I have a mysqli resultset with two columns of data and several rows. I want to store each row of the resultset as an indexed subarray in my result array (specifically in $rows['data']).
This is my current code:
$query = mysqli_query($con,"SELECT Energy_UTC,Total_watts FROM combined_readings");
$rows = array();
$rows['name'] = 'Total_watts';
while ($tmp = mysqli_fetch_array($query)) {
$rows['data'][] = $tmp['Energy_UTC'];
$rows['data'][] = $tmp['Total_watts'];
}
This results in an array that looks like this:
{"name":"Total_watts","data":[1519334969,259,1519335149,246,1519335329,589,1519335509,589,1519335689,341,1519335869,341,1519336050,523,1519336230,662,1519336410,662,1519336590,469]}
But I need the result to be an array that looks like this:
{"name":"Total_watts","data":[1519334969,259],[1519335149,246],[1519335329,589],[1519335509,589],[1519335689,341],[1519335869,341],[1519336050,523],[1519336230,662],[1519336410,662],[1519336590,469]}
Can someone suggest a change in the PHP while loop to produce this output?
You just need to adjust your syntax to place the elements in the same subarray.
while($tmp = mysqli_fetch_array($query)) {
$rows['data'][] = [$tmp['Energy_UTC'],$tmp['Total_watts']];
}
p.s. Additionally, you could use mysqli_fetch_assoc() since you are only accessing the associative keys. Or even better, use mysqli_fetch_row() and assign the row to your result array.
All baked, it could look like this:
if(!$result=mysqli_query($con,"SELECT Energy_UTC,Total_watts FROM combined_readings")){
// handle the query error
}else{
$rows=['name'=>'Total_watts'];
while($row=mysqli_fetch_row($result)){
$rows['data'][]=$row; // this will store subarrays like: [1519334969,259]
}
}
Related
I can't seem to find a way to save all rows from odbc_exec to an array. I found php_fetch_array, but that only fetches one row at a time, requiring me to iterate through all rows to put it into an array. Is there a more concise way to do this?
Tried
`
$myArray = array();
while (odbc_fetch_row($result)) {
$myArray[odbc_result($result,1)] = odbc_result($result,2);
}`
and also
`
$myArray = array();
while ($myRow = odbc_fetch_row($result)) {
$myArray[$myRow['id']] = $myRow['name'];
}`
but $myArray is still empty.
What's the best way to output all results from a SELECT query?
if ($result = mysqli_query($con, "SELECT name,pic_url FROM accounts")) {
$data = mysqli_fetch_assoc($result);
var_dump($data);
mysqli_free_result($result);
}
At present dumping of $data only outputs one result, even though a quick check of mysqli_num_rows() shows two results (and there are two rows in the table).
What's the best way to output this data?
I'm essentially looking to output the name field and the pic_url for each row so I was hoping to receive my results as an array which I can then loop through using foreach
you need to use a loop.
while ($data = mysqli_fetch_assoc($result)) {
var_dump($data);
}
Use simple while loop and store in an array:
if ($result = mysqli_query($con, "SELECT name,pic_url FROM accounts"))
{
while ($data[] = mysqli_fetch_assoc($result));
}
I'm a bit new to multidimensional arrays, and would like to see if I'm doing it right. preferably, I'd like to name the arrays within the main array for ease of use.
$unique_array = array(
username=>array(),
user_id=>array(),
weeknumber=>array()
);
and then I have a while loop which checks some database results:
while($row = mysql_fetch_array($query)) //yes, I know mysql is deprecated
{
$unique_array[] = username=>$row['username'], user_id=>$row['user_id'], week number=>['weeknumber'];
}
I'm not sure if I am placing the values in the array from within the while loop correctly, or if it needs to be done some other way. I couldn't find any resources I could easily understand on SO or elsewhere to deal with query results within a named array within a multidimensional array.
EDIT FOLLOW UP QUESTION: I also need to check the array for duplicate values, because there will be multiple values that are exactly the same, but I only want one of them.
Any help is appreciated!
EDIT SOLUTION:
By modifying the answer I was able to create code to fit my needs.
Array initialization:
$unique_array = array(
'username'=>array(),
'user_id'=>array(),
'weeknumber'=>array()
);
Building the array from within a while loop:
while($row = mysql_fetch_array($query))
{
$unique_array[] = array('username'=>$row['username'], 'user_id'=>$row['user_id'], 'weeknumber'=>$row['weeknumber']);
}
And finally, I need to make sure the array values are unique (there are duplicates entries as a result of database and query limitations), after the while loop I have:
print_r(multi_unique($unique_array));
Is the top level an associative array or a numeric array?
If it is an associative array, it should have structure like this:
$unique_array = array(
'username'=>array('John','Mike',...),
'user_id'=>array(1,2,3,...),
'week_number'=>array(1,2,3,...)
);
Or if it is a numeric array, it should have structure like this:
$unique_array = array(
array('username'=>'John', 'user_id'=>1, 'week_number'=>1),
array('username'=>'Mike', 'user_id'=>2, 'week_number'=>2),
array('username'=>'Sam', 'user_id'=>3, 'week_number'=>3),
...
)
for the first type use the code below:
while ($row = mysql_fetch_assoc($query)) {
$unique_array['username'][] = $row['username'],
$unique_array['user_id'][] = $row['user_id'],
$unique_array['week_number'][] = $row['week_number'],
}
for the second type, it is something like your code. But there are some syntax problems:
while($row = mysql_fetch_array($query)) //yes, I know mysql is deprecated
{
$unique_array[] = array('username'=>$row['username'], 'user_id'=>$row['user_id'], 'week_number'=>$row['weeknumber']);
}
How can i get every row of a mysql table and put it in a php array? Do i need a multidimensional array for this? The purpose of all this is to display some points on a google map later on.
You need to get all the data that you want from the table. Something like this would work:
$SQLCommand = "SELECT someFieldName FROM yourTableName";
This line goes into your table and gets the data in 'someFieldName' from your table. You can add more field names where 'someFieldName' if you want to get more than one column.
$result = mysql_query($SQLCommand); // This line executes the MySQL query that you typed above
$yourArray = array(); // make a new array to hold all your data
$index = 0;
while($row = mysql_fetch_assoc($result)){ // loop to store the data in an associative array.
$yourArray[$index] = $row;
$index++;
}
The above loop goes through each row and stores it as an element in the new array you had made. Then you can do whatever you want with that info, like print it out to the screen:
echo $row[theRowYouWant][someFieldName];
So if $theRowYouWant is equal to 4, it would be the data(in this case, 'someFieldName') from the 5th row(remember, rows start at 0!).
$sql = "SELECT field1, field2, field3, .... FROM sometable";
$result = mysql_query($sql) or die(mysql_error());
$array = array();
while($row = mysql_fetch_assoc($result)) {
$array[] = $row;
}
echo $array[1]['field2']; // display field2 value from 2nd row of result set.
The other answers do work - however OP asked for all rows and if ALL fields are wanted as well it would much nicer to leave it generic instead of having to update the php when the database changes
$query="SELECT * FROM table_name";
Also to this point returning the data can be left generic too - I really like the JSON format as it will dynamically update, and can be easily extracted from any source.
while ($row = mysql_fetch_array($result, MYSQL_ASSOC))
{
echo json_encode($row);
}
You can do it without a loop. Just use the fetch_all command
$sql = 'SELECT someFieldName FROM yourTableName';
$result = $db->query($sql);
$allRows = $result->fetch_all();
HERE IS YOUR CODE, USE IT. IT IS TESTED.
$select=" YOUR SQL QUERY GOOES HERE";
$queryResult= mysql_query($select);
//DECLARE YOUR ARRAY WHERE YOU WILL KEEP YOUR RECORD SETS
$data_array=array();
//STORE ALL THE RECORD SETS IN THAT ARRAY
while ($row = mysql_fetch_array($queryResult, MYSQL_ASSOC))
{
array_push($data_array,$row);
}
mysql_free_result($queryResult);
//TEST TO SEE THE RESULT OF THE ARRAY
echo '<pre>';
print_r($data_array);
echo '</pre>';
THANKS
I currently have a database like the picture below.
Where there is a query that selects the rows with number1 equaling 1. When using
mysql_fetch_assoc()
in php I am only given the first is there any way to get the second? Like through a dimesional array like
array['number2'][2]
or something similar
Use repeated calls to mysql_fetch_assoc. It's documented right in the PHP manual.
http://php.net/manual/function.mysql-fetch-assoc.php
// While a row of data exists, put that row in $row as an associative array
// Note: If you're expecting just one row, no need to use a loop
// Note: If you put extract($row); inside the following loop, you'll
// then create $userid, $fullname, and $userstatus
while ($row = mysql_fetch_assoc($result)) {
echo $row["userid"];
echo $row["fullname"];
echo $row["userstatus"];
}
If you need to, you can use this to build up a multidimensional array for consumption in other parts of your script.
$Query="select SubCode,SubLongName from subjects where sem=1";
$Subject=mysqli_query($con,$Query);
$i=-1;
while($row = mysqli_fetch_array($Subject))
{
$i++;
$SubjectCode[$i]['SubCode']=$row['SubCode'];
$SubjectCode[$i]['SubLongName']=$row['SubLongName'];
}
Here the while loop will fetch each row.All the columns of the row will be stored in $row variable(array),but when the next iteration happens it will be lost.So we copy the contents of array $row into a multidimensional array called $SubjectCode.contents of each row will be stored in first index of that array.This can be later reused in our script.
(I 'am new to PHP,so if anybody came across this who knows a better way please mention it along with a comment with my name so that I can learn new.)
This is another easy way
$sql_shakil ="SELECT app_id, doctor_id FROM patients WHERE doctor_id = 201 ORDER BY ABS(app_id) ASC";
if ($result = $con->query($sql_shakil)) {
while ($row = $result->fetch_assoc()) {
printf ("%s (%s)\n", $row["app_id"], $row["doctor_id"]);
}
Demo Link
It looks like the complete solution has not been suggested yet
$Query="select SubCode,SubLongName from subjects where sem=1";
$Subject=mysqli_query($con,$Query);
$Rows = array ();
while($row = mysqli_fetch_array($Subject))
{
$Rows [] = $row;
}
The $Rows [] = $row appends the row to the array. The result is a multidimensional array of all rows.