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POHow do I set a header() and echo an image using CodeIgniter?
 

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  1. POHow do I set a header() and echo an image using CodeIgniter?
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    <p>I've written a method to set a header() to the appropriate file type of an upload stored in a database and then I would like to echo() the file.</p> <p>The method is as follows inside a controller:</p> <pre><code>function view_upload( $id = 0 ) { $id = $this-&gt;db-&gt;escape( $id ); $query = $this-&gt;db-&gt;query( "SELECT file_type FROM media WHERE id = $id" )-&gt;row(); $query2 = $this-&gt;db-&gt;query( "SELECT file FROM media WHERE id = $id" )-&gt;row(); header("Content-type: ".$query-&gt;file_type); //die( "moo" ); echo( $query2-&gt;file ); } </code></pre> <p>Strangely as soon as I set the header() the rest of the method seems to be ignored, for example, if I uncomment the die() statement it doesn't die and it doesn't echo the image. If I remove the header() call I see the raw upload blob presented to the screen..</p> <p>Is this something to do with CodeIgniter or have I made a PHP mistake?</p> <p>EDIT:</p> <p>I've changed the function and put it in a separate file outside of CodeIgniter but if I browse to it and pass in an $id it still doesn't display the image...</p> <pre><code>&lt;?php // just so we know it is broken error_reporting(E_ALL); // some basic sanity checks if(isset($_GET['id']) &amp;&amp; is_numeric($_GET['id'])) { //connect to the db $link = mysql_connect("localhost", "user", "pass") or die("Could not connect: " . mysql_error()); // select our database mysql_select_db("database") or die(mysql_error()); $id = $_GET['id']; // get the file from the db $sql = "SELECT file FROM media WHERE id=$id"; // the result of the query $result = mysql_query("$sql") or die("Invalid query: " . mysql_error()); // get the file_type from the db $sql = "SELECT file_type FROM media WHERE id=$id"; // the result of the query $result2 = mysql_query("$sql") or die("Invalid query: " . mysql_error()); // set the header for the image //ob_clean(); //die( mysql_result($result, 0) ); //header('Content-type:'.mysql_result($result2, 0)); header('Content-type: image/png'); //ob_clean(); echo mysql_result($result, 0); // close the db link mysql_close($link); } else { echo 'Please use a real id number'; } ?&gt; </code></pre> <p>die() on the two $result produces what I would expect but it's not displaying the page in the browser. Again if I add ob_clean() it says:</p> <p><code>ob_clean() [&lt;a href='ref.outcontrol'&gt;ref.outcontrol&lt;/a&gt;]: failed to delete buffer. No buffer to delete.</code></p> <p>I've copied the code from here: <a href="http://www.phpriot.com/articles/images-in-mysql/8" rel="nofollow noreferrer"><a href="http://www.phpriot.com/articles/images-in-mysql/8" rel="nofollow noreferrer">http://www.phpriot.com/articles/images-in-mysql/8</a></a> if that helps at all..</p>
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