How to convert a string into a usable array [duplicate] - php

Question

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Bind multiple parameters into mysqli query
(1 answer)
Closed 9 years ago.
Right now I'm currently attempting to make a MySQLi class to make typing code easier and so it looks cleaner and is more usable overall.
I'm attempting to write a function which will execute a query with a prepared statement. My dilemma is this:
public function safeRead($query, $data, $params)
{
$stmt = $mysqli->prepare($query);
$stmt->bind_param($params, $data);
$stmt->execute();
$result = $stmt->get_result();
$check = $result->fetch_assoc();
}
I of course want to execute a query, as you can see. My problem lies with the $data variable. How can I/is it possible to pass data, as a string and possibly convert to an array or something usable so it can be used with bind_param ?

Answer 1

bind_param prototype looks like this:
bool mysqli_stmt::bind_param ( string $types , mixed &$var1 [, mixed &$... ] )
so it accepts a string of types sssd, and a bunch of variables for those types
Assuming you are passing in the correct type of variables
$stmt->bind_param($params, $data);
A way to do this would be
public function safeRead($query, $data, $params)
{
$stmt = $mysqli->prepare($query);
$params = str_split( $params ); // Split the params 'sssd'
foreach( $data as $k => $v ) {
$stmnt->bind_param( $params[$k], $data[$k] );
}
$stmt->execute();
$result = $stmt->get_result();
$check = $result->fetch_assoc();
}
This is untested.
Edit
Since the second parameter of bind_param is passed by reference you MAY need to create an intermediate variable before binding, instead of binding the array item.
foreach( $data as $k => $v ) {
$var_name = 'var'.$k;
$$var_name = $v;
$stmnt->bind_param( $params[$k], $$var_name );
}
but im not 100% sure.