Overview - get* methods
Overview - get* methods – Comparison of get* methods
Описание
This page gives an overview about the methods that allow you to fetch entire result sets without looping over single result rows: getOne(), getRow(), getCol(), getAssoc() and getAll().
Our data source is the following table:
| id | nickname | |
|---|---|---|
| 1 | pinky | pinky@domination.org |
| 2 | thebrain | brain@dominators.net |
A simple var_dump() is used to make clear in which use cases the methods can be used:
<?php
require_once 'DB.php';
$db = DB::connect('mysql://user:pass@localhost/example');
var_dump(
$db->getOne('SELECT nickname, id, email FROM users')
);
?>
getRow
getRow() fetches the first row.
array(3) {
[0] => string(5) "pinky"
[1] => string(1) "1"
[2] => string(20) "pinky@domination.org"
}
getCol
getCol() fetches the first column of all rows.
array(2) {
[0]=> string(5) "pinky"
[1]=> string(8) "thebrain"
}
getAssoc
getAssoc() fetches all rows into an array, using the first colum of the rows as array key. This column is removed from the array itself.
array(2) {
["pinky"] => array(2) {
[0] => string(1) "1"
[1] => string(20) "pinky@domination.org"
}
["thebrain"] => array(2) {
[0] => string(1) "2"
[1] => string(20) "brain@dominators.net"
}
}
getAll
getAll() fetches all columns from all rows into an array.
array(2) {
[0] => array(3) {
[0] => string(5) "pinky"
[1] => string(1) "1"
[2] => string(20) "pinky@domination.org"
}
[1] => array(3) {
[0] => string(8) "thebrain"
[1] => string(1) "2"
[2] => string(20) "brain@dominators.net"
}
}