我正在编写一个 php 脚本来从 MYSQL 数据库中提取一些数据，然后我想获取这些数据并将其存储到一个二维数组中。正常考虑，如果我使用这样的代码
$test = array();
$test[0]=array();
$test[0]['hello']='hello';
$test[1]=array();
$test[1]['hello']='hello';
$test[2]=array();
$test[2]['hello']='hello';
print_r($test);
输出将是：
Array ( [0] => Array ( [hello] => hello ) [1] => Array ( [hello] => hello ) [2] =>
Array ( [hello] => hello ) )
这就是我希望我的输出的方式
所以这就是我在脚本中所做的
所以基本上在我的数据库中，我有一个女子联赛排名表，列是
team_name, played, won, drawn, lost, for, against, points
所有连接都已成功处理，以下是我的查询
$get_ladies_query = "SELECT
`team_name`, `played`, `won`, `drawn`, `lost`, `for`, `against`, `points`
FROM `standings_ladies` order by pos";
在我展示下一个代码之前，重要的一点是，还有 2 个其他排名表 men_senior 和 men_intermediate 具有相同的结构，但显然只有数据发生变化，下面是两个查询，以防万一
$get_mens_inter_query = "SELECT
`team_name`, `played`, `won`, `drawn`, `lost`, `for`, `against`, `points`
FROM `standings_men_inter` order by pos";
$get_mens_senior_query = "SELECT
`team_name`, `played`, `won`, `drawn`, `lost`, `for`, `against`, `points`
FROM `standings_men_senior` order by pos";
现在我创建了 3 个数组，我想分别为女士、男士高级、男士中级保持排名
$standings_ladies = array();
$standings_men_inter = array();
$standings_men_senior = array();
我想在数组中显示的数据是这样的
array(0=>array(team_name,wins,drawn,lost,for,against,points)
1=>array(team_name,wins,drawn,lost,for,against,points)) and so on
现在，由于我想为所有 3 个类别创建排名的多维数组，我可以在 3 个单独的 while 循环中运行查询，尽管我认为，我可以在 1 中完成相同的结果，并且我认为这将有助于提高性能。如果使用 3 个 while 循环更好，请告诉我，我尝试过的内容如下。
//I run the 3 queries and store them in the given variables
$result_mens_senior = mysqli_query($link,$get_mens_senior_query);
$result_mens_inter = mysqli_query($link,$get_mens_inter_query);
$result_ladies= mysqli_query($link, $get_ladies_query);
//I want to create 1 while loop so based of the results returned from the 3
//queries so based on the results returned from the 3 queries,
//I get the max number of times I want the query to run
$ladies_boundary = mysqli_num_rows($result_ladies);
$mens_senior_boundary = mysqli_num_rows($result_mens_senior);
$mens_inter_boundary = mysqli_num_rows($result_mens_inter);
$max_size = max(array($ladies_boundary,$mens_senior_boundary,$mens_inter_boundary));
//set an index to start from 0
$index = 0;
//I will only show the example for 1 of the arrays but you get an idea
that this issue will occur for all
while ($index < $max_size)
{
//first, everytime the loop is entered, we need the next row to be fetched
$standings_men_inter_table = mysqli_fetch_assoc($result_mens_inter);
$standings_ladies_table = mysqli_fetch_assoc($result_ladies);
//there is a high chance that the other two tables return a different row size
//so its best to check that we do not go beyond
if($index < $mens_senior_boundary)
{
//we fetch the rows every time we enter the block
$standings_men_senior_table = mysqli_fetch_assoc($result_mens_senior);
//then, this is how I attempt at creating the 2 dimensional array
array_push($standings_men_senior, array(
$standings_men_senior_table['team_name'],
$standings_men_senior_table['played'],
$standings_men_senior_table['won'],
$standings_men_senior_table['drawn'],
$standings_men_senior_table['lost'],
$standings_men_senior_table['for'],
$standings_men_senior_table['against'],
$standings_men_senior_table['points']));
}
//incrementing index each time the loop runs
$index++;
}
最后，我只想打印我认为是数组的东西，但得到这个，附上图片，希望你能看清楚
只是为了进一步调查，每次输入“if”块时，我都将所有内容都注释掉，然后将其放入以查看返回的内容
if($index < $mens_senior_boundary)
{
print_r(mysqli_fetch_assoc($result_mens_senior));
}
我得到的输出几乎是我需要的 90%
Array
([team_name] => Morley Gaels [played] => 8 [won] => 6 [drawn] => 2
[lost] => 0 [for] => 110 [against] => 83 [points] => 14 )
Array ( [team_name] => Southern Districts [played] => 8 [won] => 3 [drawn] => 2
[lost] => 3 [for] => 104 [against] => 98 [points] => 8 )
Array ( [team_name] => St Finbarrs [played] => 8 [won] => 3 [drawn] => 2
[lost] => 3 [for] => 107 [against] => 99 [points] => 8 )
Array ( [team_name] => Western Shamrocks [played] => 8 [won] => 3 [drawn] => 0
[lost] => 5 [for] => 96 [against] => 88 [points] => 6 )
Array ( [team_name] => Greenwood [played] => 8 [won] => 1 [drawn] => 1
[lost] => 9 [for] => 82 [against] => 109 [points] => 3 )
我需要的是例如：
Array(0=>Array
([team_name] => Morley Gaels [played] => 8 [won] => 6 [drawn] => 2
[lost] => 0 [for] => 110 [against] => 83 [points] => 14 )
1=>Array
([team_name] => Southern Districts [played] => 8 [won] => 3 [drawn] => 2
[lost] => 3 [for] => 104 [against] => 98 [points] => 8 )..... so on);
我的问题是
- 我的代码有什么问题，在 php 中动态创建多维数组的正确方法是什么？
- 关于 mysql_fetch_assoc 的工作原理和返回方式，我有什么不明白的吗？
- 有什么需要改进的地方，我做错了什么吗？
感谢您的时间，而不是您阅读它，我试图尽可能详细地了解我的尝试。
谢谢你。