How PHP implements the conversion of URLs in text to links

In fact, I in the "text in the URL to a clickable link JavaScript, PHP custom Function," the article describes how the PHP code implementation of the URL into a link to the method, today to introduce a more concise version, first look at the source code of PHP:

/*** author:seedz* from:http://code.seebz.net/p/autolink-php/**/function autolink ($str, $attributes = Array ()) {$  Attrs = '; foreach ($attributes as $attribute = = $value) {$attrs. = "{$attribute}=\" {$value}\ "";} $str = ". $str; $str = Preg_replace ("([^" =\]) ((HTTP|HTTPS|FTP|FTPS)://[^\s<]+[^\s<\.)]) ' I ', ' $1<a href= ' $ "rel=" external nofollow "'. $attrs. ' >$2</a> ', $str); $str = substr ($str, 1); return $STR;}

How, very concise! Look at the API documentation for the function:

Grammar

String Autolink (String $str [, Array $attributes = Array ()])

Parameter introduction

str– Required (String type data). You need to query for the replaced text.
Attributes-Optional (Array type data). Replaces some optional parameters for the link.

return value

Returns the replaced text.

Autolink () Call method

Autolink is also very convenient to use, we can only pass one parameter, which is required to replace the character text. For example:

<?php $str = ' A link:http://example.com/?param=value#anchor. '; $str = Autolink ($STR); Echo $str; A Link: <a href= "Http://example.com/?param=value#anchor" rel= "External nofollow" >http://example.com/?param= Value#anchor</a>.? >

In addition, we can set up some additional link parameters, can let the generated link in a new window open, or do not want the search engine index to replace the link. For example:

<?php $str = ' http://example.com/'; $str = Autolink ($str, Array ("target" = "_blank", "rel" = "nofollow")); Echo $str; <a href= "http://example.com/" rel= "external nofollow" target= "_blank" >http://example.com/</a>?>