删除重复项并显示最大计数

Question

我有下面的代码，但我的问题是我收到了 PHP 通知：未定义的偏移量：（从 1 到 7） error message 对我来说非常重要的是只获得最大数量的国家 ID 一次。它计算项目的数量并每次增加一个正确的和我需要的项目，但只需要显示一次 how does it display 正确的结果显示类似于： the correct result

这是我的代码：-

<table>
    <tr>
        <th>Country ID</th>
        <th>Country Name</th>
        <th>Number of Place</th>
    </tr>

    <?php 
    $country_counts=[];
    $count_country =0;
    $country_count_each=0;
    $ids=array();// Store unique country_id values here
   
    foreach( $projects as $project ) {
        $country_id = $project['Project']['country_id'];
        # Check if the country_id is NOT in the array and display if OK.
        if( isset( $country_counts[ $country_id ] ) || !in_array( $country_id, $ids ) ) {
            $country_counts[$country_id]++;
            $country_count_each = $project['Project']['country_id'];
                if($project['Project']['country_id']==$country_count_each){
                    $count_country+=$country_count_each;
                    $ids[]=$country_id;
                    //echo $country_counts[$country_id];
    ?>
        <tr>
            <td style="width: 30%"><?php echo $project['Project']['country_id']; ?></td>
            <td style="width: 30%"><?php echo 'Country Name'; ?></td>
            <td style="width: 30%"><?php echo $country_counts[$project['Project']['country_id']]; ?></td>
        </tr>
    <?php       
                } 
        }else {
            $country_counts[$country_id] =$country_id;
        }
    }
    $proects_num = count($projects); 

    ?>

</table>

<?php 
    echo '<br>' .'Total projects numbers are: ' . $proects_num .'<br>'; 
    echo $html->link('Home ', $this->webroot.'countries/index/');
?>

数据库中的table Table of projects

我需要帮助

Answer 1

你的问题在于你试图在同一个循环中循环、计数和回显 table...你不能:)

您需要在输出前准备好数据

您需要事先知道每个国家/地区代码出现的次数（在开始 table 输出循环之前....）。

添加另一个循环来准备数据是一个简单的选择。

我创建了一个代码来解释你的代码（在开始时创建了一些数据）： 在这个例子中我又添加了一个循环...现在我们有两个。

    <?php 

    $projects['Project'][0]['id'] = 1;
    $projects['Project'][0]['project_name'] = "musem something";
    $projects['Project'][0]['project_price'] = 10;
    $projects['Project'][0]['project_deduction'] = 30;
    $projects['Project'][0]['country_id'] = 1;

    $projects['Project'][1]['id'] = 2;
    $projects['Project'][1]['project_name'] = "musem nid";
    $projects['Project'][1]['project_price'] = 5;
    $projects['Project'][1]['project_deduction'] = 25;
    $projects['Project'][1]['country_id'] = 1;

    $projects['Project'][2]['id'] = 3;
    $projects['Project'][2]['project_name'] = "khalefa tower";
    $projects['Project'][2]['project_price'] = 20;
    $projects['Project'][2]['project_deduction'] = 50;
    $projects['Project'][2]['country_id'] = 2;

    $projects['Project'][3]['id'] = 4;
    $projects['Project'][3]['project_name'] = "gold market";
    $projects['Project'][3]['project_price'] = 15;
    $projects['Project'][3]['project_deduction'] = 40;
    $projects['Project'][3]['country_id'] = 2;

    /*Country names*/
    $cNames[1] = "Holland"; 
    $cNames[2] = "Dubai";

    echo '<pre>';
    print_r($projects); /* print the array */

    $country_counts=[];
    $count_country =0;
    $country_count_each=0;
    $ids=array();// Store unique country_id values here
?><table>
<tr>
    <th>Country ID</th>
    <th>Country Name</th>
    <th>Number of Place</th>
</tr><?php
    /* Loop to create table data */
    foreach( $projects['Project'] as $p ) {
        /* create new table data array with the country code as its key */
        if(!isset($tableArray[$p['country_id']])){
            $tableArray[$p['country_id']]['count'] = 1;
        } else {
            ++$tableArray[$p['country_id']]['count'];
        }
    }
    print_r($tableArray); /* print table data */
    /* Loop to create table */
    foreach($tableArray as $k => $line){
        ?>
        <tr>
            <td style="width: 30%"><?php echo $k; ?></td>
            <td style="width: 30%"><?php echo $cNames[$k] ?></td>
            <td style="width: 30%"><?php echo $line['count']; ?></td>
        </tr>
    <?php       
    }

    ?>

</table>

<?php 
    $proects_num = count($projects['Project']); 
    echo '<br>' .'Total projects numbers are: ' . $proects_num .'<br>'; 
    echo '<br>' .'Total countries are: ' . count($tableArray) .'<br>'; 
    echo $html->link('Home ', $this->webroot.'countries/index/');
?>

将输出：

Array
(
    [Project] => Array
        (
            [0] => Array
                (
                    [id] => 1
                    [project_name] => musem something
                    [project_price] => 10
                    [project_deduction] => 30
                    [country_id] => 1
                )

            [1] => Array
                (
                    [id] => 2
                    [project_name] => musem nid
                    [project_price] => 5
                    [project_deduction] => 25
                    [country_id] => 1
                )

            [2] => Array
                (
                    [id] => 3
                    [project_name] => khalefa tower
                    [project_price] => 20
                    [project_deduction] => 50
                    [country_id] => 2
                )

            [3] => Array
                (
                    [id] => 4
                    [project_name] => gold market
                    [project_price] => 15
                    [project_deduction] => 40
                    [country_id] => 2
                )

        )

)
Array
(
    [1] => Array
        (
            [count] => 2
        )

    [2] => Array
        (
            [count] => 2
        )

)
        
Country ID  Country Name    Number of Place
1           Holland         2
2           Dubai           2



Total projects numbers are: 4

Total countries are: 2

删除重复项并显示最大计数

Remove duplication and show max count

php

cakephp-1.2