The **`join()` method** returns an entire array as a string. The method separates elements with a specified separator; the default separator is a comma (,).

The join method in PHP is used to concatenate an array to return a string. The interesting thing is that the array can be concatenated using a separator. It can be a space (" "), a hyphen (-), a character, etc.

# Syntax
```
join(separator,array)
```
# Parameters
1. **`separator`**: An optional parameter -- it refers to the separator used to concatenate a given array.
2. **`array`**: a required parameter -- it refers to the array that needs to be converted to a string.



<?php
$arr1 = array('Welcome','to','Educative!');
// array concatenated using a space
$var = join(" ",$arr1);
echo $var."\n";

// array concatenated using a hyphen
$var = join("-",$arr1);
echo $var."\n";

// array concatenated using no separator
$var = join($arr1);
echo $var."\n";

?>

What is the join method in PHP?

The join() method converts an array to a string using a specified separator.