Forked from terrymun/bettermysql-sanitize-input.php
Last active
August 29, 2015 14:27
-
-
Save krisatkinson/1d571a6d4f61f15353d7 to your computer and use it in GitHub Desktop.
Sanitising user inputs for other variables
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <?php | |
| // Assuming that database connection is already open | |
| // Let's say a user is allowed to provide a table name to query from | |
| $tableName = trim($_GET['tableName']); | |
| // This would NOT work (no good!) | |
| $stmt = $db->prepare("SELECT user, id, email FROM :table WHERE id > 1000"); | |
| $stmt->bindParam(':table', $tableName); | |
| $stmt->execute(); | |
| // More... | |
| // This would work (OSSOM) | |
| // Check user input against a whitelist | |
| $tableNames = array('userdata1', 'userdata2', 'userdata3'); | |
| // If user input matches an entry within the whitelist, go ahead | |
| if(in_array($tableName, $tableNames)) { | |
| $stmt = $db->prepare("SELECT user, id, email FROM `$tableName` WHERE id > 1000"); | |
| $stmt->execute(); | |
| // More... | |
| } else { | |
| // Throw an error | |
| } | |
| ?> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment