Remove Indexes from json_encode output [duplicate] - php

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sql PDO fetchall duplicate object keys?
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I've been searching this site and beating my brains out over trying to print_r a json_encode result without including the indexes. Nothing I've found has helped.
Here's the PHP/MySQL function to get data from the database:
public function listGuestsAll() {
if(is_null($this->pdo)) {
$this->msg = 'Connection Failed!';
return [];
} else {
$pdo = $this->pdo;
$stmt = $pdo->prepare('SELECT user_id, name_first, name_last, email_address, user_role FROM guestList');
$stmt->execute();
$result = $stmt->fetchAll();
return $result;
}
}
...and here's the print_r code:
print_r(json_encode($user->listGuestsAll()));
...and here's the output:
[
{
"user_id":"1",
"0":"1",
"name_first":"John",
"1":"John",
"name_last":"Doe",
"2":"Doe",
"email_address":"john#doe.com",
"3":"john#doe.com",
"user_role":"1",
"4":"1"
},
{
"user_id":"2",
"0":"2",
"name_first":"Jane",
"1":"Jane",
"name_last":"Doe",
"2":"Doe",
"email_address":"jane#doe.com",
"3":"jane#doe.com",
"user_role":"1",
"4":"1"
}]
How do I get it to output without the repeating field indexed as 0:1, 1:John, 2:Doe, 3:john#doe, 4:1, etc?
Thanks in advance!

Answer 1

You're using this to fetch the rows:
$result = $stmt->fetchAll();
The documentation says that the default fetch mode is PDO::FETCH_BOTH which means the result is returned with both column names as keys and numeric keys.
You can specify a fetch mode. To fetch the row only indexed by numeric keys, use:
$result = $stmt->fetchAll(PDO::FETCH_NUM);
To fetch the row only indexed by column names, use:
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
You can also change the default globally so it affects all your fetches when you don't specify a fetch mode:
$this->pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_NUM);
You should read:
https://www.php.net/manual/en/pdostatement.fetch.php
https://www.php.net/manual/en/pdostatement.fetchall.php
https://www.php.net/manual/en/pdo.setattribute.php