What is the usage of the implode function in PHP?

The implode function combines the elements of an array into a single string, separated by a specified delimiter.

Syntax: implode(separator, array)

Parameters:

1. separator: an optional parameter used to separate the elements of an array, defaulting to an empty string.
2. array: Required parameter, the array to be concatenated.

Return value:
Return a string formed by concatenating the elements in the array.

Original: 我很高兴能在这里见到你。
Paraphrased: I am delighted to see you here.

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

In the example above, concatenate the elements of the array $array separated by spaces into a string $string, then output the string $string.