[英]How to list key-value associative array using foreach
假設我們有一個數組:
$aa = array('student1'=>array(1,2,3),'student2'=>array(3,2,4),'student3'=>array(4,3,5));
我想要一個如下的HTML輸出:
<ul>
<li>student1
<ul>
<li>1</li>
<li>1</li>
<li>1</li>
</ul>
</li>
<li>student2
<ul>
<li>3</li>
<li>2</li>
<li>4</li>
</ul>
</li>
<li>student3
<ul>
<li>4</li>
<li>3</li>
<li>5</li>
</ul>
</li>
</ul>
但是我所能做的就是
<ul>
<li>
<ul>
<li>1</li>
<li>1</li>
<li>1</li>
</ul>
</li>
<li>
<ul>
<li>3</li>
<li>2</li>
<li>4</li>
</ul>
</li>
<li>
<ul>
<li>4</li>
<li>3</li>
<li>5</li>
</ul>
</li>
</ul>
換句話說,我無法為每個內部數組打印鍵。 怎么做?
我已經編寫了類似的代碼:
echo '<ul>';
foreach($aa as $a)
{
echo '<li>' . /*Here it should be written the current student name*/ '<ul>';
foreach($a as $b)
{
echo '<li>' . $b . '</li>';
}
echo '</ul></li>';
}
echo '</ul>';
<ul>
<?php
foreach ($aa as $name => $values) {
echo "<li>$name\n";
echo "<ul>\n";
foreach ($values as $value) {
echo "<li>$value</li>\n";
}
echo "</ul>\n";
echo "</li>\n";
}
?>
</ul>
像這樣打印數組:
echo "<pre>";
print_r($array);
echo "</pre>";
這樣,您可以查看數組的內部結構。
然后,您可以像這樣列出它:
$a = array(
"one" => 1,
"two" => 2,
"three" => 3,
"seventeen" => 17
);
foreach ($a as $k => $v) {
echo "\$a[$k] => $v.\n";
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.