Php 在多维数组中计算一列中的频率…并与另一列一起工作

我有一个像这样的csv文件，当然还有更多的行。它有4列

433444 20 2009 Part_description_433444
432222 15 2009 Part_description_432222
535333 10 2010 Part_description_535333
433444 15 2009 Part_description_433444
432222 .4 2012 Part_description_432222
535333 20 2010 Part_description_535333

我想计算第一列中零件号出现的次数。第二列表示该行中每个关联零件号的数量。所以我想计算第一列中零件号出现的次数…然后用第二列乘以每次出现的数量。此外，我想按每年的次数/数量进行排序，这是第3列

到目前为止，我只有多维数组格式

$formattedArr = array();
$filename = "parts_compile.csv";

if (($handle = fopen($filename, "r")) !== FALSE) {
    $key = 0;    // Set the array key.
    while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
        $count = count($data);  //get the total keys in row
        //insert data to our array
        for ($i=0; $i < $count; $i++) {
            $formattedArr[$key][$i] = $data[$i];
        }
        $key++;
    }
    fclose($handle);    //close file handle
}
//csv to multidimensional array in php
echo $formattedArr[2][0];

$formattedArr=array（）；
$filename=“parts\u compile.csv”；
if（$handle=fopen（$filename，“r”）！==FALSE）{
$key=0；//设置数组键。
while（（$data=fgetcsv（$handle，1000，“，”）！==FALSE）{
$count=count（$data）；//获取行中的键总数
//将数据插入我们的数组
对于（$i=0；$i<$count；$i++）{
$formattedArr[$key][$i]=$data[$i]；
}
$key++；
}
fclose（$handle）；//关闭文件句柄
}
//php中csv到多维数组的转换
echo$formattedArr[2][0]；

我想我应该在第一列中找到每个元素的匹配数，在第二列中保留对数量的引用，但我不知道该怎么做。非常感谢您的帮助

谢谢，

---

另一种可能的解决方案：

<?php

$formattedArr = array();
$filename = "parts_compile.csv";

if (($handle = fopen($filename, "r")) !== FALSE) {
    while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
        //insert data to our array
        $formattedArr[] = $data;
    }
    fclose($handle);    //close file handle
}

echo "<pre>";
print_r($formattedArr);
echo "</pre>";

$idx_id = 0;
$idx_amount = 1;
$idx_year = 2;
$idx_name = 3;

$res = array();

foreach($formattedArr as $a) {
    $id = $a[$idx_id];
    $amount = $a[$idx_amount];
    $year = $a[$idx_year];
    $name = $a[$idx_name];
    if(!isset($res[$id])) {
        $res[$id] = array('name'=>$name, 'quant_per_year'=>array());
    }
    if(!isset($res[$id]['quant_per_year'][$year])) {
        $res[$id]['quant_per_year'][$year] = 0;
    }
    $res[$id]['quant_per_year'][$year] += $amount;
}

echo "<pre>";
print_r($res);
echo "</pre>";

---

我不知道你要怎么分类

此外，我想按每年的次数/数量进行排序，这是第3列

有点模糊

---

哦，这就是他的意思吗？当一个给定的零件可能在多行上有多个年份时，我对如何按年份排序感到困惑。现在我明白了…我希望这就是他的意思，我真的不知道。我会这样做，并通过javascript处理排序和总和。

<?php

$formattedArr = array();
$filename = "parts_compile.csv";

if (($handle = fopen($filename, "r")) !== FALSE) {
    while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
        //insert data to our array
        $formattedArr[] = $data;
    }
    fclose($handle);    //close file handle
}

echo "<pre>";
print_r($formattedArr);
echo "</pre>";

$idx_id = 0;
$idx_amount = 1;
$idx_year = 2;
$idx_name = 3;

$res = array();

foreach($formattedArr as $a) {
    $id = $a[$idx_id];
    $amount = $a[$idx_amount];
    $year = $a[$idx_year];
    $name = $a[$idx_name];
    if(!isset($res[$id])) {
        $res[$id] = array('name'=>$name, 'quant_per_year'=>array());
    }
    if(!isset($res[$id]['quant_per_year'][$year])) {
        $res[$id]['quant_per_year'][$year] = 0;
    }
    $res[$id]['quant_per_year'][$year] += $amount;
}

echo "<pre>";
print_r($res);
echo "</pre>";

Array
(
    [433444] => Array
        (
            [name] => Part_description_433444
            [quant_per_year] => Array
                (
                    [2009] => 35
                )

        )

    [432222] => Array
        (
            [name] => Part_description_432222
            [quant_per_year] => Array
                (
                    [2009] => 15
                    [2012] => 0.4
                )

        )

    [535333] => Array
        (
            [name] => Part_description_535333
            [quant_per_year] => Array
                (
                    [2010] => 30
                )

        )

)

<?php 

$filename = "parts_compile.csv";

$parts = array();

if (($handle = fopen($filename, "r")) !== FALSE) {
    // the data is dilimited with 1 white space character in the question
    while (($columns = fgetcsv($handle, 0, " ")) !== FALSE) {

        $prod_number = $columns[0];
        $quantity    = $columns[1];
        $year        = $columns[2];

        if (!isset($parts[$prod_number])) {
            $parts[$prod_number] = array('name' => $columns[3], 'occurances' => 0, 'quantity' => 0, 'years' => array());
        }

        $parts[$prod_number]['occurances']++;
        $parts[$prod_number]['quantity'] += $quantity;

        if (!isset($parts[$prod_number]['years'][$year])) {
            $parts[$prod_number]['years'][$year] = 0;
        }

        $parts[$prod_number]['years'][$year] += $quantity;
    }

    fclose($handle);

    foreach ($parts as &$part) {
        arsort($part['years']);
    }
    echo '<pre>';
    print_r($parts);
}  

<pre>
Array
(
    [433444] => Array
        (
            [name] => Part_description_433444
            [occurances] => 2
            [quantity] => 35
            [years] => Array
                (
                    [2009] => 35
                )
        )
    [432222] => Array
        (
            [name] => Part_description_432222
            [occurances] => 2
            [quantity] => 15.4
            [years] => Array
                (
                    [2009] => 15
                    [2012] => 0.4
                )
        )
    [535333] => Array
        (
            [name] => Part_description_535333
            [occurances] => 2
            [quantity] => 30
            [years] => Array
                (
                    [2010] => 30
                )
        )
)