PHP Join () function

The PHP join () function gets a string that is composed of array elements. This article introduces the use and basic examples of the PHP join () function, which is of interest to the code farmer.

Definition and usage

The join () function returns a string that is composed of array elements.

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

Note: the join () function accepts two parameter orders. However, for historical reasons, explode () is not possible, and you must ensure that the separator parameter precedes the string parameter.

Note: The separator parameter of the join () function is optional. However, for backwards compatibility, it is recommended that you use two parameters.

Grammar

join(separator,array)

Parameters	Description
Separator	Optional. Specifies what is placed between the elements of the array. The default is "" (an empty string).
Array	Necessary. An array to combine as a string.

Technical details

return value:	Returns a string that is composed of array elements.
PHP version:	4 +
Update log:	In PHP 4.3.0, theseparator parameter becomes optional.

Instance

Separate the array elements with different characters:

<?php$arr = Array (' Hello ', ' world! ', ' I ', ' love ', ' shanghai! '); echo Join ("", $arr). " <br> "; Echo Join (" + ", $arr)." <br> "; Echo Join ("-", $arr)." <br> "; Echo Join (" X ", $arr);? >

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PHP Join () function