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php – mysqli fetch_all() not a valid function?

Posted by: admin April 23, 2020 Leave a comment


Thanks to the answers I have figured out that I am unable to use fetch_all() because i am using PHP 5.2.17fetch_assoc with while loop worked.

The function I am using fetch_all is coming back with this error:

Fatal error: Call to undefined method mysqli_result::fetch_all() in

$mysqli = new mysqli($host, $username, $password, $database);
$query = "LONG QUERY that works, tested in phpmyadmin"
$result = $mysqli->query($query);
$result->fetch_all(); or  $mysqli->fetch_all() tried both
mysqli_fetch_all() was already tried.

I am able to connect to the DB and I have pulled single rows. When I place the query in PHPMYADMIN I get 5 rows back.

Does this function even work? Is there a way I can place my data into an assoc array on my own?

How to&Answers:

This function is available since PHP 5.3.0. Possibly your version is older. Use fetch_assoc() instead.

while ($row = $result->fetch_assoc()) {
    // do what you need.


mysqli::fetch_all() needs mysqlnd driver to be installed before you can use it.


The typical way to construct an associative array is in a while loop:

$results_array = array();
$result = $mysqli->query($query);
while ($row = $result->fetch_assoc()) {
  $results_array[] = $row;


Please be careful about using fetch_all():


Read the note about mysqldn requirement.


As an addition to Fabrizios answer, please consider building up your array with a loop:

$array = array();
while($row = $result->fetch_assoc())
    $array[] = $row;


Issue seems to be ‘mysqli’ and ‘mysqlnd’ are not working together. I had the same issue in cpanel


1) Go to CPanel dashboard

2) Go to ‘Select PHP Version’, you should see a bunch of checkboxes

3) Set PHP version (5.4 or above)

4) Uncheck the ‘mysqli’ extension and check both ‘mysqlind’ and ‘nd_mysqli’

Apparently ‘nd_mysqli’ is ‘mysqli’ but configured to work with ‘mysqlind’ and to make it work you have to uncheck ‘mysqli’ due to settings conflicts.

Following answer I found here helped me.


I had 5.6 but didn’t work for me anyway. By enabling the mysqlnd driver it worked for me. Just write apt-get install php5-mysqlnd then restart php and you’re good to go!


If you don’t want to iterate using Karolis‘ answer,

     while($row = mysqli_fetch_array($result,MYSQLI_ASSOC))
       $rows[] = $row;

to achieve the same result as

$rows = mysqli_fetch_all($result, MYSQLI_ASSOC);

You may change constant to MYSQLI_NUM or MYSQLI_BOTH.
This optional parameter are constants indicating what type of array should be produced from the current row data.

Notice that mysqli_fetch_array($result,MYSQLI_ASSOC ) behaves identically to the mysqli_fetch_assoc() function, while mysqli_fetch_array($result,MYSQLI_NUM) will behave identically to the mysqli_fetch_row() function. The final option MYSQLI_BOTH will create a single array with the attributes of both.

Thanks to Your Common Sense for the correction.


PHP Fatal error: Call to undefined function mysqli_fetch_all()

$rows = mysqli_fetch_all($result, MYSQLI_ASSOC);//not work

change to:php 5.3 or

$query = "SELECT * FROM `user_counter` ORDER BY id DESC LIMIT 20";
$result =  mysqli_query($connection, $query) or die
("Error in Selecting " . mysqli_error($connection));
$rows = array();
while ($row = $result->fetch_assoc()) {
    $rows[] = $row;
echo json_encode($rows);


Just to add an additional note about the mysqlnd driver: It also has to have the mysqli API extension installed. Without the extension, fetch_all() still won’t be available. I found this while troubleshooting why my code worked on one server but not another, both PHP > 5.3. Use phpinfo() to verify the installed extensions.


function runQuery($query) {
        $result = mysqli_query($this->conn,$query);
                $resultset  = array(); //you need to define array
                         while($row=$result->fetch_assoc()) {
                              $resultset[] = $row; //then insert result into the array

            return $resultset;}
            else{return 'empty';};