The judgment about Ajax

The next paragraph is to determine if there is an AJAX request
But it's really hard to understand
Can you comment

Determine if there is an AJAX request $act =!empty ($_get[' act ')? $_get[' act ': '; if ($act = = ' Cat_rec ') {    $rec _array = Array (1 = ' best ', 2 = ' new ', 3 = ' hot ');    $rec _type =!empty ($_request[' Rec_type ')? Intval ($_request[' Rec_type '): ' 1 ';    $cat _id =!empty ($_request[' cid ")? Intval ($_request[' CID '): ' 0 ';    Include_once (' includes/cls_json.php ');    $json = new json;    $result   = Array (' ERROR ' = 0, ' content ' = ', ' type ' = ' = ' $rec _type, ' cat_id ' + $cat _id);    $children = Get_children ($cat _id);    $smarty->assign ($rec _array[$rec _type]. ' _goods ',      get_category_recommend_goods ($rec _array[$rec _type], $children));    Recommended Products    $smarty->assign (' cat_rec_sign ', 1);    $result [' content '] = $smarty->fetch (' Library/recommend_ '. $rec _array[$rec _type]. '. LBi ');    Die ($json->encode ($result));}

Reply to discussion (solution)

Strictly speaking, this decision is to detect whether a GET request is being requested. is to get the get parameters and then judge what is not understood.

I don't know where you are, or you're not sure. This is a simple HTTP GET access output corresponding data based on the information obtained.

To determine if there is a GET request, and get the act value in the request parameter, it is not always possible for the AJAX call to   be a normal browser call $act =!empty ($_get[' act '])? $_get[' act ']: ";// If the GET request parameter Act is CAT_REC, execute the IF code, if not equal, omit if ($act = = ' Cat_rec ') {    $rec _array = Array (1 = ' best ', 2 = ' new ', 3 =& Gt ' hot ');    $rec _type =!empty ($_request[' Rec_type ')? Intval ($_request[' Rec_type '): ' 1 ';    $cat _id =!empty ($_request[' cid ")? Intval ($_request[' CID '): ' 0 ';    Include_once (' includes/cls_json.php ');    $json = new json;    $result   = Array (' ERROR ' = 0, ' content ' = ', ' type ' = ' = ' $rec _type, ' cat_id ' + $cat _id);     $children = Get_children ($cat _id);    $smarty->assign ($rec _array[$rec _type]. ' _goods ',      get_category_recommend_goods ($rec _array[$rec _type], $children));    Recommended Products    $smarty->assign (' cat_rec_sign ', 1);    $result [' content '] = $smarty->fetch (' Library/recommend_ '. $rec _array[$rec _type]. '. LBi ');    Die ($json->encode ($result));}

You hurt my heart ah, in fact, I understand, but, you are wrong, dare me to say the answer, probably a lot of people will say, this still use to say, certainly ha, this is human! So I won't tell you the answer.

