checkbox

$t_t=explode(",",$db_row[strTarget]);
foreach($t_t as $key=>$value)
{
${'ch_k_v_'.$value}="checked";
}

foreach($Ins_News_db_lib->school_arr as $key=>$value)
{

$c_val=${'ch_k_v_'.$key};

echo"<input type=checkbox name=strTarget_$key value='$key' $c_val >$value &nbsp;";

}

=============================================

foreach($Ins_News_db_lib->school_arr as $key=>$value)
{

if(${'strTarget_'.$key})
{
$strTarget .=$key.",";
}

}