使用 php 在多维数组中删除和插入重复元素的计数

Question

我有一套借书的多维数组

数组 ( [0] => 数组 ( [出价] => 1 [开始日期] => 2015-02-03 [标题] => 编程 )

[1] => Array
    (
        [bid] => 1
        [begindate] => 2015-02-03
        [title] => programming
    )

[2] => Array
    (
        [bid] => 1
        [begindate] => 2015-02-03
        [title] => programming
    )

[3] => Array
    (
        [bid] => 4
        [begindate] => 2015-02-03
        [title] => english
    )

[4] => Array
    (
        [bid] => 4
        [begindate] => 2015-02-04
        [title] => english
    )

[5] => Array
    (
        [bid] => 4
        [begindate] => 2015-02-04
        [title] => english
    )

)

我已经有了删除重复项的代码

0: begindate: "2015-02-03", bid: "1",title: "programming"    
3: begindate: "2015-02-03", bid: "4", title: "english"    
4: begindate: "2015-02-04"bid: "4"title: "english"

我想要的是在该数组中插入重复项的计数，这样我就可以得到这样的结果...

0: begindate: "2015-02-03", bid: "1",title: "programming", count:"3"    
3: begindate: "2015-02-03", bid: "4", title: "english", count:"1"    
4: begindate: "2015-02-04", bid: "4", title: "english", count:"2"

Answer 1

它不是很漂亮，但它会做你想做的事：

//main array here is $books
$clean = array();
foreach($books as $k1=>$v1){
    $exists = false;
    //does an entry already exist in $clean?
    foreach($clean as $k2=>$v2){
        if($v1["begindate"]==$v2["begindate"]&&$v1["bid"]==$v2["bid"]&&$v1["title"]==$v2["title"]){
            $exists = $k2;
            break;
        }
    }
    if($exists===false){
        //begin count, insert
        $v1["count"] = 1;
        array_push($clean,$v1);
    }else{
        //increment count
        $clean[$exists]["count"]++;
    }
}
print_r($clean);

使用 php 在多维数组中删除和插入重复元素的计数

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