Question

我想在这个数组中找到国家iso代码：

$countryArray = array(
        'AD' => array(
        'country_name' => 'ANDORRA',
        'dial_code' => '376'
        ),
        'AE' => array(
        'country_name' => 'UNITED ARAB EMIRATES',
        'dial_code' => '971'
        ),
        'AF' => array(
        'country_name' => 'AFGHANISTAN',
        'dial_code' => '93'
        ));

我的条件是：

foreach($countryArray as $row){
    if($row->dial_code == '93'){
        echo $row; //???
    }
}

在echo语句中，我想在这个例子中显示AF。但结果是错误的。

Answer 1

foreach($countryArray as $key => $row){ if($row['dial_code'] == 93){ echo $key; //??? } }

尝试这个，只需在foreach循环中使用$key变量

Answer 2

foreach语句中的

$key=>$value对将当前键元素分配给$ key，将当前值分配给$ value。我们知道foreach语句适用于内部指针。

$countryArray = array(
    'AD' => array(
    'country_name' => 'ANDORRA',
    'dial_code' => '376'
    ),
    'AE' => array(
    'country_name' => 'UNITED ARAB EMIRATES',
    'dial_code' => '971'
    ),
    'AF' => array(
    'country_name' => 'AFGHANISTAN',
    'dial_code' => '93'
    ));
foreach($countryArray as $key =>$value){
if($value['dial_code'] == 93){
    echo $key;
}

}

Answer 3

试试这个

foreach($countryArray as $k => $row){
    if($row["dial_code"] == 93){
        echo $k;
    }
}

Answer 4

我解决了它，在代码工作正常

$countryArray = array(
        'AD' => array(
        'country_name' => 'ANDORRA',
        'dial_code' => '376'
        ),
        'AE' => array(
        'country_name' => 'UNITED ARAB EMIRATES',
        'dial_code' => '971'
        ),
        'AF' => array(
        'country_name' => 'AFGHANISTAN',
        'dial_code' => '93'
        ));

foreach ($countryArray as $keys=> $arraycountry){
    foreach($arraycountry as $key => $value)
    {
        if($value == '93'){
            echo $keys; //???
        }   
    }
}

Php多阵列foreach循环

4 个答案: