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Building XML with PHP and MySQL

Posted on 2009-04-02
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Last Modified: 2013-12-12
I'm in an utter mind-melt and having started covering the same ground of problems I'm hoping you guys (from whom I've already learnt a lot) can help me.

I'm trying to get a PHP to build a section of XML from a MySQL table.

The end-result should look something like this:-

---------------------------------------------------------------------------------------------------
Code:
   <Monkey_Muffin>
      <R0>
         <C0>
             <section width="200" height="75" lineThickness="0" lineColour="0x333333"/>
            <text>
               <txt1 />
               <txt2 text="Monkeys" y="2" font="Myriad Pro" fontSize="12" fontColour="0xFFFFFF" align="left" />
               <txt3 text="I like them" y="15" />
            </text>
            <image>
            </image>
         </C0>
         <C1>
            <section width="75" height="75" lineThickness="0" lineColour="0x333333" lineAlpha="100" />
            <text>
            </text>
            <image src="Monkey_Muffin.jpg" fit="false" width="70" height="70" x="2.5" y="2.5" alpha="100" />
         </C1>  
      </R0>
   </Monkey_Muffin>
---------------------------------------------------------------------------------------------------

The table in the MySQL DB contains:-
---------------------------------------------------------------------------------------------------
Code:
Field   Type   Null   Default
name   varchar(20)   Yes  
id   int(11)   Yes  
row   int(11)   Yes  
section   int(11)   Yes  
width   int(255)   Yes  
height   int(255)   Yes  
lineThickness   int(255)   Yes  
lineColour   varchar(255)   Yes  
lineAlpha   int(255)   Yes  
---------------------------------------------------------------------------------------------------

and a few other bits and pieces...

Baring in mind that there could be multiple rows and multiple sections/columns within rows

What I'm trying to get the PHP to do is start

    * ID1 - print the name
    * In ID 1 - where row 1 (in XML terms here, not SQL), print all buttons rows (in SQL terms here)
    * then move onto row 2 until no further rows
    * then repeat process for next ID


In the format outlined above. I have got this working for simpler examples, and I'm thus trying to use code from those... but it's much more complicated. I'm currently trying:-

Code:
---------------------------------------------------------------------------------------------------
<?php
&#160; &#160; &#160; &#160; $dbh = mysql_connect("xxx", "xxx", "xxx");
&#160; &#160; &#160; &#160; mysql_select_db("xxx");

&#160; &#160; &#160; &#160; $query = "SELECT * FROM table WHERE id = 1"; // get cycle up on this
     
&#160; &#160; &#160; &#160; $result = mysql_query($query, $dbh);

&#160; &#160; &#160; &#160; $fields = mysql_num_fields($result);

      echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";

         while ($row=mysql_fetch_array($result)) {
               for ($i=0; $i<$fields; $i++) {
                     $name=mysql_field_name($result, $i);  
                           if ($row['id']= 1) { // get this number to come from earlier variable
                              if ($row['row']= 1) {   // get this number to cycle upwards until done                          
                                 if ($row['section']= 1) {
                                 echo  "<$name=\"$row[$name]\" />\n"; }
                                 else { echo "can put a stop on this for end of row"; }
                              }
                              else { echo "row not 0"; }
                           }
                           else {
                              echo "not showing";
                           }

               }
               echo "/>\n<";
         }


?>
---------------------------------------------------------------------------------------------------

Admittedly with hard-coded ID etc. atm just to see if I can get it working. I can get bits working with bits of info, but I think I'm on completely the wrong road.

Any directional help would be really great.
0
Comment
Question by:mediadonkey
3 Comments
 
LVL 12

Expert Comment

by:adrian_brooks
ID: 24055956
Have you considered the option of having MySQL itself export your data as XML?

A good example of this would be this mysql command line;

./mysql -ujon test --xml -e 'SELECT * FROM t1' > t1.xml

What this will do is take the result of the SELECT query and route the results to a file called t1.xml

Hope this offered some help. :)

~A~
0
 
LVL 1

Accepted Solution

by:
tyfius earned 500 total points
ID: 24084692
You can also use the built-in SimpleXML functionality to create this. It will take all the required nested creation out of your hands.

I added a small snippet which should get you started. It's basically just the correct creation of the array you should worry about.
<?php
function toxml($data, $root = 'data', $xml = NULL) {
  // Turn off compatibility mode as SimpleXML throws a wobbly if you don't.
  if (ini_get('zend.ze1_compatibility_mode') == 1) {
    ini_set('zend.ze2_compatibility_mode', 0);
  }
 
  if ($xml == NULL) {
    $xml = simplexml_load_string('<?xml version="1.0" encoding="UTF-8"?><'. $root .' />');
    $xml->addAttribute('xmlns', 'http://www.example.com/xmlns');
  }
 
  ksort($data);
 
  foreach ($data as $key => $value) {
    // No numeric keys in our XML please!
    if (is_numeric($key)) {
      $key = 'unknownNode_'. (string)$key;
    }
 
    // Replace any non alpha numeric character.
    $key = preg_replace('/[^a-z]/i', '', $key);
 
    if (is_array($value)) {
      $node = $xml->addChild($key);
      toxml($value, $root, $node);
    }
    else {
      if (!empty($value)) {
        $xml->addChild($key, $value);
      }
    }
  }
 
  return $xml->asXML();
}
 
function foo() {
  $result = mysql_query("");
  $rows = array();
  while ($row = mysql_fetch_assoc($result)) {
    $rows[] = $row;
  }
  
  // Return XML content
  return toxml($rows, 'root');
}

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Author Closing Comment

by:mediadonkey
ID: 31565706
Fixed another way, but this will equally work.
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