我需要一些作业帮助。我被卡住是因为我不断得到：“注意：数组到字符串的转换”。该作业专门说要使用嵌套的foreach循环遍历二维关联数组。我已经成功地遍历了内循环。我不确定如何克服“数组到字符串转换”错误。为了理智，我添加了NFL球队的柜台。我对足球一无所知。有小费吗？
<!DOCTYPE html>
<html lang='en' dir='ltr'>
<head>
<meta charset='utf-8'>
<title>Program Three</title>
<link rel='stylesheet' href='main.css'>
</head>
<body>
<main>
<?php
echo '<h1>Two Demensional Array\'s</h1>';
echo '<hr>';
$nfl['Buccaneers'] = array(
'QB' => 'Winston',
'DT' => 'Martin',
'OT' => 'Evans'
);
$nfl['Broncos'] = array(
'QB' => 'Attaochu',
'RB' => 'Bailey',
'WR' => 'Bausby'
);
$nfl['Browns'] = array(
'QB' => 'Zimmer',
'LB' => 'McCray',
'SQ' => 'Davis'
);
$array_keys = array_keys($nfl);
$nfl_team_counter = 0;
foreach ($nfl as $key => $value) {
$nfl_team_counter++;
echo '<b>NFL Team # ' . $nfl_team_counter . '.<br></b>';
foreach ($value as $k => $v) {
echo $k . ' is ' . $v . '.<br>';
}
echo '<br>';
}
?>
</main>
<footer class='text_align_center'>
<hr> <small> SomeWebsite © -- <?php echo date('M-jS-Y'); ?> </small>
</footer>
</body>
</html>
该键在您的外循环中定义为$key。该变量始终可用。因此您可以随时打印。
foreach ($nfl as $key => $value) {
$nfl_team_counter++;
echo '<b>NFL Team # ' . $nfl_team_counter . '.<br></b>';
foreach ($value as $k => $v) {
echo "$key => $k => $v\n"; // Buccaneers => QB => Winston
}
echo '<br>';
}