Multi dimensional php array not working - php

Question

Hi I'm trying to create a multi dimensional array but having problems. I have a multi dimensional array that I'm trying to push other arrays onto. The arrays are created and pushed within an array.
$initialChild = $selectorDetailsArray[0];
$selectorDetailsMultiDimArray = array();
$multiDimHoldArray = array();
for($r=0;$r<count($selectorDetailsArray);$r+=3){
echo "Test vars are ".$selectorDetailsArray[$r]." : ".$initialChild."<br> ";
if(intval($selectorDetailsArray[$r]) == intval($initialChild)){
echo"<br> r is ".$r."<br>";
array_push($multiDimHoldArray,$selectorDetailsArray[$r+1],$selectorDetailsArray[$r+2]);
echo"<br> values are ".$selectorDetailsArray[$r+1]." ".$selectorDetailsArray[$r+2]."<br>";
print "<pre>";
print_r($multiDimHoldArray);
print "</pre>";
}else{
array_push($selectorDetailsMultiDimArray,$multiDimHoldArray);
$multiDimHoldArray = array();
echo "initial child is ".$initialChild."<br>";
$initialChild = $selectorDetailsArray[$r];
echo "initial child after change is ".$initialChild."<br>";
}
}
print "<pre>";
print_r($selectorDetailsMultiDimArray);
print "</pre>";
exit;
output is like this
Array
(
[0] => 65
[1] => 1
[2] => 0
[3] => 65
[4] => 29
[5] => 64
[6] => 66
[7] => 1
[8] => 69
[9] => 66
[10] => 29
[11] => 65
)
Test vars are 65 : 65
r is 0
values are 1 0
Array
(
[0] => 1
[1] => 0
)
Test vars are 65 : 65
r is 3
values are 29 64
Array
(
[0] => 1
[1] => 0
[2] => 29
[3] => 64
)
Test vars are 66 : 65
initial child is 65
initial child after change is 66
Test vars are 66 : 66
r is 9
values are 29 65
Array
(
[0] => 29
[1] => 65
)
Array
(
[0] => Array
(
[0] => 1
[1] => 0
[2] => 29
[3] => 64
)
)
I can't get it to push the second array - I must be missing something?
I've tried everything I can think of but can't figure out why the second array (that's been created) isn't pushed onto the multi dimensional array.
Any help would be great

Answer 1

Not sure what the overall purpose of the code is for "exactly" but I do understand the results you were trying to get, and I also understand why it was not working. I have commented my code so you should be able to see what it is doing. I created an array in the code to start with, but I presume it would work with whatever array you are getting even though you are not showing how it was generated.
$selectorDetailsArray = Array(65,1,0,65,29,64,66,1,69,66,29,65);
$initialChild = $selectorDetailsArray[0];
$selectorDetailsMultiDimArray = array();
$multiDimHoldArray = array();
$loopstrings = array(" :: 1st loop :: "," :: 2nd loop :: "," :: 3rd loop :: "," :: 4th loop :: ");
$loop = 0;
$dim = 0;
for($r=0;$r<count($selectorDetailsArray);$r+=3){
echo "<br>START".$loopstrings[$loop]."<br>";
echo "Test vars are ".$selectorDetailsArray[$r]." : ".$initialChild."<br> ";
if(intval($selectorDetailsArray[$r]) == intval($initialChild)){
echo"<br> r is ".$r."<br>";
array_push($multiDimHoldArray,$selectorDetailsArray[$r+1],$selectorDetailsArray[$r+2]);
echo"<br> values are ".$selectorDetailsArray[$r+1]." ".$selectorDetailsArray[$r+2]."<br>";
}else{
array_push($selectorDetailsMultiDimArray,$multiDimHoldArray);
$multiDimHoldArray = array();
// This needs to be here because the "if" is not run during this loop...
array_push($multiDimHoldArray,$selectorDetailsArray[$r+1],$selectorDetailsArray[$r+2]);
echo "initial child is ".$initialChild."<br>";
$initialChild = $selectorDetailsArray[$r];
echo "initial child after change is ".$initialChild." -- ($ r = $r)<br>";
}
echo "<br>END".$loopstrings[$loop++]."<br>";
}
// We push one last time since it successfully pushed twice more in the "if" but never ran the "else" a final time...
array_push($selectorDetailsMultiDimArray,$multiDimHoldArray);
echo "<br>";
echo "<br>BEGIN OUTPUT<br>";
print "<pre>";
print_r($selectorDetailsArray);
print_r($multiDimHoldArray);
print_r($selectorDetailsMultiDimArray);
print "</pre>";
This is the output that my code generates. I have added a few lines to make it readable, and also output all of the arrays at the end:
START :: 1st loop ::
Test vars are 65 : 65
r is 0
values are 1 0
END :: 1st loop ::
START :: 2nd loop ::
Test vars are 65 : 65
r is 3
values are 29 64
END :: 2nd loop ::
START :: 3rd loop ::
Test vars are 66 : 65
initial child is 65
initial child after change is 66 -- ($ r = 6)
END :: 3rd loop ::
START :: 4th loop ::
Test vars are 66 : 66
r is 9
values are 29 65
END :: 4th loop ::
BEGIN OUTPUT
Array
(
[0] => 65
[1] => 1
[2] => 0
[3] => 65
[4] => 29
[5] => 64
[6] => 66
[7] => 1
[8] => 69
[9] => 66
[10] => 29
[11] => 65
)
Array
(
[0] => 1
[1] => 69
[2] => 29
[3] => 65
)
Array
(
[0] => Array
(
[0] => 1
[1] => 0
[2] => 29
[3] => 64
)
[1] => Array
(
[0] => 1
[1] => 69
[2] => 29
[3] => 65
)
)