PHP为什么我的函数返回两次具有不同键的数组的结果？

Question

I've a problem with one of my function in PHP. It returns the result two times with different keys…
I want the result only one time without the number keys.

This query and function returns the following array:

<?php
#The query
$typo = GetRowsParams("SELECT * FROM glyphs WHERE g_OK=1");  

#The function   
function GetRowsParams($requete, $params = array())
{
global $bdd;
$stmt = $bdd->prepare($requete) or die(print_r($req->errorinfo()));;
$stmt->execute($params);
$result = $stmt->fetchAll();
return $result;
}
?>


# The Array
Array (
[0] => Array (
    [g_ID] => 1
    [0] => 1
    [g_name] => zero_Nagar.svg
    [1] => zero_Nagar.svg
    [g_height] => 1174
    [2] => 1174
    [g_width] => 352
    [3] => 352
    [g_tag] => Test
    [4] => Test
    [g_u_ID] => 2
    [5] => 2
    [g_path] => 02uploads/Test/zero_Nagar.svg
    [6] => 02uploads/Test/zero_Nagar.svg
    [g_path_PNG] => 02uploads/Test/zero_Nagar.png
    [7] => 02uploads/Test/zero_Nagar.png
    [g_OK] => 1
    [8] => 1
    )
[1] => Array (
    [g_ID] => 2
    [0] => 2
    [g_name] => A
    Nagar.svg [1] => A
            …
            …

Why each row is displayed twice with a different key? Where is my mistake?

Thank you for your help…

Answer 1

it is because by default php returns an array where all data has a textual AND a numeric index. To keep only the textual index, passe PDO::FETCH_ASSOC in the fechAll function like that : stmt->fetchAll(PDO::FETCH_ASSOC);

Answer 2

Add the argument PDO::FETCH_ASSOC like so:

$result = $stmt->fetchAll(PDO::FETCH_ASSOC);

(You can see the different fetch styles here: http://www.php.net/manual/en/pdostatement.fetch.php )

Answer 3

Read up on the PDOStatement::fetch methods . The first argument is a "fetch style," which defaults to fetching an array that looks like the above. If you just want an array that maps field names to valuse, use:

$result = $bdd.fetchAll(PDO::FETCH_ASSOC);