php 序列通过带有 if-loop 的数组

Question

我有以下数组：

$moods = array("neutral", "happy", "sad");
$newarray= "";

我想使用一个 if 循环按顺序遍历数组 $mood 并根据选择的 $moods 值给出不同的输出

for ($x = 1; $x <= 7; $x++) {

[insert code for sequencing through $moods here]

if ($moods == "neutral") {
$output1 = "1";
$newarray.= $output1
  }
  else {
$output2 = "0";
$newarray.= $output2
}

所需的输出是 $newarray 填充了 $output1 和 $output2 值，这样

$newarray= "1001001";

我试过使用 array_rand:

for ($x = 1; $x <= 7; $x++) {

$mood= array_rand($moods,1);

if ($mood == "neutral") {
$output1 = "1";
$newarray.= $output1
  }
  else {
$output2 = "0";
$newarray.= $output2
}

但问题是它从 $moods 数组中选择一个随机变量，而不是按顺序遍历它。

Answer 1

您可以使用下标 (

[]

) 运算符引用数组的元素：

for ($x = 1; $x <= 3; $x++) {
    $mood = $moods[i];
    if ($mood == "neutral") { # Note that this should relate to $mood, not $moods
        $output1 = "1";
        $newarray.= $output1;
    } else {
        $output2 = "0";
        $newarray.= $output2;
    }
}

Answer 2

试试这个。

$moods = ['neutral', 'happy', 'sad'];
$newarray= '';

foreach($moods as $mood) {
   $newarray .= $mood == 'neutral' ? '1' : '0';
}

根据更新的问题更新

$moods = ['neutral', 'happy', 'sad'];
$newarray= '';

// initail index should be 0 to access correct value in $moods
for($i = 0, $i <= 6, $i++) {
   $newarray .= $moods[$i % (count($moods) - 1)] == 'neutral' ? '1' : '0';
}