cannot get array_multisort to work

viveleroi0

I have been searching the net and php documentation but I cannot figure this out.

I have an array:

Array
(
    [0] => Array
        (
            [0] => 218
            [1] => 3
            [2] => 1
            [3] => 33.33
        )

[1] => Array
    (
        [0] => 253
        [1] => 1
        [2] => 2
        [3] => 200
    )

[2] => Array
    (
        [0] => 281
        [1] => 4
        [2] => 4
        [3] => 100
    )
)

and code:


array_multisort($resultArray[3], SORT_NUMERIC, SORT_DESC);

foreach($resultArray as $value){
	echo"<tr>";
	foreach($value as $key => $value2){
		echo"
			<td class=\"datachartRESULT\" align=\"center\">
				<span class=\"datachartRESULTTEXT\">
					$value2
				</span>
			</td>";
	}
	echo"</tr>";
}

I want to sort the array by the fourth item in each subarray in descending order. How do I do this? Nothing I have tried in the last hour has worked.

sidney

//creat array of key 3 to sort by
foreach($resultArray as $val)
	$sortArray[]=$val[3];
array_multisort($sortArray, SORT_NUMERIC, SORT_DESC, $resultArray); 
//unset sort arry as not need any more
unset($sortArray);

foreach($resultArray as $value){ 
    echo"<tr>"; 
    foreach($value as $key => $value2){ 
        echo" 
            <td class=\"datachartRESULT\" align=\"center\"> 
                <span class=\"datachartRESULTTEXT\"> 
                    $value2 
                </span> 
            </td>"; 
    } 
    echo"</tr>"; 
}

viveleroi0

That does work, but somehow I loose my two middle values.

I get a printout of the first (0) and fourth (3) values of each array... what happened to the two middle values.

sidney

ther must be an error in your code somwhere.

viveleroi0

It displayed all data just fine before I added in the code you made, so either there's something wrong with the code you made, or it conflicts with my foreach loops.

I need to find out what it is, and fix it.

sidney

its the way you have implimented the code i supplied

as the code works just fine in below example

 $resultArray=array 
( 
    0 => array 
        ( 
            0 => 218, 
            1 => 3, 
            2 => 1, 
            3 => 33.33 
        ), 

1 => array 
    ( 
        0 => 253, 
        1 => 1, 
        2 => 2, 
        3 => 200 
    ), 

2 => array 
    ( 
        0 => 281, 
        1 => 4, 
        2 => 4, 
        3 => 100 
    ) 
);

foreach($resultArray as $val)
	$sortArray[]=$val[3];
array_multisort($sortArray, SORT_NUMERIC, SORT_DESC, $resultArray); 

foreach($resultArray as $value){ 
    echo"<table><tr>"; 
    foreach($value as $key => $value2){ 
        echo" 
            <td class=\"datachartRESULT\" align=\"center\"> 
                <span class=\"datachartRESULTTEXT\"> 
                    $value2 
                </span> 
            </td>"; 
    } 
    echo"</tr></table>"; 
}

viveleroi0

It was just an issue with the some empty session data - it was my fault.

It works fine now. Thanks.