php动态添加关联数组

$assocArray = array();
$assocArray["name"] = "John";
$assocArray["age"] = 30;
$assocArray["city"] = "New York";

// 或者
$assocArray = [];
$assocArray["name"] = "John";
$assocArray["age"] = 30;
$assocArray["city"] = "New York";

$assocArray = array();
array_push($assocArray, "John", 30, "New York");

// 使用匿名函数来设置键值对
$assocArray = array_map(function($value, $key) {
    return array($key => $value);
}, array("John", 30, "New York"), array("name", "age", "city"));

if (!isset($assocArray["name"])) {
    $assocArray["name"] = "John";
} else {
    echo "Key 'name' already exists.";
}

$assocArray["age"] = (int) 30; // 确保年龄是整数类型