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126 lines
4.8 KiB
126 lines
4.8 KiB
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<td><h1>CodeIgniter User Guide Version 2.1.3</h1></td> |
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<a href="http://codeigniter.com/">CodeIgniter Home</a> › |
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<a href="../index.html">User Guide Home</a> › |
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Handling Multiple Environments |
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<h1>Handling Multiple Environments</h1> |
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<p> |
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Developers often desire different system behavior depending on whether |
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an application is running in a development or production |
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environment. For example, verbose error output is something that would |
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be useful while developing an application, but it may also pose a security issue when "live". |
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</p> |
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<h2>The ENVIRONMENT Constant</h2> |
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<p> |
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By default, CodeIgniter comes with the environment constant set to |
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'<kbd>development</kbd>'. At the top of index.php, you will see: |
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<code> |
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define('<var>ENVIRONMENT</var>', '<var>development</var>'); |
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</code> |
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<p> |
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In addition to affecting some basic framework behavior (see the next section), |
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you may use this constant in your own development to differentiate |
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between which environment you are running in. |
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<h2>Effects On Default Framework Behavior</h2> |
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<p> |
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There are some places in the CodeIgniter system where the <kbd>ENVIRONMENT</kbd> |
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constant is used. This section describes how default framework behavior is |
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affected. |
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</p> |
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<h3>Error Reporting</h3> |
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<p> |
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Setting the <kbd>ENVIRONMENT</kbd> constant to a value of '<kbd>development</kbd>' will |
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cause all PHP errors to be rendered to the browser when they occur. Conversely, |
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setting the constant to '<kbd>production</kbd>' will disable all error output. Disabling |
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error reporting in production is a <a href="security.html">good security practice</a>. |
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<h3>Configuration Files</h3> |
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<p> |
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Optionally, you can have CodeIgniter load environment-specific |
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configuration files. This may be useful for managing things like differing API keys |
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across multiple environments. This is described in more detail in the |
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environment section of the <a href="../libraries/config.html#environments">Config Class</a> documentation. |
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