PHP - Loop Question

Hi i am in a situation where i need to use two tables. please look at my code


$result= $db->dbrun('select * from table_user');
while($row = mysql_fetch_array($result)): 
echo $row['username'] . '<br />';
endwhile;

now my problem is i wants to get something from other table where user id match with $row['id'],


$result= $db->dbrun('select * from table_user');
while($row = mysql_fetch_array($result)): 
$query= $db->dbrun('select id from table_other where user_id =$row['id']');
while($user_row = mysql_fetch_array($query)): 
echo $row['username'] . ' - ' . $user_row['id'] . '<br />';
endwhile;
endwhile;


so my main question is is it ok to run $query within  a while loop because i cant run this query without $row['id'] which i gets after loop started or is there any other good way.

Thanks for answering.

Hi guys.  I am new here but have been following the board for about a month.  I will try to contribute as much as possible.  I was given a problem, and need some help out with it.  Most of you will probably find it pretty simple.

Here is what I have:

?>
//Rewrite the while loop using a for loop.

for
        echo "8 times $num is: " . ($num*. "<br/>"
}

/* For the output I need:
8 times 1 is:8
8 times 2 is:16
8 times 3 is: 24
8 times 4 is:32
8 times 5 is:40
8 times 6 is: 48
8 times 7 is: 56
8 times 8 is:64
8 times 9 is: 72
8 times 10 is: 80
*/
?>

So basically I need to fill in that missing code(rewrite the while loop using a for loop)

Thank you so much in advance!

I have a script that displays a certain result set, the row I am concerned about is called 'endonum'. Some rows will have the same number in this field. Is there a way to only show 1 result with the same number in this field. The array will be like '1, 2, 3, 3, 4, 4, 4, 4, 5, 5, 5' and so on, but I just want to display 1 of them, not all. Kinda confusing but maybe someone gets it. Here is the code.
<?php
$selectendo = mysql_query("SELECT * FROM endorse WHERE agency = '$agency' AND finalized = 'No'")or die(mysql_error());
while($showendo = mysql_fetch_array($selectendo))
{
    $endonumber = $showendo['endonum'];
?>
<li><a href="viewendo.php?endonum=<?php echo $endonumber;?>">Endorsement Number:<?php echo $endonumber . " Date: " . $showendo['date'];?></a></li>  
<?php   
}
?>

Ok guys and gals I'm gettin' old! I know this is simple but I've spent way too much time on this now and am crying 'uncle'!

I'm trying load a multi-dementional array with mysql_fetch_array results but I'm not getting it. Here's the rough basis for what I'm trying to do:

$result = mysql_query("SELECT * FROM phpbb_profile_fields_data");
$row = mysql_fetch_array($result) or die(mysql_error());

$some_array = array(
    array(
        'member_name'  => $row['pf_firstname'] . " " . $row['pf_lastname'],
        'member_title' => $row['pf_title'],
        'member_employer' => $row['pf_employer'],
    ),
    array(
        'member_name'       => 'Janet',
        'member_title' => '47',
        'member_employer' => 'Husband',
        ),
);

Okay, so that loads two $some_array elements with data. The first element has the first row of the database in question. Works fine but useless.

So, with a "while ($row = mysql_fetch_array($result) )" what do I need to do to fill the $some_array with the query results?

Thanks!

Due to my home brewed templating system I must use 'return' instead of 'echo' or 'print'.  I have a simple database query and running a while loop where all rows are to "printed" to the browser.  But when I use return only the first row is shown.

Using echo will print out all of the rows as it should but of course it prints the rows outside of where they should in the template.

This may be very simple but I am just starting out.  I tried to use the forum's search to see if this has been answered but the daemon could not 'be reached' and searching on google brings up a ton of non-helpful links.  The solution will be very helpful as I will be doing this A LOT in my scripts for my current project.

Thank you!

Hello Guys,

I have a question. 

I have the following code to grab all of my $_POST vars and run through my filter function

Code: [Select]
foreach($_POST as $key => $value) {
    $mydata[$key] = filter($value);
     }

Before using the foreach loop I was just doing the basic

$var1 = $_POST['var1'];
$var2 = $_POST['var2'];

I'm going to have about 40 - 50 $_POST vars so my question is how do i return it as just a $var name instead of having to do this

 echo "<br><br><br>example1" . $mydata['var1'];
 echo "<br><br><br>example2" . $mydata['var2'];

I guess its hard for me to explain..

Thanks for your help!

This is more of a technical question that i could not find the answer to pn the php.net manual pages.

take the folowing example code:



foreach ($array as $key => $value){

$tempvariable = some_property_of($value);

}

unset($tempvariable);


is that unset statement needed?  Does PHP automatically destroy the variables once the foreach loop is left?

Hey.   So the issue I'm having is consecutive loops on semi-large arrays, over and over. Consider this array:

$firstArray = array(
'row1' => array(
'dates' => array(
'2014-01-01' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
'2014-01-02' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
'2014-01-03' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
'2014-01-04' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
'2014-01-05' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
'2014-01-06' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
'2014-01-07' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
)
),
'row2' => array(
'dates' => array(
'2014-02-01' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
'2014-02-02' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
'2014-02-03' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
'2014-02-04' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
'2014-02-05' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
'2014-02-06' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
'2014-02-07' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
'2014-02-08' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
'2014-02-09' => array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3', 'key4' => 'value4', 'key5' => 'value5', 'key6' => 'value6', 'key7' => 'value7', 'key8' => 'value8', 'key9' => 'value9', 'key10' => 'value10'),
)
)
);

Originally the data comes from ~2-3 database tables, of course. But to ilustrate the point, this is how the main array looks like. This array usually contains anywhere between 10-50 rows, each row containing at least 10 dates, with 10 key/values each.   And after setting up all the data, it needs to be processed. Currently this is how a friend of mine did it..

$placeDataHere = array();
foreach($firstArray as $key => $dates) {
foreach($dates as $date => $values) {
foreach($values as $key => $value) {
$placeDataHere['DV_' . $date]['SM_' . $key] = 'KS_' . $value;
//Followed by another ~50-70 lines of processing the 3 loop's data..
...
...
....
....
....
....
....
....
}
}
}

Obviously this isn't good practise, but we can't seem to figure out a better way of doing it, since both the data and the loops are horribly nested.   This loop and setup of $firstArray is run anywhere between 10-20 times/request, due to amount of users we wish to process. So, the result is that this code can take up to over 2-3 minutes to complete, which isn't really optimal performance.   In short my question is, are there any better methods of handling this with the data setup we currently have?

Below is my output on the browser:

    Student: Kevin Smith (u0867587)
    Course: INFO101 - Bsc Information Communication Technology Course Mark 70 Grade
    Year: 3
   
   
    Module: CHI2550 - Modern Database Applications Module Mark: 41 Mark Percentage: 68 Grade: B
   
    Session: AAB Session Mark: 72 Session Weight Contribution 20%
   
    Session: AAE Session Mark: 67 Session Weight Contribution 40%


    Module: CHI2513 - Systems Strategy Module Mark: 31 Mark Percentage: 62 Grade: B
   
    Session: AAD Session Mark: 61 Session Weight Contribution 50%

Now where it says course mark above it says 70. This is incorrect as it should be 65 (The average between the module marks percentage should be 65 in the example above) but for some stange reason I can get the answer 65. I have a variable called $courseMark and that does the calculation. Now if the $courseMark is echo outside the where loop, then it will equal 65 but if it is put in while loop where I want the variable to be displayed, then it adds up to 70. Why does it do this.
   
    Below is the code:

Code: [Select]
    $sessionMark = 0;
    $sessionWeight = 0;
    $courseMark = 0;
   
    $output = "";
   
    $studentId = false;
    $courseId  = false;
    $moduleId  = false;
   
    while ($row = mysql_fetch_array($result))
    {
   
   
    $sessionMark += round($row['Mark'] / 100 * $row['SessionWeight']);
    $sessionWeight  += ($row['SessionWeight']);
        $courseMark = ($sessionMark /  $sessionWeight * 100);
   
          if($studentId != $row['StudentUsername'])
        {
   
            //Student has changed
            $studentId = $row['StudentUsername'];
   
            $output .= "<p><strong>Student:</strong> {$row['StudentForename']} {$row['StudentSurname']} ({$row['StudentUsername']})\n";
   
        }
             
        if($courseId != $row['CourseId'])
        {
   
            //Course has changed
            $courseId = $row['CourseId'];
   
            $output .= "<br><strong>Course:</strong> {$row['CourseId']} - {$row['CourseName']} <strong>Course Mark</strong>" round($courseMark) "<strong>Grade</strong>  <br><strong>Year:</strong> {$row['Year']}</p>\n";
   
        }
   
        if($moduleId != $row['ModuleId'])
        {
   
            //Module has changed
            if(isset($sessionsAry)) //Don't run function for first record
            {
   
                //Get output for last module and sessions
                $output .= outputModule($moduleId, $moduleName, $sessionsAry);
            }
   
            //Reset sessions data array and Set values for new module
   
            $sessionsAry = array();
            $moduleId    = $row['ModuleId'];
            $moduleName  = $row['ModuleName'];
        }
             
        //Add session data to array for current module
             
        $sessionsAry[] = array('SessionId'=>$row['SessionId'], 'Mark'=>$row['Mark'], 'SessionWeight'=>$row['SessionWeight']);
             
    }    //Get output for last module
   
    $output .= outputModule($moduleId, $moduleName, $sessionsAry);
   
    //Display the output
    echo $output;
I think the problem is that it is outputting the answer of the calculation only for the first session mark. How in the while loop can I do it so it doesn't display it for the first mark only but for all the session marks so that it ends up showing the correct answer 65 and not 72?

Hey guys,

Got another question im hoping someone can help me with.

I have a foreach loop (for use in a mysql query):

   foreach ($interests as $interest) {
       $query .= "($id, $interest), ";
   }

problem is i do not want the comma(,) in the last loop.

Is there some kinda of function i can use so it does not insert it on last loop?

Or should i just use a for loop with a nested if loop? something like ;

   for($i=0; $i < count($interests); $i++){
      $query .=
      "($id, '$interests[$i]')";
      if($i + 1 < count($interests)) {
         $query .= ", ";
      }
      }


Cheers guys

I am working to echo the results in a while or for loop... Both of my sample codes work, but the results are wrong!

The while loop ONLY echos a result IF the first record in the postings table matches the id passed (does not display a result unless the first record has a match)

The if loop displays ALL listings with the same name (counts them all) so there are no unique listings!


<?php

$posts_by_city_sql = "SELECT * FROM postings WHERE id='$_GET[id]'";
$posts_by_city_results = (mysqli_query($cxn, $posts_by_city_sql)) or die("Was not able to grab the Postings!");

/* While Loop  */
while($posts_by_city_row = mysqli_fetch_array($posts_by_city_results)) {
echo "<li><a href='posting_details.php?id=$posts_by_city_row[id]'>$posts_by_city_row[title]</a></li>";
}

/* For Loop  */
$posts_by_city_row = mysqli_fetch_array($posts_by_city_results);
 
for ($i=0; $i<sizeof($posts_by_city_row); $i++) {
echo "<li><a href='posting_details.php?id=$posts_by_city_row[id]'>$posts_by_city_row[title]</a></li>";
 }

?>

Results with for loop (there are 7 total unique book names, but it's just counting the first match on id 7 times like below):

AJAX for Beginners
AJAX for Beginners
AJAX for Beginners
AJAX for Beginners
AJAX for Beginners
AJAX for Beginners
AJAX for Beginners
AJAX for Beginners

Good Evening -  I am in the process of trying to call back a list of categories and sub categories using a WHILE LOOP inside of a WHILE LOOP. It works on a different part of the site within the admin panel but not here. Here it only calls one sub category and moves on to the next parent category instead of finishing the loop and pulling all sub categories out...

// CATEGORIES

$query  = "SELECT * FROM cat";
$result = mysql_query($query);



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

$catid = $row['id'];
$catname = $row['name'];

$output .= "<li class=\"level0 nav-2 parent\" onmouseover=\"toggleMenu(this,1)\" onmouseout=\"toggleMenu(this,0)\">
<a href=\"product.php?cat=$catid\">
<span>$catname</span>
</a>\n";


$querynav = "SELECT * FROM subcat WHERE pid = '$catid'";
$resultnav = mysql_query($querynav);

while($array = mysql_fetch_array($resultnav, MYSQL_ASSOC))
{

$subcatid = $row['id'];
$subcatname = $row['name'];

$output .= "<ul class=\"level0\">
<li class=\"level1 nav-2-1 first\">
<a href=\"product.php?cat=$catid&subid=$subcatid\">
<span>$subcatname</span>
</a>
</li>
</ul>
</li>";
}

}

I'm having a really bad brain fart and I cannot get the logic correct here lol.

I need divs wrapped around every set of 5 images so if there is a total of 8 images then there would be 2 sets of divs (first with 5 images, second with 3 images) and if there was 12 images then there would be 3 sets of divs (first two with five images, last one with 2 images) etc etc What am I doing wrong and is there an easier way to do this?

http://pastebin.com/QfsFxe4G


Thanks!

A WHILE loop in a FOR loop problem

Script about links and sublinks from 1 table.

In fact 2 questions about that.
1) In the FOR loop I have for example to do the loop 3 times. (needs to find 3 results withing the loop with if and else)
When first time, he's gonna search within the WHILE loop that holds (for example) 10 records of the DB in a variable.
He needs to search for rowid number 5, he found it
He goes out of the WHILE loop and goes searching again but now for rowid number 2
 
Now it seem that the WHILE loop start searching for number 2 but won't start from his first row in the variable (10 rows from the db ).
He start at row number 6 instead of beginning all over again !!!

-> so the order of the numbers of rows MUST be in an ascending order, ortherwise he won't find them all ! But the numbers I have are NOT in an ascending order !!!
Why doesn't the WHILE loop begin again from his row 1 in the variable ?

FOR loop
{
   WHILE loop    {   content here,     break;  }
 }


2) even when I get all the result in an ascending order, he won't go doing a second search but with a different rowid number that he gets from the FOR loop.
It is giving me back indeed the right new rowid number,  but the WHILE loop is doing nothing. 
I have put many echo "..."; and other stuff for checking but can't find the cause !

Here's the code :

Code: [Select]
// $ResultShow = 10 rows from mysql db
if(isset($ResultShow)){

if (mysql_num_rows($ResultShow) >= 1){


//$linksuborder = "2,3,4";
$array1 = explode(",", $linksuborder);
sort($array1);

for ($n = 0;  $n < count($array1);  $n++){ // searchin for the right row id in the variable $ResultShow where we find the numbers for next loop
$r1 = each($array1);

While($Row2 = mysql_fetch_array($ResultShow))  {
 
if($Row2["linkid"] == $r1['value'])  // found it, now look for the numbers that we'll put in an array
{  echo "---here the content---"; 

// linksuborder is where numbers from row id's are stored like  5,2,8
//now put them in an array
$array2 = explode(",", $Row2["linksuborder"]);
        sort($array2);

for ($n2 = 0;  $n2 < count($array2);  $n2++){
$r2 = each($array2);

////// here searching for the sublinks //////
While ($Row3 = mysql_fetch_array($ResultShow))
{
if($Row3["linkid"] == $r2['value']) // search for the right row id within the variable $ResultShow
{
echo "---here the content---";
  break; // found it, so no need to do the rest of the loop
 
} // end if
} //end while
////// end searching for sublinks //////

}  // end for
}  // end if

else
{
echo "--- content here ---"; 
}
 


}  // end while
}  // end for


} //end if
} // end if


Table :

linkid     linksuborder     linktitle
1                  2,3,4   
2                  9,7,8           mainlink1
3                  10               mainlink2
4                                     mainlink3
5
6
7                                      sublink3
8                                      sublink2
9                                      sublink1
10                                    sublink4

-> linksuborder 2,3,4 are the row id's for the mainlink
-> than we put the numbers 9,8,7  (also row id's)  mentioned in row linkid 2  also in a new array
-> now we can search for the sublinks
-> get the details from row linkid 9, than 7, than 8

-> First mainlink is compleet, now go to row linkid 3 to do it all over again for the next mainlink...


RESULTS from an sorted array -> sort($linksuborder);
-------------------------------------------------------------
mainlink1 : sublink1, sublink2, sublink3

mainlink2  : **no result back  but it should *

mainlink 3 : **no result back  but it should *

Hi..
I have while loop inside while loop but I encountered problem in displaying data inside while loop or the second while loop.

here is my code:

Code: [Select]
<?php
  error_reporting(0);
$con = mysql_connect('localhost', 'root','');

if (!$con) {
    echo 'failed';
    die();
}

mysql_select_db("mes", $con);
?>
<script type="text/javascript">
function showDetails(pcode) {
 
 var clickElement = pcode.value;
 var click_id = pcode.id;
               
// var value_ =  document.getElementById(click_id).checked
 //    =  document.getElementById(clickElement).checked;   
 //var Table = (document.getElementsByName('list')[0].value);     
 
 var Table = document.getElementById('kanban_list');

 var rows = Table.rows;   
 
 var strSelect = document.getElementById(click_id).value;
 //alert(strSelect)
 
 for (var i = 0; i < rows.length; i++) {     
      var row = rows[i];     
    //row.style.display = (row.id.substr(0,3) == strSelect) ?      'none'         :          '';   
    //row.style.display = (row.id.substr(0,3) == strSelect) ?
   // row.style.display = 'none';
   // row.style.display = '';
   
    if (row.id.substr(0,3) == strSelect) {
        row.style.display = ((document.getElementById(click_id).checked) == false) ?  'none' : ''
    }
    //(document.getElementById(click_id).checked == false) ?  'none'               : '' : '';   
 
 } 
   
}

</script>
<?php
$sql = "SELECT kc.PCODE, kc.count_wip_chemical_weighing, kc.count_wip_compounding, kc.count_wip_extrusion, 
kc.count_wip_forming, kc.count_wip_deflashing, kc.kanban, kc.virtual, p.max_lot, p.min_lot FROM kanban_checker kc 
JOIN plan p ON kc.PCODE = p.PCODE ORDER BY p.PCODE";    
$result = mysql_query($sql, $con);       
?><label>Display Details:</label><input  onclick='showDetails(this);' id='chkDetail'   type='checkbox' checked='checked' value='wip'/>
<?php
echo "<table id='kanban_list'>";
echo "<tr>
        <th> PCODE </th>
        <th> LOT CODE </th>
        <th> CHEMICAL WEIGHING </th>
        <th> COMPOUNDING </th>
        <th> EXTRUSION </th>
        <th> FORMING </th>
        <th> DEFLASHING </th>
        <th> KANBAN </th>
        <th> VIRTUAL </th>
        <th> MAX LOT </th>
        <th> MIN LOT </th>
     </tr>";
while($row = mysql_fetch_assoc($result)){ 
    echo "<tr>
        <td>$row[PCODE]</td>
        <td>&nbsp;</td>
       <!-- <td>$row[LOT_CODE]</td>   -->
        <td>$row[count_wip_chemical_weighing]</td>
        <td>$row[count_wip_compounding]</td>
        <td>$row[count_wip_extrusion]</td>
        <td>$row[count_wip_forming]</td>
        <td>$row[count_wip_deflashing]</td>
        <td>$row[kanban]</td>
        <td>$row[virtual]</td>
        <td>$row[max_lot]</td>
        <td>$row[min_lot]</td>
        </tr>";     
$sql = "SELECT kd.LOT_CODE, kd.wip_chemicalweighing, kd.wip_compounding, kd.wip_extrusion, kd.wip_forming, kd.wip_deflashing 
FROM kanban_data kd JOIN plan p ON kd.PCODE = p.PCODE ORDER BY p.PCODE "; 
$result_kanban_data = mysql_query($sql, $con);   

while($row_data = mysql_fetch_assoc($result_kanban_data)){    
    echo "<tr id='wip'>
    <td></td>
    <td>&nbsp;$row_data[LOT_CODE]</td>
    <td>&nbsp;$row_data[wip_chemicalweighing]</td>
    <td>&nbsp;$row_data[wip_compounding]</td>
    <td>&nbsp;$row_data[wip_extrusion]</td>
    <td>&nbsp;$row_data[wip_forming]</td>
    <td>&nbsp;$row_data[wip_deflashing]</td>
    </tr>"; 
}       
}
echo "</table>";
     
?>
I attach the image of result from this code

But the output that I want is all LOT_CODE with P35 PCODE will only display below P35
and all LOTCODE with P35M PCODE will only display below P35M.

Thank you

I hope somebody can help me..