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将它们回显时遇到问题。最后添加的值是被回显的值。我尝试在 $dreams[$name] 旁边玩 $j 但它只会回显第一个字母。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

你需要

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

这会在 $dreams[$name] 中为每个输入的值创建一个新的数组条目。否则，是的，你每次都用不同的值覆盖 $dreams[$name]。

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

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，您可以将这一行 $dreams[$name] = readline(); 替换为 array_push($dreams[$name], readline());

向多维数组 PHP 添加值而不覆盖上次添加的值

Adding values to multidimensional array PHP without overwritting last added value

php

foreach

multidimensional-array