php 数组输出字符串

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

$array = ['apple', 'banana', 'cherry'];
$string = '';
foreach ($array as $value) {
    $string .= $value . ', ';
}
echo rtrim($string, ', '); // 输出: apple, banana, cherry

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

$array = ['apple', 123, 'cherry'];
$string = implode(', ', array_map('strval', $array));
echo $string; // 输出: apple, 123, cherry

$array = [];
if (!empty($array)) {
    $string = implode(', ', $array);
    echo $string;
} else {
    echo 'Array is empty';
}

$array = ['apple\n', 'banana\t', 'cherry'];
$string = implode(', ', array_map('htmlspecialchars', $array));
echo $string; // 输出: apple
, banana	, cherry