Fetch array function doubling values in each position of array?

问题

I am getting strange behaviour from this function.

Input

    public function fetch_array($result_set) 
{
        $rows = array();
        while ($row = mysql_fetch_array($result_set)) 
        {
            $rows[] = $row;
            print_r($row);
            break;
        }
        return $rows;

}

I have made the function run once but it its duplicating a row from my MySQL query result.

Output

Array ( [0] => Sarah [first_name] => Sarah [1] => Palin [second_name] => Palin )

It should be

Correct Output

Array ( [first_name] => Sarah [second_name] => Palin )

I used this SO question example

Use mysql_fetch_array() with foreach() instead of while()

Not my query or Mysql result fault

http://i.imgur.com/CZnIF.png

What is going wrong here?

回答1:

This is not an error, it's the intended behavior of mysql_fetch_array() http://us.php.net/manual/en/function.mysql-fetch-array.php

You can either set the result_type flag, or you can just use mysql_fetch_assoc() instead. http://us.php.net/manual/en/function.mysql-fetch-assoc.php

回答2:

When using mysql_fetch_array, feed it the MYSQL_ASSOC flag.

EDIT: Here's your code, with the appropriate change

while ($row = mysql_fetch_array($result_set, MYSQL_ASSOC))

Also, you can get them with just the numeric indices by feeding it MYSQL_NUM

回答3:

The reason why you get one result and wanting the other is because you are pushing an array($row) inside a new array ($rows). By pushing something in an array(The brackets you use) you get an auto incrementing key with it.

回答4:

try this:

$rows['name'] = $row['name'];
$rows['second_name] = $row['second_name'];

...

instead of

$rows[] = $row;

回答5:

By default mysql_fetch_array has two keys for each database column -- one with the numerical key and one with the associative key. You can do this to tell it only to fetch the numeric keys:

mysql_fetch_array($result, MYSQL_NUM);

http://us2.php.net/manual/en/function.mysql-fetch-array.php

回答6:

It is completely normal and expected behaviour. If you just want the associative array, use

while ($row = mysql_fetch_array($result_set, MYSQL_ASSOC))

来源：https://stackoverflow.com/questions/12921939/fetch-array-function-doubling-values-in-each-position-of-array

标签

php

mysql

arrays

fetch