Implementation code for php regular judging url address and automatically converting it into hyperlink

Let me introduce you to a piece of PHP code that is used to determine the URL address and automatically convert it into a hyperlink. It uses a regular expression to match the URL in a string, and then converts the URL into a hyperlink and clicks to access the address. Friends in need can refer to it.

The code is as follows:

<?php
/**
 * php正则判断url 自动转换为超链接
 * site: bbs.it-home.org
*/
function autolink($foo)   
{   
    $foo = eregi_replace('(((f|ht)黑蕉tp://)[-a-zA-Z0-9@:%_/+.~#?&//=]+)', '/1', $foo);   
    if( strpos($foo, "http") === FALSE ){   
    $foo = eregi_replace('(www.[-a-zA-Z0-9@:%_/+.~#?&//=]+)', '/1', $foo);   
}else{   
    $foo = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_/+.~#?&//=]+)', '/1/2', $foo);   
}   
return $foo;   
}  
?>