在多维数组上使用循环内循环来对数据进行分组

Question

我试图从多维数组输出分组数据。考虑最高级数组键'group'，然后在组中是单独的搜索行。

。$group[ 0 ][ 1 ]将是'组1，行1'。

我想显示每个组的所有行，然后通过插入' <hr /> '标记表示该组已更改。目前第一组显示正确，然后显示hr标记，但第二组结果没有显示。我的循环中的循环方法是错误的吗?有可能像这样使用多维数组吗?谢谢! !

我的数组是这样的:

Array
(
[0] => Array
    (
        [0] => stdClass Object
            (
                [name] => testing
                [searchID] => 131
                [lineID] => 190
                [searchString] => 1
            )
        [1] => stdClass Object
            (
                [name] => testing
                [searchID] => 131
                [lineID] => 191
                [searchString] => 2
            )
        [2] => stdClass Object
            (
                [name] => testing
                [searchID] => 131
                [lineID] => 192
                [searchString] => 3
            )
        [3] => stdClass Object
            (
                [name] => testing
                [searchID] => 131
                [lineID] => 193
                [searchString] => 4
            )
    )
[1] => Array
    (
        [4] => stdClass Object
            (
                [name] => test2
                [searchID] => 132
                [lineID] => 199
                [searchString] => 1
            )
        [5] => stdClass Object
            (
                [name] => test2
                [searchID] => 132
                [lineID] => 200
                [searchString] => 2
            )
    )
)

我的代码是这样的:

 $x = 0;
 $y = 0;
 while( $x < count( $groups ) )
 {
 while( $y < count( $groups[ $x ] ) )
 {
     //display each single search string
    echo $groups[ $x ][ $y ]->searchString.'<br>';
    $y++; 
 }
 echo '<hr>';
 $x++;
 }

Answer 1

你可以试试

foreach ( $groups as $group ) {
    foreach ( $group as $var ) {
        echo $var->searchString, "<br />";
    }
}

Answer 2

看一下你的示例数组，第二组的y值应该从4开始循环，直到它达到6。

我建议你使用foreach循环。http://php.net/manual/en/control-structures.foreach.php

你的代码看起来像这样:

foreach ( $groups as $gKey => $gValue )
{
    foreach ( $gValue as $key => $value )
    {
        echo $groups[$gKey][$key]->searchString . "<br />";
        // or $value->searchString . "<br />";
    }
    echo "<hr />";
}

Answer 3

您需要在第一个循环内重置y。

$x = 0;
while( $x < count( $groups ) )
{
    $y = 0;
    while( $y < count( $groups[ $x ] ) )
    {
        //display each single search string
        echo $groups[ $x ][ $y ]->searchString.'<br>';
        $y++; 
    }
     echo '<hr>';
     $x++;
}

Answer 4

Try foreach:

foreach ($groups as $x => $group )
{
    foreach ($group as $y => $subGroup )
    {
        echo $subGroup->searchString . '<br>';
    }
    echo '<hr>';
}