用字符串从数组 PHP 中提取一个值 - Pulling a value out from array PHP with string

Pulling a value out from array PHP with string

本文关键字：一个提取字符串数组 PHP | 更新日期: 2023-09-27

$outp = "[";
for($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);

嗨，我正在尝试从数组中提取一个特定值，但我不确定该怎么做。所以我尝试将 for 循环函数与 if 语句一起使用。我想做的是我想在数组[name]中搜索值"davies"，然后仅根据array[name]=davies值从那里提取其余值。

我的数组示例：

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
    )
)

您可以使用

array_filter来过滤具有所需相应条件的值; 结果将返回过滤后的值;

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
        )
)

注意到阵列上仍然有原始键。如果要重置计数，只需重新分配即可;

$filtered_students = array_values($filtered_students);

结果：

Array
(
    [0] => Array
        (
            [name] => carlo
            [age] => 14
        )
    [1] => Array
        (
            [name] => carlo
            [age] => 15
        )
)

编写一个函数，该函数循环遍历数组并返回记录字段和值与您的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";
}

试试这个：

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