How to use php join

PHP join() function

Combines array elements into a string:

<?php
    $arr = array(&#39;Hello&#39;,&#39;World!&#39;,&#39;I&#39;,&#39;love&#39;,&#39;Shanghai!&#39;);
    echo join(" ",$arr);
?>

Definition and usage

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

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

Note: The join() function accepts two parameter orders. However, due to historical reasons, explode() does not work. You must ensure that the separator parameter comes before the string parameter.

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

Syntax

join(separator,array)

Parameters	Description
separator	Optional. Specifies what is placed between array elements. Default is "" (empty string).
array	Required. Arrays to be combined into strings.

Technical details

##Return value: Returns a string composed of array elements. PHP Version: 4 Change Log: In PHP 4.3.0,

	separator Parameter becomes optional.

More examples

Separate array elements with different characters:

<?php
    $arr = array(&#39;Hello&#39;,&#39;World!&#39;,&#39;I&#39;,&#39;love&#39;,&#39;Shanghai!&#39;);
    echo join(" ",$arr)."<br>";
    echo join("+",$arr)."<br>";
    echo join("-",$arr)."<br>";
    echo join("X",$arr);
?>

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