php怎么将数组转换为字符串

implode($glue, $array) 
//或者 
implode($array)

<?php
$arr = array(&#39;Hello&#39;,&#39;World!&#39;,&#39;Beautiful&#39;,&#39;Day!&#39;);
echo implode(" ",$arr);
?>

Hello World! Beautiful Day!

<?php
// PHP数组转字符串的方法
// 方法一:implode(glue, pieces)
$arr = [&#39;Lucy&#39;,&#39;Mike&#39;,&#39;Jery&#39;,&#39;Haly&#39;];
$str = implode(&#39;,&#39;, $arr);
// var_dump($str);
//方法二，利用循环遍历数组元素拼接成字符串
$arr1 = [&#39;Lucy&#39;,&#39;Mike&#39;,&#39;Jery&#39;,&#39;Haly&#39;];
$str1 = &#39;&#39;;
foreach ($arr1 as $key => $value) 
{
$str1 .=&#39;,&#39;.$value; 
}
var_dump($str1);