Question

如果我有以下数组：

$Unmanaged =    array(
                array('name' => 'SD2005', 'speed' => '1000', 'size' => 'desk', 'uplink' => 'no'),
                array('name' => 'SD2008', 'speed' => '1000', 'size' => 'desk', 'uplink' => 'no'),
                array('name' => 'SR2016', 'speed' => '1000', 'size' => 'rack', 'uplink' => 'no'),
                array('name' => 'SR2024', 'speed' => '1000', 'size' => 'rack', 'uplink' => 'no'),
                array('name' => 'SR2024C', 'speed' => '1000', 'size' => 'rack', 'uplink' => 'no'),
                array('name' => 'SD205', 'speed' => '100', 'size' => 'desk', 'uplink' => 'no'),
                array('name' => 'SD208', 'speed' => '100', 'size' => 'desk', 'uplink' => 'no'),
                array('name' => 'SD216', 'speed' => '100', 'size' => 'desk', 'uplink' => 'no'),
                array('name' => 'SR224G', 'speed' => '100', 'size' => 'rack', 'uplink' => 'yes'),
                array('name' => 'SR216', 'speed' => '100', 'size' => 'rack', 'uplink' => 'no'),
                array('name' => 'SR224', 'speed' => '100', 'size' => 'rack', 'uplink' => 'no'),
                array('name' => 'SR224R', 'speed' => '100', 'size' => 'rack', 'uplink' => 'no')
                );

如何循环遍历所有条目，返回满足特定条件的所有条目，例如：速度为100的所有交换机：100，大小：桌面和上行链路：否？

请帮忙。

谢谢，本

Answer 1

以下是使用array_filter()：

执行此操作的方法

function my_callback($elem) {
    return $elem['speed']==100 && $elem['size']=='desk' && $elem['uplink']=='no';
}

$results = array_filter($Unmanaged, 'my_callback');

使用PHP 5.3的匿名函数，您可以在运行时使所选值动态化：

function create_callback($speed, $size, $uplink) {
    return function ($elem) use ($speed, $size, $uplink) { 
        return $elem['speed']==$speed && $elem['size']==$size && $elem['uplink']==$uplink;
    };
}

$results = array_filter($unmanaged, create_callback(100, 'desk', 'no'));

编辑：正如您刚评论的那样，您只需要切换名称即可。没问题;使用上述任一解决方案后，您可以添加：

function get_name($elem) { return $elem['name']; }
$names = array_map('get_name', $results);

Answer 2

如下所示？使用这种方法你可以包括各种条件检查，不要忘记你也可以使用或“||”用于选择一组结果。

foreach($Unmanaged as $result)
{
    if($result['speed'] == "100" && $result['size'] == "desk" && $result['uplink'] == "no")
    {
        echo $result['name'];
    }

}

Answer 3

在阵列上运行的一些选项：

foreach（$ array as $ key =＆gt; $ val）
while（list（$ key，$ val）= each（$ array））{
array_walk（$阵列，FUNC）

Answer 4

你去：

function getSwitches($switches,$speed=100,$size='desk',$uplink='no')
{
    $sw = array();

   foreach($switches as $s)
   {
    if(
        $s['speed'] == $speed &&
        $s['size'] == $size &&
        $s['uplink'] == $uplink
    )

    $sw[] = $s;
   }

   return $sw;
}

print_r(getSwitches($Unmanaged,100,'desk','no'));

Answer 5

约束可变的另一种选择：

function matches($values, $constraints) {
    $hits = array();
    foreach($values as $val) {
        $ok = true;
        foreach($constraints as $k => $v) {
            if($val[$k] != $v) $ok = false;
        }
        if($ok) $hits[] = $val;
    }
    return $hits;
}

$Unmanaged = array(
    array('name' => 'SD2005', 'speed' => '1000', 'size' => 'desk', 'uplink' => 'no'),
    array('name' => 'SD2008', 'speed' => '1000', 'size' => 'desk', 'uplink' => 'no'),
    array('name' => 'SR2016', 'speed' => '1000', 'size' => 'rack', 'uplink' => 'no'),
    array('name' => 'SR2024', 'speed' => '1000', 'size' => 'rack', 'uplink' => 'no'),
    array('name' => 'SR2024C', 'speed' => '1000', 'size' => 'rack', 'uplink' => 'no'),
    array('name' => 'SD205', 'speed' => '100', 'size' => 'desk', 'uplink' => 'no'),
    array('name' => 'SD208', 'speed' => '100', 'size' => 'desk', 'uplink' => 'no'),
    array('name' => 'SD216', 'speed' => '100', 'size' => 'desk', 'uplink' => 'no'),
    array('name' => 'SR224G', 'speed' => '100', 'size' => 'rack', 'uplink' => 'yes'),
    array('name' => 'SR216', 'speed' => '100', 'size' => 'rack', 'uplink' => 'no'),
    array('name' => 'SR224', 'speed' => '100', 'size' => 'rack', 'uplink' => 'no'),
    array('name' => 'SR224R', 'speed' => '100', 'size' => 'rack', 'uplink' => 'no')
);

print_r(matches($Unmanaged, array('speed'=>'100', 'size'=>'desk', 'uplink'=>'no')));

输出：

Array
(
    [0] => Array
        (
            [name] => SD205
            [speed] => 100
            [size] => desk
            [uplink] => no
        )

    [1] => Array
        (
            [name] => SD208
            [speed] => 100
            [size] => desk
            [uplink] => no
        )

    [2] => Array
        (
            [name] => SD216
            [speed] => 100
            [size] => desk
            [uplink] => no
        )

)

Answer 6

不妨发布我的解决方案..

function matchElement($haystack, $needleArray) {
    $result = array();
    for($i = 0, $c = count($haystack); $i < $c; $i++) {
        $matchall = true;
        foreach($needleArray as $k => $v) {
            if(!isset($haystack[$i][$k]) || $haystack[$i][$k] != $v) {
                $matchall = false;
                break;
            }
        }
        if($matchall) {
            $result[] = $haystack[$i];
        }
    }

    return $result;
}

print_r(matchElement($Unmanaged, array("speed" => 100, "size" => "rack")));

Answer 7

与其他评论相反，我建议使用数据库。这正是数据库的用途，它们可以比php更好。

PHP数组选择结果

7 个答案: