Upgrading from 3.0.6 to 3.1.0¶

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Before performing an update you should take your site offline by +replacing the index.php file with a static one.

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Step 1: Update your CodeIgniter files¶

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Replace all files and directories in your system/ directory.

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Note

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If you have any custom developed files in these directories, +please make copies of them first.

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Step 2: Check your PHP version¶

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We recommend always running versions that are currently supported, which right now is at least PHP 5.6.

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PHP 5.2.x versions are now officially not supported by CodeIgniter, and while 5.3.7+ +may be at least runnable, we strongly discourage you from using any PHP versions below +the ones listed on the PHP.net Supported Versions +page.

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Step 3: If you’re using the ‘odbc’ database driver, check for usage of Query Builder¶

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Query Builder functionality and escape() can +no longer be used with the ‘odbc’ database driver.

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This is because, due to its nature, the ODBC extension for PHP +does not provide a function that allows to safely escape user-supplied strings for usage +inside an SQL query (which our Query Builder relies on).

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Thus, user inputs MUST be bound, as shown in Running Queries, +under the “Query Bindings” section.

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