Multi-dimentional Array php condition loop and variable assignment - php

Question

Need some help figuring this out. I have a JSON array going to a php file after the submit is clicked via ajax. Once decoded on the php side, it looks like this:
Array
[0] => Array
(
[ID] => 409
[ChangeType] => CHANGE_SEAT_TO
[Name] => John Doe
[Seat] =>
[setTo] => 4-2
[PreviousSeatValue] =>
[PreviousSeatNewValue] => Y
)
[1] => Array
(
[ID] => 278
[ChangeType] => CHANGE_SEAT_TO
[Name] => John Test
[Seat] => 4-1
[setTo] => 4-3
[PreviousSeatValue] => Y
[PreviousSeatNewValue] => Y
)
[2] => Array
(
[ID] => 305
[ChangeType] => REMOVESEAT
[Name] => John Blue
[Seat] => 3-6
[setTo] => 0
)
[3] => Array
(
[ID] => 314
[ChangeType] => CHANGE_SEAT_TO
[Name] => John Red
[Seat] => 3-4
[setTo] => 3-6
[PreviousSeatValue] => Y
[PreviousSeatNewValue] => Y
)
Main Goal:
What im trying to do is loop through all the arrays and if changetype matches a string("CHANGE_SEAT_TO" or "REMOVESEAT"), execute a SQL statement. Im having issues assigning variables to the different key values in the matching arrays during a loop. Here is what I have so far:
$obj = json_decode($_POST['myData'], TRUE);
foreach ($obj as $innerArray){
foreach($innerArray as $key => $value){
$$key = $value;
if($value === "CHANGE_SEAT_TO"){
echo $ID;
echo $setTo;
}
if($value === "REMOVESEAT"){
echo $ID;
echo $setTo;
}
}
}
Now obviously this is set up for just testing purposes(i have the echo's displaying in the console log after successful ajax). With this setup, I am able to successfully echo out the ID of the matching elements but if I try any other one, the variable is undefined. Can anyone explain why this is happening and offer up a suggestion to the main goal? Thanks in advance.

Answer 1

You need only one foreach(), check the modified code
<?php
$obj = json_decode($_POST['myData'], TRUE);
foreach ($obj as $innerArray){
if($innerArray['ChangeType'] == 'CHANGE_SEAT_TO') {
// do stuff
$id = $innerArray['ID'];
// get rest of values in same way
} else if($innerArray['ChangeType'] == 'REMOVESEAT') {
// do stuff
$id = $innerArray['ID'];
// get rest of values in same way
}
}

Answer 2

Try something like this:
foreach ($obj as $value) {
if ($value['ChangeType'] == 'CHANGE_SEAT_TO') {
echo $value['ID'];
echo $value['setTo'];
} elseif ($value['ChangeType'] == 'REMOVESEAT') {
echo $value['ID'];
echo $value['setTo'];
}
}