Php extracts the url code of a website from a string

Example

The code is as follows:

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$ PostInfo ['answer2'] = 'Yes, commercial loans can be shared by 36%, and provident fund loans can be shared by 16% ||| you can extract the balance from your account for down payment, then, each month, commercial loans can be shared by 36%, and provident fund loans can be shared by 16% | yes, now the class a provident fund is the proportion of the http://www.111cn.net is the wage base of 34% | ah yes | can be shared, Class A 34% '; Preg_match_all ("/http: [\/] {2} [a-z] + [.] {1} [a-z \ d \-] + [.] {1} [a-z \ d] * [\/] * [A-Za-z \ d] * [\/] * [A-Za-z \ d] */", $ postInfo ['answer2'], $ array2 ); Print_r ($ array2 );   If (! Empty ($ array2 [0]) { Foreach ($ array2 [0] as $ k => $ v ){ $ PostInfo ['answer2'] = str_replace ($ array2 [0] [$ k], '', $ postInfo ['answer2']);  } } The result is ( [0] => Array         ( Http://www.111cn.net         ) )