need to store values from fetched array into new array - php

Question

i have a code like this
$table=table_name;
$sql="SELECT * from $table where student_id='X' and
class='Y' and section='Z'";
$result=$conn->query($sql);
while($row=mysqli_fetch_array($result)
{
$column[]=$row;
}
//printing $columns array
print_r($column);
output
ARRAY ( [0] => ARRAY ( [0] => 1 [SNO] => 1 [1] => 21DBAAACAC0 [STUDENT_ID] => 21DBAAACAC0 [2]
=> WEEKEND [EXAM_NAME] => WEEKEND [3] => 8TH-STANDARD [CLASS] => 8TH-STANDARD [4] =>
A [SECTION] => A [5] => 0 [PERCENTAGE] => 0 [6] => 2021-03-29 [CONDUCTED_DATE]
=> 2021-03-29 [7] => [TELUGU] => [8] => 35 [ENGLISH] => 35 [9] => [MATHEMATICS] => [10] =>
[SOCIAL] => [11] => [HINDI] => [12] => [SCIENCE] => [13] => [NATURAL SCIENCE] => ) )
i need to store column names in to an array like this
column[0]=sno;
column[1]=student_id;
column[2]=exan_name;
column[3]=class; and so on..
ultimately i need column names(of dynamically created table) into an array

Answer 1

use following code to get keys of associative array
<?php
$new = call_user_func_array('array_merge', 'array name here');
for($i=0;$i<sizeof($new)-1;$i++)
{
echo $new[$i]."<br>";
}
?>
it will give output
sno(column 1 name)
student_name(column 2 name)
student_id(column 3 name)...up to size-1

Answer 2

well you can use:
while ($row = $result->fetch_assoc()) {
//code here
}
you'll have an associative array like this:
$row(
"column_key0" => "column_value0",
"column_key1" => "column_value"
//and so on
);
then you can access it with a foreach
foreach ($row as $column_key => $value) {
//code here ($column_key is the name of your column)
};
then you can do what you want like save it in another array checking for duplicates or simply use it for your needs.
This way also if you don't know the table structure you can use column names.
so:
$result_set = $result->fetch_assoc();
foreach ($result_set as $row) { // here you can replace with as $row_number => $row if needed
foreach ($row as $column_key => $column_value){
//code here ($column_key is the name of your column)
}
};
is the final result;