image crop with gd then upload to db but not resizing - php

Question

My code basically should crop the image to 219px by 127px and save the image to the database but I'm getting errors and can't figure it out.
<?php
if(isset($_POST['btnupload']) && $_FILES['imglogo']['size'] > 0) {
$tmpname = $_FILES['imglogo']['tmp_name'];
$imgsize = $security->secure($_FILES['imglogo']['size']);
$imgtype = $security->secure($_FILES['imglogo']['type']);
$school = $security->secure($_POST['school']);
//crop image
$canvas = imagecreatetruecolor(219,127);
$imgattrib = getimagesize($tmpname);
$source = imagecreatefromjpeg($tmpname);
imagecopyresized($canvas,$source,0,0,0,0,219,127,$imgattrib[0],$imgattrib[1]);
$handle = fopen($tmpname, "r");
$content = fread($handle, filesize($tmpname));
$content = addslashes($content);
fclose($handle);
$save = mysql_query("insert into tbl_school_preview values(null,'$school','$content','$imgtype','$imgsize')") or die(mysql_error());
//header("Location: school-catalog.php?page=school_preview");
}
?>
I don't see any errors but the crop isn't happening. Do I have something wrong?
[Updated code]
Here is the new piece of block for some reason the thumb won't save.
if(isset($_POST['btnupload']) && $_FILES['imglogo']['size'] > 0) {
//$filename = $security->secure($_FILES['imgschool']['name']);
$tmpname = $_FILES['imglogo']['tmp_name'];
$imgsize = $security->secure($_FILES['imglogo']['size']);
$imgtype = $security->secure($_FILES['imglogo']['type']);
$school = $security->secure($_POST['school']);
//crop image
$canvas = imagecreatetruecolor(219,127);
$imgattrib = getimagesize($tmpname);
$source = imagecreatefromjpeg($tmpname);
imagecopyresized($canvas,$source,0,0,0,0,219,127,$imgattrib[0],$imgattrib[1]);
$newfile = imagejpeg($canvas,'thumb.jpg',100);
$handle = fopen($newtmpfile, "r");
$content = fread($newtmpfile, filesize($newtmpfile));
$content = addslashes($content);
fclose($handle);
$save = mysql_query("insert into tbl_school_preview values(null,'$school','$content','$imgtype','$imgsize')") or die(mysql_error());

Answer 1

You don't need to do any fopen / fwrite stuff to save your image. Replace all that with something like:
$filename = '/path/to/desired/save/location.png'
imagepng($canvas, $filename);
And you should be good to go. The imagepng function will write the file when you give it the second parameter. Same would be true for imagegif and imagejpeg.

Answer 2

You should save the content of $canvas, not the content of the original image.
Output it to temporary file with imagepng, or directly output stream, which you will then have to intercept.
ob_start();
imagepng($canvas);
$out = ob_get_contents();
ob_end_clean();

Answer 3

Just two tips:
I would first of all not to save the file to the filesystem.. You can use ob_start() to get the content of the file.
ob_start();
imagepng($canvas);
$imageString = ob_get_contents();
ob_end_clean();
$save = mysql_query("
insert into tbl_school_preview
values(null,'$school',$imagestring,'$imgtype','$imgsize')
")or die(mysql_error());
Also use imagecopyresampled() for better quality of the thumbnail. Beware of strange characters in the image code when inserting into the database.