Question

$outp = "[";
for($x = 1; $x <= 5; $x++) {

if ($outp != "[") {
    $outp .= ",";
}
if ($ARRAY[$x]['name'] == "davies") {
    $outp .= '{"name":"' . $ARRAY[$x]["name"] . '",';
    $outp .= '"server_name":"' . $ARRAY[$x]["server"] . '",';
    $outp .= '"uptime":"' . $ARRAY[$x]["uptime"] . '",';
    $outp .= '"bytes_in":"' . $ARRAY[$x]["bytes-in"] . '",';
    $outp .= '"bytes_out":"' . $ARRAY[$x]["bytes-out"] . '"}';
}
}
$outp .="]";

echo ($outp);

您好我试图从阵列中提取特定值，但我不知道该怎么做。所以我尝试将for循环函数与if语句一起使用。我想要做的就是搜索价值＆＃34; davies＆＃34;在数组[name]中，然后从那里根据array[name]=davies值拉出剩余的值。

我的阵列示例：

Array
(
[0] => Array
    (
        [.id] => *2
        [server] => hotspot1
        [name] => davies
        [profile] => davies
        [uptime] => 1d6m42s
        [bytes-in] => 62669946
        [bytes-out] => 459466004
    )

[1] => Array
    (
        [.id] => *3
        [server] => hotspot1
        [name] => eric
        [uptime] => 2h14m13s
        [bytes-in] => 6836983
        [bytes-out] => 15648003
    )

[2] => Array
    (
        [.id] => *4
        [server] => hotspot1
        [name] => teck
        [uptime] => 1h46m25s
        [bytes-in] => 11847933
        [bytes-out] => 166875279
    )

[3] => Array
    (
        [.id] => *5
        [server] => hotspot1
        [name] => andy
        [uptime] => 23h13m38s
        [bytes-in] => 31241731
        [bytes-out] => 321399768
    )
)

Answer 1

你可以使用array_filter来过滤你想要的相应标准的值;结果将返回过滤后的值;

示例：

$students = array(
    array('name' => 'julia', 'age' => 15),
    array('name' => 'john', 'age' => 16),
    array('name' => 'carlo', 'age' => 14),
    array('name' => 'arjay', 'age' => 12),
    array('name' => 'francis', 'age' => 11),
    array('name' => 'carlo', 'age' => 15),
);

$filtered_students = array_filter($students, function($row) { 
    if($row['name'] == 'carlo'){ 
        return true;
    } 
});

print_r($filtered_students);

结果将是：

Array
(
    [2] => Array
        (
            [name] => carlo
            [age] => 14
        )

    [5] => Array
        (
            [name] => carlo
            [age] => 15
        )

)

注意到数组上仍然有原始键。如果你想重置计数，只需重新分配;

$filtered_students = array_values($filtered_students);

结果：

Array
(
    [0] => Array
        (
            [name] => carlo
            [age] => 14
        )

    [1] => Array
        (
            [name] => carlo
            [age] => 15
        )

)

Answer 2

试试这个：

foreach( $ARRAY as $value ){
    if( $value['name] == 'davies' ) {
        echo $value['server'] . '<br /'>;
        // And anything else you'd want to echo.
    }
}

Answer 3

编写一个循环遍历数组的函数，并返回记录字段和值与搜索条件匹配的元素记录

function returnRecord($Array, $field, $value) {
    foreach ($Array as $record) {
        if ($record[$field] && $record[$field] == $value) {
            return $record;
        }
    }
    return undef;
}

// Test run
$Array = array(
    array('name' => 'davies', '.id' => '*2'),
    array('name' => 'eric', '.id' => '*3'),
    array('name' => 'teck', '.id' => '*4'),
    array('name' => 'andy', '.id' => '*5')
);

$record = returnRecord($Array, 'name', 'davies');
if ($record) {
    echo "NAME: ".$record['name'];
    echo "\n";
    echo "ID: ".$record['.id'];
    echo "\n";
}
else {
    echo "Record not found";
}

使用字符串从数组PHP中拉出一个值

3 个答案: