PHP，从多维数组中的多个关联数组中回显一个特定值

Question

我只想输出每个数组中的名字。我在下面的代码中的评论解释。我不要钥匙，只是价值。正如您将从我下面的描述中看到的那样，我很想有一个可以产生预期结果的循环。是否有一个循环只会 return 'firstName' 值？谢谢....

<?php
$contacts = array(
    array(
        'firstName' => "Hoth",
        'lastName' => "Omiaenoed",
        'address'=> "76 S. Mammoth St.",
        'city' => "Westfield",
        'state' => "MA",
        'zip' => "01085",
    ),
    array(
        'firstName' => "Akae",
        'lastName' => "Uniaebul",
        'address'=> "8038 Shadow Brook Street",
        'city' => "Ocoee",
        'state' => "FL",
        'zip' => "34761",
    ),
    array(
        'firstName' => "Upae",
        'lastName' => "Aesuudoes",
        'address'=> "7044 N. School St.",
        'city' => "Riverdale",
        'state' => "GA",
        'zip' => "30274",
    ),
    array(
        'firstName' => "Doer",
        'lastName' => "Waezoeyo",
        'address'=> "338 Old Griffin St.",
        'city' => "Antioch",
        'state' => "TN",
        'zip' => "37013",
    ),
    array(
        'firstName' => "Ozae",
        'lastName' => "Iraeoewif",
        'address'=> "65 West Chapel Dr.",
        'city' => "San Angelo",
        'state' => "TX",
        'zip' => "76901",
    ),
    array(
        'firstName' => "Naes",
        'lastName' => "Ebaeaeraesh",
        'address'=> "34 Tower Street",
        'city' => "Huntersville",
        'state' => "NC",
        'zip' => "28078",
    )
);

/* I want to echo (print) just the first names from each array. I hoped I could use a "foreach" loop to do this and it seemed to me the one just below should work */

foreach ($contacts['firstName'] as $fname) {
    while (list( , $firstn) = each($fname)) {
        echo "$firstn <br/>";
    }
    echo "------------------------------------------<br/>";
}

/* But it does not. Adding in ['firstName'] does not work. So, I have to use this one below, for lack of knowing what else to do. */

echo $contacts[0]['firstName']; echo "<br/>";
echo "------------------------------------------<br/>";
echo $contacts[1]['firstName']; echo "<br/>";
echo "------------------------------------------<br/>";
echo $contacts[2]['firstName']; echo "<br/>";
echo "------------------------------------------<br/>";
echo $contacts[3]['firstName']; echo "<br/>";
echo "------------------------------------------<br/>";
echo $contacts[4]['firstName']; echo "<br/>";
echo "------------------------------------------<br/>";
echo $contacts[5]['firstName']; echo "<br/>";
echo "------------------------------------------<br/>";

/* I used this to output each complete array and it works just fine. */

foreach ($contacts as $info) {
    while (list( , $lines) = each ($info)) {
        echo "$lines <br/>";
    }
    echo "<hr/>";
}    

?>

Answer 1

  <?php   foreach ($contacts as $firtname) {
     echo $firtname['firstName'] ;   
    }
?>

我想这就是你要找的..

Answer 2

如果使用 php 5.5+

则可以使用 array columns

$list_fn = array_column($contacts, 'firstName');

Answer 3

 foreach ($contacts as $contact)
 { 
 echo $contact['firstName'];
 }

Answer 4

以下是您可以执行的操作。

$first_names = array_column($contacts, 'firstName'); // This returns what you need
foreach( $first_names as $name ){
    echo $name . "<br/>";
    echo "------------------------------------------<br/>";
}

希望对您有所帮助！

Answer 5

foreach($contacts as $contact){
    echo $contact['firstName']."</br>";
}

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