How to use variable as parameter name in PHP SQLite3 bindparam - php

Question

I am using SQLite3 and PHP, and try to write a generic function to execute my queries.
For this I would like to retrieve the name of the parameters from variables in the bindParam.
But it doesn't seem to work. Here is a code showing the unexpected behavior:
<?php
header("Content-Type: text/plain");
$db = new SQLite3(':memory:');
$db->exec("create table mytable (lsid integer primary key autoincrement, usid TEXT, source TEXT)");
$myid = 'agoodid';
$mydatasources = array('home', 'news');
foreach($mydatasources as $datasource) {
$params[] = array(':datasource' => $datasource, ':usid' => $myid);
}
echo "here are the inputs : " .PHP_EOL;
print_r($params);
$querystring = 'insert into mytable (source, usid) values (:datasource, :usid)' ;
echo " I prepare the query '$querystring'" . PHP_EOL;
$query = $db->prepare($querystring);
foreach($params as $set) {
foreach($set as $key => $value) {
echo " Setting $key = $value." . PHP_EOL;
$query->bindParam($key, $value, SQLITE3_TEXT);
}
echo " I execute the query" . PHP_EOL;
$queryres[] = $query->execute();
$query->reset();
}
$results = $db->query('select * from mytable');
echo "and here is what I get : " . PHP_EOL;
while ($row = $results->fetchArray(SQLITE3_ASSOC)) {
print_r($row);
}
?>
And here is the final result :
Array
(
[lsid] => 1
[usid] => agoodid
[source] => agoodid
)
Array
(
[lsid] => 2
[usid] => agoodid
[source] => agoodid
)
All the parameters seem to be bound with the value of the last bound parameter.
The expected result is:
Array
(
[lsid] => 1
[usid] => agoodid
[source] => home
)
Array
(
[lsid] => 2
[usid] => agoodid
[source] => news
)
How to do this? As a reminder: the aim is to not hard code the name of the parameter in bindParam.

Answer 1

I got the binParam function wholy wrong. it is attaching to the given parameter in the sql query a reference to the given variable in php.
I have to use bindValue instead.