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@ 2014-03-14T08:21:25Z

<?php 
    function replace($url){   
         $url = str_replace("\\r","\r",$url);   
         $url = str_replace("\\n","\n<BR>",$url);   
         $url = str_replace("\\n\\r","\n\r",$url);   

         $in=array(   
              '`((?:https?|ftp)://\S+[[:alnum:]]/?)`si',   
              '`((?<!//)(www\.\S+[[:alnum:]]/?))`si', 
              '`((?:https?|ftp)://\S+[[:alnum:]]\.(png|jpeg|jpg|gif)\b)`si',     
             //'`((?<!//)(www\.\S+[[:alnum:]]\.(png|jpeg|jpg|gif)\b))`si'  
         );   
         // это для ссылок  и фото 
         $out=array(   
              '<a style="color:navy;" href="$1"  rel="nofollow">$1</a>',   
              '<a style="color:navy;" href="http://$1" rel=\'nofollow\'>$1</a>', 
              '<img src="$1"  rel="nofollow">',   
             //'<img src="http://$1" rel=\'nofollow\'>'   
         );   
         return preg_replace($in, $out, $url);   
     }
echo replace('dfd dfdf http://site.ru/ ddd fff http://img.com/pic.png text');

Output for git.master, git.master_jit, rfc.property-hooks: dfd dfdf <a style="color:navy;" href="http://site.ru/" rel="nofollow">http://site.ru/</a> ddd fff <a style="color:navy;" href="<img src="http://img.com/pic.png" rel="nofollow">" rel="nofollow"><img src="http://img.com/pic.png" rel="nofollow"></a> text

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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