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[WordPress] Ajax in WordPress: A Series on Protocols
<?php
/**
* This function is purely for demonstration purposes of a blog post. There is lack of
* sanitization, functions that are called that are not referenced, and areas that could
* be refactored.
*
* The point is to be relatively verbose for the sake of showing how multiple protocol
* messages by be returned from a function, namely this one, that is called via Ajax
* in WordPress.
*
* The purpose of the function is to take the data in a CSV file and create users
* based on the information in the file.
*/
public function process_file() {
/* Greater sanitization is needed here, but to keep the example succint,
* I'm omitting it. Don't use this in production.
*
* Note that if no file number is specified in the request, then we return an
* an error code following our protocol.
*/
$file_number = -1;
if ( isset( $_POST['file_number'] ) ) {
$file_number = intval( $_POST['file_number'] );
} else {
echo 'no_file_number:-1';
wp_die();
}
/* Greater sanitization is needed here, but to keep the example succint,
* I'm omitting it. Don't use this in production.
*
* Note that if no file number is specified in the request, then we return an
* an error code following our protocol.
*/
if ( isset( $_POST['csv_file'] ) ) {
$csv_file = $_POST['csv_file'];
} else {
echo "no_file_specified:-1"
wp_die();
}
// Otherwise, at this point, we're good to go so we'll continue.
/* Return the number of users. Assume they have been written to the database
* in the function call below. The function returns a collection of WP_User
* objects.
*/
$users = $this->create_wp_users_from_file( $csv_file );
// Return a protocol-specific response.
$total_users = count( $users );
echo "completed:$total_users";
wp_die();
}
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