| Derek Allard | ee0a7f0 | 2008-05-08 13:59:27 +0000 | [diff] [blame] | 1 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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| 58 | <h1>Common Functions</h1>
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| 59 |
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| 60 | <p>CodeIgniter uses a few functions for its operation that are globally defined, and are available to you at any point. These do not require loading any libraries or helpers.</p>
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| 61 | <h2>is_really_writable('<var>path/to/file</var>')</h2>
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| 62 | <p>is_writable() returns TRUE on Windows servers when you really can't write to the file as the OS reports to PHP as FALSE only if the read-only attribute is marked. This function determines if a file is actually writable by attempting to write to it first. Generally only recommended on platforms where this information may be unreliable.</p>
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| 63 | <code>if (is_really_writable('file.txt'))<br />
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| 64 | {<br />
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| 65 | echo "I could write to this if I wanted to";<br />
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| 66 | }<br />
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| 67 | else<br />
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| 68 | {<br />
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| 69 | echo "File is not writable";<br />
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| 70 | }</code>
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| 71 | <h2>config_item('<var>item_key</var>')</h2>
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| 72 | <p>The <a href="../libraries/config.html">Config library</a> is the preferred way of accessing configuration information, however config_item() can be used to retrieve single keys. See Config library documentation for more information.</p>
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| 73 | <h2>show_error('<var>message</var>'), show_404('<var>page</var>'), log_message('<var>level</var>', '<samp>message</samp>')</h2>
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