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PHP: join() function

Description

The join() function is used to join array elements with a string. The join() function is similar to implode() function.

Version:

(PHP 4 and above)

Syntax:

 join (string_join, array_name)

Parameters:

Name Description Required /
Optional		 Type
string_join String-join is work as a connector between the array elements. The default value is a empty string (" "). Optional String
array_name The array who's elements will be joined. Required Array

Return values:

A string representation of all the array elements in the same order, with the string_join string between each array element.

Value Type: String.

Pictorial Presentation

php-string-join()

Example: 

<?php
 $array_name=array('1','2','3','4','....');
 $join_string=join(",", $array_name);
 echo $join_string;
 echo '<br>';
 $array_name=array('A','B','C','D','E');
 $join_string=join("-", $array_name);
 echo $join_string;
 ?>

Output:

1,2,3,4,....
A-B-C-D-E

View the example in the browser

See also

PHP Function Reference

Previous: implode
Next: ltrim



PHP: Tips of the Day

In PHP, there are two versions of logical AND and OR operators.

Operator True if
$a and $b Both $a and $b are true
$a && $b Both $a and $b are true
$a or $b Either $a or $b is true
$a || $b Either $a or $b is true

Note that the && and || opererators have higher precedence than and and or. See table below:

Evaluation Result of $e Evaluated as
$e = false || true True $e = (false || true)
$e = false or true False ($e = false) or true

Because of this it's safer to use && and || instead of and and or.