獲取數據，如果值設置

Question

我有3個變量墊，跟隨，不僅 一個可以在一個時間值我想要什麼，如果任何變量具有價值應該在味精

此更新是我的邏輯

<?php  
    $mat = $this->input->post('mater_mesaage') ; 
    $folow = $this->input->post('follow_message') ; 
    $not = $this->input->post('not_inst_comment') ;  
    if (isset($mat)){ 
     echo "Mat"; 
     $msg = $mat ; 
    } 
    if (isset($folow)) { 
     echo "folow" ; 
     $msg = $folow ; 
    } 
    if (isset($not)){ 
     echo "not" ; 
     $msg = $not ; 
    } 
    echo $msg ; 
?> 

Answer 1

請在時間=

<?php  
    $mat = $this->input->post('mater_mesaage') ; 
    $folow = $this->input->post('follow_message') ; 
    $not = $this->input->post('not_inst_comment') ;  
    if (isset($mat)){ 
     echo "Mat" ; 
     $msg = $mat ; 
    } 
    if (isset($folow)) { 
     echo "folow" ; 
     $msg = $folow ; 
    } 
    if (isset($not)){ 
     echo "not" ; 
     $msg = $not ; 
    } 
    echo $msg ; 
?> 

Answer 2

一個值替換==所以ü應有權使用elseif所以在這裏你去：

<?php  
    $mat = $this->input->post('mater_mesaage') ; 
    $folow = $this->input->post('follow_message') ; 
    $not = $this->input->post('not_inst_comment') ;  
    if (isset($mat)){ 
     echo "Mat"; 
     $msg == $mat; 
    }elseif (isset($folow)) { 
     echo "folow"; 
     $msg == $folow; 
    }else{ 
     echo "not"; 
     $msg == $not; 
    } 
    echo $msg; 
?> 

Answer 3

<?php  
    $mat = $this->input->post('mater_mesaage'); 
    $folow = $this->input->post('follow_message'); 
    $not = $this->input->post('not_inst_comment');  
    if ($mat != '' || $folow != '' || $not != '') { 
     $msg = ($mat != '') ? $mat : (($folow != '') ? $follow : $not); 
    } 
?>