php 数组转为字符串

$array = ['apple', 'banana', 'cherry'];
$string = implode(', ', $array);
echo $string; // 输出: apple, banana, cherry

$array = ['apple', 'banana', 'cherry'];
$string = json_encode($array);
echo $string; // 输出: ["apple","banana","cherry"]

$array = ['apple', 'banana', 'cherry'];
$string = serialize($array);
echo $string; // 输出: a:3:{i:0;s:5:"apple";i:1;s:6:"banana";i:2;s:6:"cherry";}

$array = ['苹果', '香蕉', '樱桃'];
$string = implode(', ', $array);
echo mb_convert_encoding($string, 'UTF-8', 'auto');

$array = ['apple', 'banana', fopen('test.txt', 'r')];
$json = json_encode($array, JSON_ERROR_ON_ERROR);
if ($json === false) {
    echo "JSON 编码错误: " . json_last_error_msg();
} else {
    echo $json;
}