Php extracts the url code of a website from a string

Today, I wrote a Q & A system and found many people are connected. as the business department asked us to filter out the website address, I will share with you an example of the function for extracting string url addresses? Php $ postInfo [#39; answer2... today, I wrote a Q & A system and found that many people are connected. as the business department wants us to filter out the website address, I will share with you a function to extract the string url address.

Example

 $ V) {$ postInfo ['answer2'] = str_replace ($ array2 [0] [$ k], '', $ postInfo ['answer2']); }}?>

The result is

([0] => Array ([0] => http://www.phprm.com ))

Tutorial URL:

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