如何使用 php 的循环和数组

Question

我是编程新手php，我有这样的数据库输出查询数据

name    activity  payment
english  activ A   20
english  activ B   25
english  activ c   30
biology  activ d   50
biology  activ e   60

但我想这样显示输出：

name    activity  payment
english  activ A   20
         activ B   25
         activ c   30
biology  activ d   50
         activ e   60

逻辑程序如何使用PHP同名只显示一个名字？

你能解决这个问题吗？

Answer 1

数据库将显示与

相同的名称

name    activity  payment
english  activ A   20
english  activ B   25
english  activ c   30
biology  activ d   50
biology  activ e   60

但是如果你想将记录显示为

name    activity  payment
english  activ A   20
         activ B   25
         activ c   30
biology  activ d   50
         activ e   60

您可以在 php

中执行此操作

例如

$datas = $fetched_data; // $fetched_data store all data which is selected          from database
// now in php use foreach loop
$previous_colm = "";
foreach($datas as $data){
    if($previous_colm == $data['name']){
          // echo without printing column name again
          echo $data['activity']." ".$data['payment'];
    }else{
         // echo with new column name
         echo echo $data['name']." ".$data['activity']." ".$data['payment'];
    }
    $previous_colm = $data['name'];
}

现在这将输出与您想要的相同...!!!

Answer 2

$arr = array(
    array('name' => 'english', 'activity' => 'activ A', 'payment' => 20),
    array('name' => 'english', 'activity' => 'activ B', 'payment' => 25),
    array('name' => 'english', 'activity' => 'activ c', 'payment' => 30),
    array('name' => 'biology', 'activity' => 'activ d', 'payment' => 50),
    array('name' => 'biology', 'activity' => 'activ e', 'payment' => 60),
);

$different_names = get_different_names($arr);
echo "Name Activity Payment";
display($different_names, $arr);



function display($different_names, $arr) {
    foreach($different_names as $name) {
        foreach($arr as $row) {
            if($row['name'] == $name)
                echo "</br> {$row['name']}  {$row['activity']} {$row['payment']} ";
        }
    }
}

function get_different_names($arr) {
    $different_names = array();
    foreach($arr as $row) {
        if(!in_array($row['name'], $different_names))
            $different_names[] = $row['name'];
    }
    return $different_names;
}

p.s。 Zebi Rajpot 的解决方案很好。但我认为如果结果未按 name.

排序，它不会产生所需的输出

如何使用 php 的循环和数组

how to use looping and array with php

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