php多维数组去掉重复值示例分享

<?php
$json='{

"rec_items": [
{
"classes": "玄幻",
"gid": 6326585,
"author": "我吃西红柿",
"nid": 10079306,
"last_sort": 841,
"last_chapter_name": "第二十五卷 第六章 一扫而空",
"sub_count": 5364424,
"novel_name": "莽荒纪",
"last_update_time": 1393679718826
},
{
"classes": "玄幻",
"gid": 6109786,
"author": "唐家三少",
"nid": 10079046,
"last_sort": 1153,
"last_chapter_name": "第三百八十一章 开始行动（中）",
"sub_count": 3933876,
"novel_name": "绝世唐门",
"last_update_time": 1393681654511
},
{
"classes": "玄幻",
"gid": 10645516,
"author": "辰东",
"nid": 12649548,
"last_sort": 478,
"last_chapter_name": "第四百三十二章 扛媳妇回村",
"sub_count": 1422482,
"novel_name": "完美世界",
"last_update_time": 1393681655610
},
{
"classes": "玄幻",
"gid": 4711723,
"author": "只是小虾米",
"nid": 12629406,
"last_sort": 2603,
"last_chapter_name": "第2588章 苏醒！",
"sub_count": 2841630,
"novel_name": "武逆",
"last_update_time": 1393605899300
},
{
"classes": "玄幻",
"gid": 3701669,
"author": "苍笑天",
"nid": 8583556,
"last_sort": 3427,
"last_chapter_name": "第两千两百二十五章 孔雀王！",
"sub_count": 606473,
"novel_name": "武破九霄",
"last_update_time": 1391279170831
},
{
"classes": "玄幻",
"gid": 8141499,
"author": "风凌天下",
"nid": 9212380,
"last_sort": 2579,
"last_chapter_name": "第五百二十六章 九劫、天帝之战【七】",
"sub_count": 3082857,
"novel_name": "傲世九重天",
"last_update_time": 1393677692614
}
],
"cate_book_items": [
{
"classes": "玄幻",
"gid": 4711723,
"author": "只是小虾米",
"nid": 12629406,
"last_sort": 2603,
"last_chapter_name": "第2588章 苏醒！",
"sub_count": 2841630,
"novel_name": "武逆",
"last_update_time": 1393605899300
},
{
"classes": "玄幻",
"gid": 3701669,
"author": "苍笑天",
"nid": 8583556,
"last_sort": 3427,
"last_chapter_name": "第两千两百二十五章 孔雀王！",
"sub_count": 606473,
"novel_name": "武破九霄",
"last_update_time": 1391279170831
},
{
"classes": "玄幻",
"gid": 10645516,
"author": "辰东",
"nid": 12649548,
"last_sort": 478,
"last_chapter_name": "第四百三十二章 扛媳妇回村",
"sub_count": 1422482,
"novel_name": "完美世界",
"last_update_time": 1393681655610
}
]
}';

function mult_unique($array)
{
$return = array();
foreach($array as $key=>$v)
{
if(!in_array($v, $return))
{
$return[$key]=$v;
}
}
return $return;
}

$json = get_object_vars(json_decode($json));
$data = $json['rec_items'];
$data = array_merge_recursive($data, $json['cate_book_items']);

echo '<pre>';
print_r($data);
echo '<br>';
print_r(mult_unique($data));
echo '</pre>';
?>