Store elememts of a datatable into an array - php

Question

I have a database table made in phpmyadmin. I want the elements of the table to be stored row-wise in an array. I have three columns named edge_id, vertexA and VertexB. I want the elements of these three columns to be stored into an array.
I don't know those commands for PHP. Please help me out.

Answer 1

i have columns in my table named
"vertexa" and "vertexb",i want to
store the colums in two separate
arrays ...how can i do it??
The simplest way would be:
$db = new PDO('mysql:host=localhost;dbname=your_db_name;', $user, $password);
$vertices_a = array();
$vertices_b = array();
foreach($db->query('SELECT * from your_table_name') as $row){
$id = $row['edge_id'];
// add them to the proper array using the edge_id as the index -
// this assumes edge_id is unique
$vertices_a[$id] = $row['vertexa'];
$vertices_b[$id] $row['vertexb'];
}
So with PDO:
$db = new PDO('mysql:host=localhost;dbname=your_db_name;', $user, $password);
foreach($db->query('SELECT * from your_table_name') as $row){
echo $row['edge_id'];
echo $row['vertexA'];
echo $row['vertexB'];
}
Now if you need to use input data you need to escape it. The best way to do this is to use a prepared statement because escaping is handle when the parameters are bound to the query.
Lets say for example you want to use the edge_id supplied from a get request like mysite.com/show-boundry.php?edge=5...
$db = new PDO('mysql:host=localhost;dbname=your_db_name;', $user, $password);
// create a prepared statement
$stmt = $db->prepare('SELECT * from your_table_name WHERE edge_id = ?');
// execute the statement binding the edge_id request parameter to the prepared query
$stmt->execute(array($_GET['edge']));
// loop through the results
while(false !== ($row = $stmt->fetch(PDO::FETCH_ASSOC))){
echo $row['edge_id'];
echo $row['vertexA'];
echo $row['vertexB'];
}
Also you shouldnt use mixed case column/table names like vertexA instead use underscore separators like vertex_a.

Answer 2

You first need to connect to the database:
$link = mysql_connect('localhost','username','password');
if (!$link) {
// Cannot connect
}
$ret = mysql_select_db('database-name', $link);
if (!$ret) {
// Cannot select database
}
Then you need to execute your query:
$ret = mysql_query('SELECT * FROM `table`;', $link);
if (!$ret) {
// Query failed
}
Then you simply load each row:
$data = array();
while ($row = mysql_fetch_assoc($ret)) {
$data[] = $row;
}
Then you should free your request results
mysql_free_result($ret);
And voilà.

Answer 3

$res = mysql_query("............");
$row = mysql_fetch_array($res);
Checkout: mysql_fetch_array PHP page