PHP：在对象数组中高效查找特定值并优化循环逻辑

<?php
$entries = array(
  (object) [
    "uid" => "1234",
    "item" => "奖品A",
    "text_prefix" => "恭喜",
    "text_suffix" => "获得",
    "prize_link" => "link_A",
    "data_captcher" => true
  ],
  (object) [
    "uid" => "5678",
    "item" => "奖品B",
    "text_prefix" => "恭喜",
    "text_suffix" => "获得",
    "prize_link" => "link_B",
    "data_captcher" => false
    ],
);

// 假设用户提交的 code
$code = "1234"; 
// $code = "5678"; // 如果是5678，则会正常返回

$value = 'false'; // 初始化结果变量

// 使用 for 循环遍历数组
for ($x = 0; $x < count($entries); $x++) {
  if ($entries[$x]->uid == $code) {
    // 如果找到匹配项，赋值给 $value
    $value = [
      "uid" => $entries[$x]->uid,
      "item" => $entries[$x]->item,
      "text_prefix" => $entries[$x]->text_prefix,
      "text_suffix" => $entries[$x]->text_suffix,
      "prize_link" => $entries[$x]->prize_link,
      "data_captcher" => $entries[$x]->data_captcher,
    ];
  } else {
    // 如果当前项不匹配，将 $value 设置为 'false'
    // 这是问题的关键所在
    $value = 'false';
  }
}

echo json_encode($value); // 最终输出结果
?>

<?php
$entries = array(
  (object) [
    "uid" => "1234",
    "item" => "奖品A",
    "text_prefix" => "恭喜",
    "text_suffix" => "获得",
    "prize_link" => "link_A",
    "data_captcher" => true
  ],
  (object) [
    "uid" => "5678",
    "item" => "奖品B",
    "text_prefix" => "恭喜",
    "text_suffix" => "获得",
    "prize_link" => "link_B",
    "data_captcher" => false
    ],
);

$code = "1234"; // 假设用户提交的值
$value = 'false'; // 默认值，如果未找到则保持此值

for ($x = 0; $x < count($entries); $x++) {
  if ($entries[$x]->uid == $code) {
    $value = [
      "uid" => $entries[$x]->uid,
      "item" => $entries[$x]->item,
      "text_prefix" => $entries[$x]->text_prefix,
      "text_suffix" => $entries[$x]->text_suffix,
      "prize_link" => $entries[$x]->prize_link,
      "data_captcher" => $entries[$x]->data_captcher,
    ];
    break; // <== 找到匹配项后立即终止循环
  }
  // 注意：这里移除了 else 块。如果找到匹配项，循环会立即终止；
  // 如果循环完成仍未找到匹配项，则 $value 会保持其初始的 'false'。
}

echo json_encode($value); // 现在会输出正确的结果 {"uid":"1234", "item":"奖品A", ...}
?>

<?php
$entries = array(
  (object) ["uid" => "1234", "item" => "奖品A"],
  (object) ["uid" => "5678", "item" => "奖品B"],
);

$code = "1234";
$value = 'false';

foreach ($entries as $entry) { // 直接将每个元素赋值给 $entry 变量
  if ($entry->uid == $code) {
    $value = [
      "uid" => $entry->uid,
      "item" => $entry->item,
      // ... 其他属性
    ];
    break; // 同样需要 break
  }
}

echo json_encode($value);
?>

<?php
$entries = array(
  (object) ["uid" => "1234", "item" => "奖品A"],
  (object) ["uid" => "5678", "item" => "奖品B"],
  (object) ["uid" => "1234", "item" => "奖品C"] // 示例：有重复UID
);

$code = "1234";
$value = 'false';

// 使用 array_filter 过滤出所有匹配的条目
$foundEntries = array_filter($entries, function($entry) use ($code) {
    return $entry->uid == $code;
});

if (!empty($foundEntries)) {
    // 如果找到匹配项，使用 reset() 获取第一个匹配的对象
    $firstMatch = reset($foundEntries);
    $value = [
        "uid" => $firstMatch->uid,
        "item" => $firstMatch->item,
        // ... 其他属性
    ];
}
// 如果 $foundEntries 为空，则 $value 保持 'false'

echo json_encode($value); // 输出第一个匹配项 {"uid":"1234","item":"奖品A"}
?>