode(' ', array_slice($content, 0, $halfway_mark)); $second_half_content = implode(' ', array_slice($content, $halfway_mark)); echo $first_half_content.'...'; echo ' YOUR ADS CODE'; echo $second_half_content; ?> 

How can I change this so that I can place 2 ads at the same time between paragraphs of text only (as in the <p>...</p> attached to the ad, there should be no images or embedded videos).

I want to avoid jQuery.

An example of my Usecase ...

• I want to insert 2 ad units in this article.
• I want the 1st ad unit to be after the 1st paragraph. But any image in the 1st paragraph should be deleted.
• For the second ad, this should be possible in the second half of the article between the paragraph only for text, so that the ad code embedded between a good amount of text and is never very close to the embedded image or video, etc.
• There must be at least 2 paragraphs between two ads

Answer 1

Here is my approach to the question. Sorry for posting a bit late (and skipping the reward :-(), but it was a busy week, so I did everything in pieces.

QUICK GUIDE

• I did not delete the attachments in the first paragraph. I really don't understand why content should be vandalized for advertising.

• I have tested quite a few checks in my code to make sure that ads are inserted only between paragraphs of text only. Only paragraphs of text are accepted as paragraphs that do not contain img, li, and ul tags.

• I correctly documented every block of code, so you can easily work through each section. I also added doc blocks that you need if necessary,

• I used wptexturize to apply p tags to the_content . Each double line break is a paragraph

• Modify and use this code as you wish. I tested it, so this is a mistake on my side.

Here is the code. Hope this works for you as expected. * PS! All this is part of your function. No other codes or models are needed for your template files.

 <?php add_filter( 'the_content', 'so_25888630_ad_between_paragraphs' ); function so_25888630_ad_between_paragraphs($content){ /**----------------------------------------------------------------------------- * * @author Pieter Goosen <http://stackoverflow.com/users/1908141/pieter-goosen> * @return Ads in between $content * @link http://stackoverflow.com/q/25888630/1908141 * * Special thanks to the following answers on my questions that helped me to * to achieve this * - http://stackoverflow.com/a/26032282/1908141 * - http://stackoverflow.com/a/25988355/1908141 * - http://stackoverflow.com/a/26010955/1908141 * - http://wordpress.stackexchange.com/a/162787/31545 * *------------------------------------------------------------------------------*/ if( in_the_loop() ){ //Simply make sure that these changes effect the main query only /**----------------------------------------------------------------------------- * * wptexturize is applied to the $content. This inserts p tags that will help to * split the text into paragraphs. The text is split into paragraphs after each * closing p tag. Remember, each double break constitutes a paragraph. * * @todo If you really need to delete the attachments in paragraph one, you want * to do it here before you start your foreach loop * *------------------------------------------------------------------------------*/ $closing_p = '</p>'; $paragraphs = explode( $closing_p, wptexturize($content) ); /**----------------------------------------------------------------------------- * * The amount of paragraphs is counted to determine add frequency. If there are * less than four paragraphs, only one ad will be placed. If the paragraph count * is more than 4, the text is split into two sections, $first and $second according * to the midpoint of the text. $totals will either contain the full text (if * paragraph count is less than 4) or an array of the two separate sections of * text * * @todo Set paragraph count to suite your needs * *------------------------------------------------------------------------------*/ $count = count( $paragraphs ); if( 4 >= $count ) { $totals = array( $paragraphs ); }else{ $midpoint = floor($count / 2); $first = array_slice($paragraphs, 0, $midpoint ); if( $count%2 == 1 ) { $second = array_slice( $paragraphs, $midpoint, $midpoint, true ); }else{ $second = array_slice( $paragraphs, $midpoint, $midpoint-1, true ); } $totals = array( $first, $second ); } $new_paras = array(); foreach ( $totals as $key_total=>$total ) { /**----------------------------------------------------------------------------- * * This is where all the important stuff happens * The first thing that is done is a work count on every paragraph * Each paragraph is is also checked if the following tags, a, li and ul exists * If any of the above tags are found or the text count is less than 10, 0 is * returned for this paragraph. ($p will hold these values for later checking) * If none of the above conditions are true, 1 will be returned. 1 will represent * paragraphs that qualify for add insertion, and these will determine where an ad * will go * returned for this paragraph. ($p will hold these values for later checking) * * @todo You can delete or add rules here to your liking * *------------------------------------------------------------------------------*/ $p = array(); foreach ( $total as $key_paras=>$paragraph ) { $word_count = count(explode(' ', $paragraph)); if( preg_match( '~<(?:img|ul|li)[ >]~', $paragraph ) || $word_count < 10 ) { $p[$key_paras] = 0; }else{ $p[$key_paras] = 1; } } /**----------------------------------------------------------------------------- * * Return a position where an add will be inserted * This code checks if there are two adjacent 1's, and then return the second key * The ad will be inserted between these keys * If there are no two adjacent 1's, "no_ad" is returned into array $m * This means that no ad will be inserted in that section * *------------------------------------------------------------------------------*/ $m = array(); foreach ( $p as $key=>$value ) { if( 1 === $value && array_key_exists( $key-1, $p ) && $p[$key] === $p[$key-1] && !$m){ $m[] = $key; }elseif( !array_key_exists( $key+1, $p ) && !$m ) { $m[] = 'no-ad'; } } /**----------------------------------------------------------------------------- * * Use two different ads, one for each section * Only ad1 is displayed if there is less than 4 paragraphs * * @todo Replace "PLACE YOUR ADD NO 1 HERE" with your add or code. Leave p tags * @todo I will try to insert widgets here to make it dynamic * *------------------------------------------------------------------------------*/ if( $key_total == 0 ){ $ad = array( 'ad1' => '<p>PLACE YOUR ADD NO 1 HERE</p>' ); }else{ $ad = array( 'ad2' => '<p>PLACE YOUR ADD NO 2 HERE</p>' ); } /**----------------------------------------------------------------------------- * * This code loops through all the paragraphs and checks each key against $mail * and $key_para * Each paragraph is returned to an array called $new_paras. $new_paras will * hold the new content that will be passed to $content. * If a key matches the value of $m (which holds the array key of the position * where an ad should be inserted) an add is inserted. If $m holds a value of * 'no_ad', no ad will be inserted * *------------------------------------------------------------------------------*/ foreach ( $total as $key_para=>$para ) { if( !in_array( 'no_ad', $m ) && $key_para === $m[0] ){ $new_paras[key($ad)] = $ad[key($ad)]; $new_paras[$key_para] = $para; }else{ $new_paras[$key_para] = $para; } } } /**----------------------------------------------------------------------------- * * $content should be a string, not an array. $new_paras is an array, which will * not work. $new_paras are converted to a string with implode, and then passed * to $content which will be our new content * *------------------------------------------------------------------------------*/ $content = implode( ' ', $new_paras ); } return $content; } 

EDIT

From your comments:

• For debugging <pre><?php var_dump($NAME_OF_VARIABLE); ?></pre> <pre><?php var_dump($NAME_OF_VARIABLE); ?></pre> you should use the following code. For your first problem, I will use ?><pre><?php var_dump($paragraphs); ?></pre><?php ?><pre><?php var_dump($paragraphs); ?></pre><?php immediately after this line $paragraphs = explode( $closing_p, wpautop($content) ); to see exactly how the content is broken. This will give you an idea of ​​whether your content is correctly arranged.

• Also use ?><pre><?php var_dump($p); ?></pre><?php ?><pre><?php var_dump($p); ?></pre><?php immediately after this line $p = array(); to check what value is assigned to a particular paragraph. Remember that paragraphs with img, li, and ul tags must have 0 , as well as paragraphs with less than 10 words. The rest should have 1

• EDIT → Problem with split paragraphs resolved. Thanks for pointing out this error. I never realized this. I updated the code, so just copy and paste it

EDIT 2

Please note: you cannot test your code with the online tool you use. This is not a true reflection of what the_content() is the_content() . The output that you see with your online tool is filtered and flagged before being sent to the screen as the_content() . If you check your output with a browser such as google chrome, you will see that p tags are correctly applied.

I also changed the tag with the image tag in the code

Answer 2

with the sample code that you gave me, this is the best I can do, there were too many images, you need a genius to figure out the logic required for your requirements, but try it, maybe be too far away. For this you need php 5.5.

some notes:
1. He identifies paragraphs as wrapped in p elements, and not as visual paragraphs.
2. If p elements exist inside other elements, they also recognize them as paragraphs. An example of this is the first ad. Avoid using p inside blockquotes, lists, etc. This is optional, use spaces, divs for text. 3. I commented out the line calling the function in __construct, uncomment it to insert the second image. This works really well, but there are many p elements in your content with prices of several p, this is unlikely to be a factor in the actual content.
4. He searches for images in paragraph 1 + pair 2 and deletes them.

 $content = apply_filters('the_content', get_the_content() ); class adinsert { var $content; var $paragraphs; var $ad_pos1=2; var $ad_pos2; var $ad_pos3; var $ad= '<h1>ad position here</h1>'; public function __construct($content) { if(!$content) return $content; $this->set_content($content); $this->paragrapherize(2); $this->paragraph_numbers(); $this->get_first_pos(); $this->paragrapherize(); $this->paragraph_numbers(); $this->find_images(); $this->find_ad_pos(); $this->insert_ads(); } public function echo_content(){ echo $this->content; } private function insert_ads() { if($this->ad_pos2 && $this->ad_pos2 != 'end'): $posb= $this->ad_pos2; $this->content=substr_replace($this->content,$this->ad,$posb ,0); else: $this->content.= $this->ad; endif; //comment the below line to remove last image insertion $this->content.= $this->ad; } private function get_first_pos() { $i=0; foreach($this->paragraphs as $key=>$data): if($i==0): $length= $data['end']-$data['start']; $string= substr($this->content, $data['start'],$length); $newkey= $key+1; $lengthb= $this->paragraphs[$newkey]['end']-$this->paragraphs[$newkey]['start']; $stringb= substr($this->content, $this->paragraphs[$newkey]['start'],$lengthb); $wcount= count(explode(' ', $string)); if( preg_match('/(<img[^>]+>)/i', $string, $image) ): $newstring=preg_replace('/(<img[^>]+>)/i', '', $string); if($wcount>10): $newstring.=$this->ad; $this->ad_pos1=1; $this->content=str_replace($string,$newstring,$this->content); endif; else: if($wcount>10) : $newstring=$string.$this->ad; echo $newstring; $this->ad_pos1=1; //$this->content=str_replace($string,$newstring,$this->content); $this->content= preg_replace('~'.$string.'~', $newstring, $this->content, 1); endif; endif; if( preg_match('/(<img[^>]+>)/i', $stringb, $imageb) ): $newstringb=preg_replace('/(<img[^>]+>)/i', '', $stringb); if($wcount<10) : $newstringb.=$this->ad; $this->ad_pos1=2; $this->content=str_replace($stringb,$newstringb,$this->content); endif; else: if($wcount<10) : $newstring=$stringb.$this->ad; $this->ad_pos1=2; $this->content=str_replace($stringb,$newstringb,$this->content); endif; endif; else: break; endif; $i++; endforeach; } private function find_ad_pos() { $remainder_images= $this->paragraph_count; if($remainder_images < $this->ad_pos1 + 3): $this->ad_pos2='end'; else: foreach($this->paragraphs as $key=>$data): $p[]=$key; endforeach; unset($p[0]); unset($p[1]); $startpos= $this->ad_pos1 + 2; $possible_ad_positions= $remainder_images - $startpos; //figure out half way if($remainder_images < 3): //use end pos $pos1= $startpos; $pos1=$this->getclosestkey($pos1, $p); else: // dont use end pos $pos1= ($remainder_images/2)-1; $pos1= $this->getclosestkey($pos1, $p); endif; $this->ad_pos2= $this->paragraphs[$pos1]['end']; endif; } private function getclosestkey($key, $keys) { $close= 0; foreach($keys as $item): //4>4 if($close == null || $key - $close > $item - $key ) : $close = $item; endif; endforeach; return $close; } private function find_images() { foreach($this->paragraphs as $item=>$key): $length= $key['end']-$key['start']; $string= substr($this->content, $key['start'],$length); if(strpos($string,'src')!==false && $item !=0 && $item !=1): //unset the number, find start in paragraphs array + 1 after unset($this->paragraphs[$item]); $nextitem= $item+1; $previtem= $item-1; unset($this->paragraphs[$nextitem]); unset($this->paragraphs[$previtem]); endif; endforeach; } private function paragraph_numbers() { $i=1; foreach($this->paragraphs as $item): $i++; endforeach; $this->paragraph_count=$i; } private function paragrapherize($limit=0) { $current_pos=0; $i=0; while( strpos($this->content, '<p', $current_pos) !== false ): if($limit && $i==$limit) break; if($i==105) { break; } if($i!=0) { $current_pos++; } $paragraph[$i]['start']=strpos($this->content, '<p', $current_pos);//1 //looking for the next time a /p follows a /p so is less than the next position of p $nextp= strpos($this->content, '<p', $paragraph[$i]['start']+1); //14 failing on next??? $nextendp= strpos($this->content, '</p>', $current_pos);//22 if($nextp>$nextendp)://NO $paragraph[$i]['end']=$nextendp; if( ($nextendp - $paragraph[$i]['start']) < 80 ): unset($paragraph[$i]); endif; $current_pos= $nextendp; $i++; else: $startipos = $nextendp; $b=0; do { if($b==100){ break; } $nextp= strpos($this->content, '<p', $startipos); //230 $nextendp= strpos($this->content, '</p>', $startipos+1);//224 if($nextp>$nextendp) { $paragraph[$i]['end']=$nextendp; $current_pos= $nextendp; $i++; } else { $startipos = $nextendp+1; } $b++; } while ($nextp < $nextendp ); endif; endwhile; $this->paragraphs= $paragraph; } public function set_content($content) { $this->content= $content; } } $newcontent= new adinsert($content); 

then you want to display your content

  <?php echo $newcontent->echo_content(); ?> 

Answer 3

This is one solution. It is not fully software, but I have done it before and it will work. Basically, use a "short code." The problem with its full software is that there is no good way to find if there will be an article stream with embedded images, videos, etc. Make your ad placements look very bad. Instead, customize your CMS with short code so that editors can place ads in the optimal place in the article.

eg.

 <p>Bacon ipsum dolor sit amet short ribs tenderloin venison pastrami meatloaf kevin, shoulder meatball landjaeger pork corned beef turkey salami frankfurter jerky. Pork loin bresaola porchetta strip steak meatball t-bone andouille chuck chicken shankle shank tongue. Hamburger flank kevin short ribs. Pork loin landjaeger frankfurter corned beef, fatback salami short loin ground round biltong.</p> [ad_block] <p>Pastrami jerky drumstick swine ribeye strip steak pork belly kevin tail rump pancetta capicola. Meatloaf doner porchetta, rump tenderloin t-bone biltong pork belly. Porchetta boudin ham ribeye frankfurter flank short loin, drumstick pork loin filet mignon chuck fatback. Strip steak jowl capicola ham hock turducken biltong ground round filet mignon venison prosciutto chuck pork. Venison ribeye fatback kielbasa, ball tip turducken capicola drumstick sausage pancetta boudin turkey ham strip steak corned beef.</p> 

Then, using PHP str_replace , you can simply change your ad_block code to your HTML for your ads.

eg.

 echo str_replace('[ad_block]', $ad_block_html, $content); 

Answer 4

I did a little work, and this is what I finally got. Feel free to test and give me some feedback.

 class Advertiser { /** * All advertises to place * * @access private * @var array */ private $ads = array(); /** * The position behind the </p> element nearest to the center * * @access private * @var int */ private $center = null; /** * The content to parse * * @access private * @var string */ private $content = null; /** * Constructor method * * @access public * @param string $content the content to parse (optional) * @param array $ads all advertises to place (optional) * @return object itself as object */ public function __construct ($content = null, $ads = array()) { if (count($ads)) $this->ads = $ads; if ($content) $this->setContent($content); return $this; } /** * Calculates and sets the position behind the </p> element nearest to the center * * @access public * @return object the position behind the </p> element nearest to the center */ public function calcCenter () { $content = $this->content; if (!$content) return $this; $center = ceil(strlen($content)/2); $rlpos = strripos(substr($content, 0, $center), '</p>'); $rrpos = stripos($content, '</p>', $center); $this->center = 4 + ($center-$rlpos <= $rrpos-$center ? $rlpos : $rrpos); return $this; } /** * Places the first ad * * @access public * @param string $ad optional; if not specified, take the internally setted ad * @return object itself as object */ public function placeFirstAd ($ad = null) { $ad = $ad ? $ad : $this->ads[0]; $content = $this->content; if (!$content || !$ad) return $this; // the position before and after the first paragraph $pos1 = strpos($content, '<p'); $pos2 = strpos($content, '</p>') + 4; // place ad $content = substr($content, 0, $pos2) . $ad . substr($content, $pos2); // strip images $content = substr($content, 0, $pos1) . preg_replace('#<img(?:\s.*?)?/?>#i', '', substr($content, $pos1, $pos2)) . substr($content, $pos2); $this->content = $content; return $this; } /** * Places the second ad * * @access public * @param string $ad optional; if not specified, take the internally set ad * @return object itself as object */ public function placeSecondAd ($ad = null) { $ad = $ad ? $ad : $this->ads[1]; $content = $this->content; if (!$content || !$ad) return $this; $center = $this->center; // place ad $content = substr($content, 0, $center) . $ad . substr($content, $center); $this->content = $content; return $this; } /* Getters */ /** * Gets the content in it current state * * @access public * @return string the content in it current state */ public function getContent () { return $this->content; } /* Setters */ /** * Sets the content * * @access public * @param string $content the content to parse * @return object itself as object */ public function setContent ($content) { $this->content = $content; $this->calcCenter(); return $this; } /** * Sets the first ad * * @access public * @param string $ad the ad * @return object itself as object */ public function setFirstAd ($ad) { if ($ad) $this->ad[0] = $ad; return $this; } /** * Sets the second ad * * @access public * @param string $ad the ad * @return object itself as object */ public function setSecondAd ($ad) { if ($ad) $this->ad[1] = $ad; return $this; } } 

Usage example:

 $first_ad = 'bacon'; $second_ad = 'ham'; $content = apply_filters('the_content', $post->post_content); $advertiser = new Advertiser($content); $advertiser->placeFirstAd($first_ad); //$advertiser-> placeSecondAd($second_ad); $advertised_content = $advertiser->getContent(); 

You can comment on placeSecondAd () or replace it with your working function.

Answer 5

Here is a smart way:

 $content = "<p>A</p><p>B</p><p>C</p><p>D</p>"; $pos = 2; $content = preg_replace('/<p>/', '<hrd>', $content, $pos + 1); //<hrd>A</p><hrd>B</p><hrd>C</p><p>D</p> $content = preg_replace('/<hrd>/', '<p>', $content, $pos); //<p>A</p><p>B</p><hrd>C</p><p>D</p> $content = str_replace("<hrd>", "<p>ad</p><p>", $content); //<p>A</p><p>B</p><p>ad</p><p>C</p><p>D</p> 

Here is the full function:

 function insertAd($content, $ad, $pos = 0){ // $pos = 0 means randomly position in the content $count = substr_count($content, "<p>"); if($count == 0 or $count <= $pos){ return $content; } else{ if($pos == 0){ $pos = rand (1, $count - 1); } $content = preg_replace('/<p>/', '<hrd>', $content, $pos + 1); $content = preg_replace('/<hrd>/', '<p>', $content, $pos); $content = str_replace('<hrd>', $ad . "\n<p>", $content); return $content; } } 

Answer 6

Well, this is the idea of ​​moving you (possibly) to the side closer to the fully software way you ask ...

Use the HTML DOM parser, for example http://simplehtmldom.sourceforge.net/ , to parse each article. Using this, you should theoretically be able to select all paragraph tags and then insert ad units between the right ones based on your math.

 $html = str_get_html($content); $paragraphs_arr = $html->find('p'); //Returns all paragraphs $halfway_mark = ceil(count($paragraphs_arr) / 2); $halfway_paragraph = $paragraphs_arr[$halfway_mark]; // Somewhere here now you just have to figure out how to inject the ad right after the halfway paragraph. Eg $p_content = $halfway_paragraph->innertext(); $p_content = $p_content."</p><p><!-- Ad --></p>"; // Force close the tag as we're in the innertext. $halfway_paragraph->innertext($p_content); 

Is this a little closer to what you are trying to do?

Answer 7

Use

  strip_tags('contnet','like <p>'); 

Answer 8

 $content = apply_filters('the_content', $post->post_content); // $middle will mark the center of the $content based on number of characters and is aware of words and will therefor mark the middle to the nearest space. +1 is added to then remove the whitespace at the end of the string. $middle = strrpos(substr($content, 0, floor(strlen($content) / 2)), ' ') + 1; // $first_half will substring the text to the first half based on where $middle says to split it $first_half= substr($text, 0, $middle); // $second_half substrings the text to the seconf half based on where $first_half is split. $second_half= substr($text, $middle); echo $first_half.'...'; echo ' YOUR ADS CODE'; echo $second_half;