向多维数组PHP添加值，而不覆盖上次添加的值

Question

我在向关联多维数组添加值并回显这些值时遇到了问题。最后一个添加的值就是要回显的值。我试着把$j放在$dreams[$name]旁边玩，但后来它只回显了第一个字母。我的代码如下：

<?php
echo "How many people should I ask their dreams?" . PHP_EOL;
$many = readline();
$dreams = [];
if (is_numeric($many)) {
for ($i = 1; $i <= $many; $i++) {
echo "What is your name?" . PHP_EOL;
$name = readline();
echo "How many dreams are you going to enter?" . PHP_EOL;
$numberDreams = readline();
if (is_numeric($numberDreams)) {
for ($j = 1; $j <= $numberDreams; $j++) { 
echo "What is your dream?" . PHP_EOL;
$dreams[$name] = readline();
}
}
}
echo "In jouw bucketlist staat: " . PHP_EOL;
foreach ($dreams as $key => $value) {
echo $key . "'s dream is: " . $value . PHP_EOL;
}
} else {
exit($many . ' is not a number, try again.');
}
?>

Answer 1

您需要

$dreams[$name][] = readLine();

这将在$dreams[$name]中为每个输入的值创建一个新的数组条目。否则，是的，您每次都会用不同的值覆盖$dreams[$name]。

然后，要输出，你需要两个循环，一个用于名称，另一个用于梦想——它应该是输入过程的镜像——因为实际上你是在用相同的数据结构反向进行过程：

foreach ($dreams as $name => $entries) {
echo $name . "'s dreams are: ". PHP_EOL;

foreach ($entries as $dream)
{
echo $dream.PHP_EOL;
}
}

Answer 2

您可以使用array_push()函数，也可以将此行$dreams[$name] = readline();替换为array_push($dreams[$name], readline());