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    <p>The order of columns is dictated by the order of the select query. </p> <pre><code>SELECT tRelations.ID,tRelations.DATA_RECORD_UUID,tRelations.RECEIVER_ID, tRelations.IS_TEST,tRelations.STATE,tRelations.UNIQUE_ID,tRelations.LAST_MODIFIED, tRelations.CREATED FROM tRelations </code></pre> <p>It says: ID, DATA_RECORD_UUID, RECEIVER_ID, IS_TEST, STATE, UNIQUE_ID and it will be also added in that way to the array. You can reorder it to </p> <pre><code>SELECT tRelations.STATE,tRelations.RECEIVER_ID,tRelations.LAST_MODIFIED, tRelations.CREATED,tRelations.UNIQUE_ID,tRelations.DATA_RECORD_UUID,tRelations.ID, tRelations.IS_TEST FROM tRelations </code></pre> <p>But it will be hard to get the other fields in that order. You you'll probably have to fill them yourself unless you can use aliases like <code>tRelation.SOME_FIELD as '2'</code>.</p> <pre><code>public function getRowArray($mysql_query_result){ $order=array("STATE", "RECEIVER_ID", "LAST_MODIFIED", "CREATED", "UNIQUE_ID", "3", ....); while($row=mysql_fetch_array($mysql_query_result)){ $newRow = array(); foreach($order as $value) { $newRow[$value] = $row[$value]; } $result[]=$newRow; } return $result; } </code></pre> <p>This will actually loop row by row and order it in your desired column order.</p> <p>On a side note: </p> <p>Your code is pretty dangerous and vulnerable for SQL Injections. You shall never directly put the content of a variable inside a SQL query! </p> <pre><code>$user_id = "Somestring with spaces"; $last_sync = "2013-08-07 15:51:25"; $ary=mysql_query("SELECT tRelations.ID,tRelations.DATA_RECORD_UUID,tRelations.RECEIVER_ID, tRelations.IS_TEST,tRelations.STATE,tRelations.UNIQUE_ID,tRelations.LAST_MODIFIED, tRelations.CREATED FROM tRelations JOIN tUserData ON (tUserData.UNIQUE_ID=tRelations.DATA_RECORD_UUID) JOIN tUsers ON (tUsers.ID=tUserData.USER_ID) WHERE tUsers.ID=$user_id AND tRelations.last_modified&gt;'$last_sync' ORDER BY tRelations.ID ASC;") or die(mysql_error()); </code></pre> <p>This would result in a query of </p> <pre><code>SELECT tRelations.ID,tRelations.DATA_RECORD_UUID,tRelations.RECEIVER_ID, tRelations.IS_TEST,tRelations.STATE,tRelations.UNIQUE_ID,tRelations.LAST_MODIFIED, tRelations.CREATED FROM tRelations JOIN tUserData ON (tUserData.UNIQUE_ID=tRelations.DATA_RECORD_UUID) JOIN tUsers ON (tUsers.ID=tUserData.USER_ID) WHERE tUsers.ID=Somestring with spaces AND tRelations.last_modified&gt;'2013-08-07 15:51:25' ORDER BY tRelations.ID ASC;" </code></pre> <p>You see the flaw? That's because "$user_id" wasn't escaped. You should <strong>always</strong> use <a href="http://php.net/manual/en/function.mysql-escape-string.php" rel="nofollow">mysqli_escape_string</a> to escape your string. For example: </p> <pre><code>$ary=mysql_query("SELECT tRelations.ID,tRelations.DATA_RECORD_UUID,tRelations.RECEIVER_ID, tRelations.IS_TEST,tRelations.STATE,tRelations.UNIQUE_ID,tRelations.LAST_MODIFIED, tRelations.CREATED FROM tRelations JOIN tUserData ON (tUserData.UNIQUE_ID=tRelations.DATA_RECORD_UUID) JOIN tUsers ON (tUsers.ID=tUserData.USER_ID) WHERE tUsers.ID=".mysqli_escape_string($user_id)." AND tRelations.last_modified&gt;'".mysqli_escape_string($last_sync)."' ORDER BY tRelations.ID ASC;") or die(mysql_error()); </code></pre> <p>Or even better: Use PDO (PHP Data Objects) when interacting with database. PDO is supported since PHP 5.1 and allows safe interaction with the database. It requires a little bit more code, but significantly improves the readability and security of your PHP application. </p>
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    1. POPHP not writing all keys to array from MySQL Query
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    1. COI have already used escape_string on the input variables, so I don't think that this answers my question. But thanks.
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    2. COThanks for the edit. The order that the fields are appearing in the JSON object is not intentional, and is part of the problem. I want it to appear in the order that I have it in the query in my OP, i.e. beginning with ID, not State. I can't see why it isn't.
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    3. COUsually you should have too worry about the order in JSON, since unlike XML for JSON there are no schemes. When converted to an object or array it's accessed by name not by order. But `json_encode` does it in the order in which the key value pairs were added. `$json["first"] = 1; $json["second"] = 2; json_encode($json);` results in `{ "first" : 1, "second" : 2 }`. It's probably the way mysql adds the fields to the column table internally when generating the row
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