如何在PHP中使用If / else语句来过滤mysql结果

Question

In the beginning, each person have 2 languages of messages ( chimessage & engmessage )saved to the database.

Each of them have selected a preferred language (either chi or eng). In the display page, i'm trying to show each person's message with their preferred language. eg, If person A prefer eng, the page will only show engmessage.

PS the display page will include both engmessage and chimessage for different people

I am wondering how can i do that, im thinking using the if/else statement.

PS I know iam using deprecated mysql,still trying to learn php, plz bear with me

 <?php

 include('connect-db.php');

 $result = mysql_query("SELECT * FROM table
  WHERE language ='Chi' OR language ='Eng'");


 while($row = mysql_fetch_array( $result ,MYSQL_ASSOC)) {

 echo "<tr>";

 echo '<td width="200px">' . $row['people'] . '</td>';
 echo '<td width="200px">' . $row['language'] . '</td>';
 echo '<td>' . $row['chimessage'] ."<br />";
 echo '<td>' . $row['engmessage'] ."<br />";

 }

 echo "</tr>";
 echo "</table>";
 ?>

Expected result

 People      Language       Msg
 A            Chi           物理治療
 B            Eng           Physiotherapy

Answer 1

Change your code like this

 <?php

 include('connect-db.php');

 $result = mysql_query("SELECT * FROM table
  WHERE language ='Chi' OR language ='Eng'");


echo "<table>";

 while($row = mysql_fetch_array( $result ,MYSQL_ASSOC)) {

 echo "<tr>";
 echo '<td width="100px">' . $row['id'] . '</td>';
 echo '<td width="200px">' . $row['people'] . '</td>';

 if($row['language'] == 'Chi')
 {
    echo '<td>' . $row['chimessage'] ."</td>";
 }
 else if($row['language'] == 'Eng')
 {
    echo '<td>' . $row['engmessage'] ."</td>";
 }
 echo "</tr>";

 }


 echo "</table>";
 ?>