How to convert an array to a string in PHP?

In PHP, you can use the implode() function to convert an array into a string. The implode() function concatenates the values of the array to form a single string, and then returns that string. For example:

$array = array('Hello', 'World');
$string = implode(', ', $array);
echo $string; // 输出：Hello, World

In the example above, the array $array contains two elements Hello and World. When using the implode() function to convert the array into a string, a comma and space are used as separators, resulting in the string Hello, World.