将查询结果存储到php数组中以按索引回显结果

Question

I have below code which queries result from 2 Mysql columns. I want to store them in a single array. I went thru many questions and answers and tried a lot and managed below code:

$query10 = $conn->query("SELECT CONCAT(step1, ' ', step2) AS A1 FROM workflow1 where nx_version='NX11IP33'");
$array10 = Array();
while( $row = mysqli_fetch_assoc( $query10)){
    $new_array[] = $row; // Inside while loop
}
print_r($new_array);

Current output:

Array ( [0] => Array ( [A1] => 10 2 ) )

Desired output:

Array ( [0] => 10 [1] => 2 )

Any help.

Answer 1

You specifically CONCAT() both columns to a single in your sql query. And then you ask why they are concatenated instead of being separate?

The answer then obviously is to fetch both columns separately:

<?php
//...
$query = $conn->query("SELECT step1, step2 FROM workflow1 WHERE nx_version='NX11IP33'");
if ($query) {
    $result = [];
    while($row = mysqli_fetch_assoc($query)) {
        $result[] = $row;
    }
    print_r($result);
}

The output of that will be something like this:

Array ( 
    [0] => Array ( 
        [step1] => 10
        [step2] => 2 
    ) 
)

---

If nx_version is a unique key, so if it is guaranteed that you will receive only a single row in the query result, then you can simplify that:

<?php
//...
$query = $conn->query("SELECT step1, step2 FROM workflow1 WHERE nx_version='NX11IP33' LIMIT 1");
if ($query) {
    $result = mysqli_fetch_assoc($query);
    print_r($result);
}

The output of that will be something like this:

Array ( 
    [step1] => 10
    [step2] => 2 
)

---

Finally, if you prefer numeric indexes instead of associative ones (as your desired result in the question suggests), then use mysqli_fetch_row() instead of mysqli_fetch_assoc() .