同一个编辑器EclipsePHP Studio v1.2.2编纂的两个页面，print_r输出为何字体大小格式不一致？ 用ajax.php正常，用osg_aja

同一个编辑器EclipsePHP Studio v1.2.2编写的两个页面，print_r输出为何字体大小格式不一致？ 用ajax.php正常，用osg_aja
同一个编辑器EclipsePHP Studio v1.2.2编写的两个页面，print_r输出为何字体大小格式不一致？结果导致三级省市联动用ajax.php正常，用osg_ajax.php不正常
ajax.php中代码如下：
header("Content-Type:text/html;charset=gbk");
$sql = "SELECT * FROM `ecs_region` WHERE `parent_id` = '1' ORDER BY `region_id` ASC ";
$list = $db->getAll($sql);
foreach ($list as $key => $val ) {
$list[$key]['region_name'] = urlencode (iconv ('gbk','utf-8',$val['region_name']));
}
print_r (json_encode ($list));

输出结果如下：
———————————————————————————————————————————————————————

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osg_ajax.php
代码如下：
$sql = "SELECT * FROM `osg_region` WHERE `parent_id` = '1' ORDER BY `region_id` ASC ";

$cursor = exequery( $connection, $sql);

while($rows=mysql_fetch_assoc( $cursor )){
$arr[]=$rows;
}

foreach ($arr as $key => $val )
{
$arr[$key]['region_name'] = urlencode (iconv ('gbk','utf-8',$val['region_name'])); //

}

print_r (json_encode ($arr));

——————————————————————————————————————————————————
输出结果如下：


------解决方案--------------------
编码问题？ BOM头？