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1. temporaneoit
   Member
   Posted 2 years ago #

   Hi all and thank you in advance.

   The problem: I do not know how to check if a Post Id exists.

   I wrote some code inside "single.php" to show "related posts" based upon "custom values" (the id's separated by "|") in a "custom field".

   The id's are not checked in the "Edit Post" page; it is only a string like this "12|44|67", freely written by me. I parse the string to obtain the single components - for example "12" "44" "67".

   Before printing the list of related posts by a loop, I have to check if those id's exist.

   The code in the following:

   $ids_related_arr=get_post_custom_values('ids_related'); // ids_related contains for examples 12|44|67
   if(isset($ids_related_arr)){
   	foreach($ids_related_arr as $key=>$value){
   		$ids_arr=explode('|',$value);
   		foreach($ids_arr as $key_id=>$value_id){
   			if(/* the Post with Id=$value_id exists */){
   				// write the link to the post
   			};
   		};
   	};
   };

2. alchymyth
   The Sweeper
   Posted 2 years ago #

   this might work:

   foreach($ids_arr as $key_id=>$value_id){
      $rel_post_id = $key_id=>$value_id;
      $rel_post = get_posts('p='.$rel_post_id) ;
      if($rel_post) {
         // write the link to the post
      };
   };

3. temporaneoit
   Member
   Posted 2 years ago #

   Dear alchymyth,
   thank you very much!

   I had only to change
   $rel_post_id = $key_id=>$value_id;
   into
   $rel_post_id = $value_id;

   Than you again.

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