# PHP join() Function

PHP String Reference

## Example

Join array elements with a string:

<?php
$arr = array('Hello','World!','Beautiful','Day!');
echo join(" ",$arr);
?>
Run example »

## Definition and Usage

The join() function returns a string from the elements of an array.

The join() function is an alias of the implode() function.

Note: The join() function accept its parameters in either order. However, for consistency with explode(), you should use the documented order of arguments.

Note: The separator parameter of join() is optional. However, it is recommended to always use two parameters for backwards compatibility.

## Syntax

join(separator,array)

Parameter | Description
--- | ---
separator | Optional. Specifies what to put between the array elements. Default is "" (an empty string)
array | Required. The array to join to a string

## Technical Details

Return Value: | Returns a string from elements of an array
PHP Version: | 4+
Changelog: | The separator parameter became optional in PHP 4.3.0.

## More Examples

## Example 1

Separate the array elements with different characters:

<?php
$arr = array('Hello','World!','Beautiful','Day!');
echo join(" ",$arr)."<br>";
echo join("+",$arr)."<br>";
echo join("-",$arr)."<br>";
echo join("X",$arr);
?>
Run example »

PHP String Reference

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