php - Using $_get on URL that is linked to id in database row -

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i'm trying $_get part of url in href. want happen when click link redirected specific link. if makes sense.

i have 2 functions:

first function, list of links:

function showposts() {     $sql = ("select * blog");     $query = mysql_query($sql);      while ($row = mysql_fetch_array($query)) {         $listid = $row["blog_id"];         $showtitle = $row["title"];         $showcontent = $row["content"];         $showtimestamp = $row["timestamp"];          echo'             <div>             <a href="index.php?option=blog&task=view&id='$listid'"><h3>'.$showtitle.'</h3></a>                 <div>'.$showcontent.'</div>                 <p>'.$showtimestamp.'</p>             </div>         ';     } }

second function, redirect link:

function viewpost() {      if(empty($_get['id']) ) {         $listid = '';        } else {         $listid = $_get['id'];     }      $sql = ("select title, content, timestamp blog blog_id='$listid'");     $query = mysql_query($sql);      while ($row = mysql_fetch_array($query)) {         $showtitle = $row["title"];         $showcontent = $row["content"];         $showtimestamp = $row["timestamp"];          echo'             <div>                 <h2>'.$showtitle.'</h2>                 <p>'.$showtimestamp.'</p>                 <div>'.$showcontent.'</div>             </div>         ';     } }

as can see i'm using $_get['id'] here , read $_get can used retrieve passed url parameters.

the way have set url defined set of variables in switch.

if(empty($_get['task']) ) {     $task = 'show';  } else {     $task = $_get['task']; }   switch ($task){     case "create":         createpost();                break;     case "save":         savepost();         break;     case "show":         showposts();         break;     case "view":         viewpost();         break;     default:    echo'something went wrong!'; }

currently when click link, redirects of content related id not there.

edit

i figured out wrong in code. in sql statement used dots(.) inside apostrophes(') separate themselfes variable. when removed dots worked fine. 

blog_id='.$listid.'

not sure why used dots in first place? :/

also removed die's in switch per instruction 1 answer.

you misusing die() command in switch. die command used handle errors, stops script execution , returns error message set argument. try removing it.


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