例 PHP中有这么一个多维数组
Array[4][
{
"attr_id": "11",
"attr_price": "29.8",
"attr_value": "蓝色",
"goods_attr_id": "31",
"goods_id": "10"
},{
"attr_id": "8",
"attr_price": "29.8",
"attr_value": "60CM",
"goods_attr_id": "29",
"goods_id": "10"
},{
"attr_id": "8",
"attr_price": "29.8",
"attr_value": "70CM",
"goods_attr_id": "30",
"goods_id": "10"
},{
"attr_id": "11",
"attr_price": "29.8",
"attr_value": "黑色",
"goods_attr_id": "28",
"goods_id": "10"
}
]
求教要怎么想相同的 “attr_id” 提取到一个新的数组中 如：
$arr = new arrry();
$arr["a"] = [
{
"attr_id": "8",
"attr_price": "29.8",
"attr_value": "70CM",
"goods_attr_id": "30",
"goods_id": "10"
},{
"attr_id": "8",
"attr_price": "29.8",
"attr_value": "70CM",
"goods_attr_id": "30",
"goods_id": "10"
},
]
$arr["b"] = [
{
"attr_id": "11",
"attr_price": "29.8",
"attr_value": "蓝色",
"goods_attr_id": "31",
"goods_id": "10"
},{
"attr_id": "11",
"attr_price": "29.8",
"attr_value": "黑色",
"goods_attr_id": "28",
"goods_id": "10"
}
]
数组长度不确定、attr_id值、数量不确定，就是要判断将数组中的attr_id相同的归类放入新的数组中.
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