显示数据库中blob类型的图片,我图片显示不出来

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showimage.php
<?php  
include_once dirname(dirname (dirname ( __FILE__ ))). '/yeqztsys1.0/utilityfunction/SqlHelp.class.php';
include_once dirname(dirname (dirname ( __FILE__ ))). '/yeqztsys1.0/Comm.class.php';

$SqlHelper = new SqlHelp ( 'read', 'qztoa' );
$sql = "select * from qzt_image";
$query = $SqlHelper->query($sql );
$query_num = $SqlHelper->num_rows ($query );

$rows = array ();
$retarr = array ();
$query =$SqlHelper->query ( $sql );
if($query)
{
$arr_teainfo2 = array ();
while ( $arr_teainfo = $SqlHelper->fetch_assoc($query) ) {
$arr_teainfo2 [] = $arr_teainfo;
$Id=$arr_teainfo["Id"];
echo $arr_teainfo["Id"];
echo "<IMG SRC=\"Second.php3?Id=$Id\">";

}
}



?>


Second.php3
<?php  
include_once dirname(dirname (dirname ( __FILE__ ))). '/yeqztsys1.0/utilityfunction/SqlHelp.class.php';
include_once dirname(dirname (dirname ( __FILE__ ))). '/yeqztsys1.0/Comm.class.php';

$SqlHelper = new SqlHelp ( 'read', 'qztoa' );
$sql = "select * from qzt_image where Id=10";
$query = $SqlHelper->query($sql );
$query_num = $SqlHelper->num_rows ($query );

$rows = array ();
$retarr = array ();
$query =$SqlHelper->query ( $sql );
if($query)
{
$arr_teainfo2 = array ();
while ( $arr_teainfo = $SqlHelper->fetch_assoc($query) ) {
$arr_teainfo2 [] = $arr_teainfo;
$Id=$arr_teainfo["Id"];
$imagetype=$arr_teainfo["imagetype"];
//echo $arr_teainfo["images"];
//Header( "Content-type: $imagetype");
header('Content-type: $imagetype');
echo $arr_teainfo["images"];

}
}

?>


请问我哪里有问题?PHP新人,不知道哪里错了
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