优化PHP代码（用逗号连接单词，删除最后一个逗号）

Question

我几乎总是使用此方法从数组（“ Word1”，“ Word2”，“ Word3”）中获取“ Word1，Word2，Word3”

这是最短或可接受的方法吗？ 有更好的解决方案吗？

$sentence = '';
foreach ($words as $word) {
    $sentence .= $word . ", ";
}
$final_sentence = substr($sentence, 0, -2);

echo $final_sentence; //outputs contents of $words array separated by ,

Answer 1

<?php
$sentence = implode(', ', $words);
?>

Answer 2

使用implode ：

$final_sentence = implode(", ", $words);

Answer 3

$final_sentence = implode(', ',$words)