1 <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
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5 * An open source application development framework for PHP 4.3.2 or newer
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7 * @package CodeIgniter
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8 * @author ExpressionEngine Dev Team
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9 * @copyright Copyright (c) 2008, EllisLab, Inc.
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10 * @license http://codeigniter.com/user_guide/license.html
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11 * @link http://codeigniter.com
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12 * @since Version 1.0
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16 // ------------------------------------------------------------------------
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19 * CodeIgniter File Helpers
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21 * @package CodeIgniter
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22 * @subpackage Helpers
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24 * @author ExpressionEngine Dev Team
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25 * @link http://codeigniter.com/user_guide/helpers/file_helper.html
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28 // ------------------------------------------------------------------------
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33 * Opens the file specfied in the path and returns it as a string.
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36 * @param string path to file
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39 if ( ! function_exists('read_file'))
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41 function read_file($file)
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43 if ( ! file_exists($file))
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48 if (function_exists('file_get_contents'))
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50 return file_get_contents($file);
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53 if ( ! $fp = @fopen($file, FOPEN_READ))
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58 flock($fp, LOCK_SH);
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61 if (filesize($file) > 0)
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63 $data =& fread($fp, filesize($file));
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66 flock($fp, LOCK_UN);
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73 // ------------------------------------------------------------------------
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78 * Writes data to the file specified in the path.
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79 * Creates a new file if non-existent.
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82 * @param string path to file
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83 * @param string file data
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86 if ( ! function_exists('write_file'))
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88 function write_file($path, $data, $mode = FOPEN_WRITE_CREATE_DESTRUCTIVE)
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90 if ( ! $fp = @fopen($path, $mode))
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95 flock($fp, LOCK_EX);
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97 flock($fp, LOCK_UN);
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104 // ------------------------------------------------------------------------
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109 * Deletes all files contained in the supplied directory path.
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110 * Files must be writable or owned by the system in order to be deleted.
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111 * If the second parameter is set to TRUE, any directories contained
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112 * within the supplied base directory will be nuked as well.
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115 * @param string path to file
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116 * @param bool whether to delete any directories found in the path
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119 if ( ! function_exists('delete_files'))
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121 function delete_files($path, $del_dir = FALSE, $level = 0)
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123 // Trim the trailing slash
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124 $path = preg_replace("|^(.+?)/*$|", "\\1", $path);
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126 if ( ! $current_dir = @opendir($path))
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129 while(FALSE !== ($filename = @readdir($current_dir)))
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131 if ($filename != "." and $filename != "..")
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133 if (is_dir($path.'/'.$filename))
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135 // Ignore empty folders
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136 if (substr($filename, 0, 1) != '.')
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138 delete_files($path.'/'.$filename, $del_dir, $level + 1);
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143 unlink($path.'/'.$filename);
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147 @closedir($current_dir);
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149 if ($del_dir == TRUE AND $level > 0)
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156 // ------------------------------------------------------------------------
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161 * Reads the specified directory and builds an array containing the filenames.
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162 * Any sub-folders contained within the specified path are read as well.
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165 * @param string path to source
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166 * @param bool whether to include the path as part of the filename
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167 * @param bool internal variable to determine recursion status - do not use in calls
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170 if ( ! function_exists('get_filenames'))
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172 function get_filenames($source_dir, $include_path = FALSE, $_recursion = FALSE)
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174 static $_filedata = array();
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176 if ($fp = @opendir($source_dir))
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178 // reset the array and make sure $source_dir has a trailing slash on the initial call
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179 if ($_recursion === FALSE)
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181 $_filedata = array();
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182 $source_dir = rtrim(realpath($source_dir), DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR;
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185 while (FALSE !== ($file = readdir($fp)))
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187 if (@is_dir($source_dir.$file) && strncmp($file, '.', 1) !== 0)
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189 get_filenames($source_dir.$file.DIRECTORY_SEPARATOR, $include_path, TRUE);
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191 elseif (strncmp($file, '.', 1) !== 0)
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194 $_filedata[] = ($include_path == TRUE) ? $source_dir.$file : $file;
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206 // --------------------------------------------------------------------
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209 * Get Directory File Information
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211 * Reads the specified directory and builds an array containing the filenames,
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212 * filesize, dates, and permissions
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214 * Any sub-folders contained within the specified path are read as well.
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217 * @param string path to source
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218 * @param bool whether to include the path as part of the filename
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219 * @param bool internal variable to determine recursion status - do not use in calls
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222 if ( ! function_exists('get_dir_file_info'))
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224 function get_dir_file_info($source_dir, $include_path = FALSE, $_recursion = FALSE)
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226 $_filedata = array();
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227 $relative_path = $source_dir;
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229 if ($fp = @opendir($source_dir))
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231 // reset the array and make sure $source_dir has a trailing slash on the initial call
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232 if ($_recursion === FALSE)
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234 $_filedata = array();
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235 $source_dir = rtrim(realpath($source_dir), DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR;
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238 while (FALSE !== ($file = readdir($fp)))
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240 if (@is_dir($source_dir.$file) && strncmp($file, '.', 1) !== 0)
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242 get_dir_file_info($source_dir.$file.DIRECTORY_SEPARATOR, $include_path, TRUE);
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244 elseif (strncmp($file, '.', 1) !== 0)
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246 $_filedata[$file] = get_file_info($source_dir.$file);
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247 $_filedata[$file]['relative_path'] = $relative_path;
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259 // --------------------------------------------------------------------
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264 * Given a file and path, returns the name, path, size, date modified
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265 * Second parameter allows you to explicitly declare what information you want returned
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266 * Options are: name, server_path, size, date, readable, writable, executable, fileperms
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267 * Returns FALSE if the file cannot be found.
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270 * @param string path to file
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271 * @param mixed array or comma separated string of information returned
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274 if ( ! function_exists('get_file_info'))
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276 function get_file_info($file, $returned_values = array('name', 'server_path', 'size', 'date'))
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279 if ( ! file_exists($file))
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284 if (is_string($returned_values))
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286 $returned_values = explode(',', $returned_values);
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289 foreach ($returned_values as $key)
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294 $fileinfo['name'] = substr(strrchr($file, '/'), 1);
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296 case 'server_path':
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297 $fileinfo['server_path'] = $file;
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300 $fileinfo['size'] = filesize($file);
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303 $fileinfo['date'] = filectime($file);
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306 $fileinfo['readable'] = is_readable($file);
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309 // There are known problems using is_weritable on IIS. It may not be reliable - consider fileperms()
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310 $fileinfo['writable'] = is_writable($file);
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313 $fileinfo['executable'] = is_executable($file);
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316 $fileinfo['fileperms'] = fileperms($file);
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325 // --------------------------------------------------------------------
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328 * Get Mime by Extension
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330 * Translates a file extension into a mime type based on config/mimes.php.
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331 * Returns FALSE if it can't determine the type, or open the mime config file
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333 * Note: this is NOT an accurate way of determining file mime types, and is here strictly as a convenience
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334 * It should NOT be trusted, and should certainly NOT be used for security
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337 * @param string path to file
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340 if ( ! function_exists('get_mime_by_extension'))
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342 function get_mime_by_extension($file)
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344 $extension = substr(strrchr($file, '.'), 1);
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348 if ( ! is_array($mimes))
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350 if ( ! require_once(APPPATH.'config/mimes.php'))
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356 if (array_key_exists($extension, $mimes))
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358 if (is_array($mimes[$extension]))
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360 // Multiple mime types, just give the first one
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361 return current($mimes[$extension]);
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365 return $mimes[$extension];
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375 // --------------------------------------------------------------------
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378 * Symbolic Permissions
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380 * Takes a numeric value representing a file's permissions and returns
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381 * standard symbolic notation representing that value
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387 if ( ! function_exists('symbolic_permissions'))
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389 function symbolic_permissions($perms)
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391 if (($perms & 0xC000) == 0xC000)
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393 $symbolic = 's'; // Socket
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395 elseif (($perms & 0xA000) == 0xA000)
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397 $symbolic = 'l'; // Symbolic Link
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399 elseif (($perms & 0x8000) == 0x8000)
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401 $symbolic = '-'; // Regular
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403 elseif (($perms & 0x6000) == 0x6000)
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405 $symbolic = 'b'; // Block special
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407 elseif (($perms & 0x4000) == 0x4000)
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409 $symbolic = 'd'; // Directory
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411 elseif (($perms & 0x2000) == 0x2000)
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413 $symbolic = 'c'; // Character special
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415 elseif (($perms & 0x1000) == 0x1000)
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417 $symbolic = 'p'; // FIFO pipe
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421 $symbolic = 'u'; // Unknown
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425 $symbolic .= (($perms & 0x0100) ? 'r' : '-');
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426 $symbolic .= (($perms & 0x0080) ? 'w' : '-');
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427 $symbolic .= (($perms & 0x0040) ? (($perms & 0x0800) ? 's' : 'x' ) : (($perms & 0x0800) ? 'S' : '-'));
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430 $symbolic .= (($perms & 0x0020) ? 'r' : '-');
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431 $symbolic .= (($perms & 0x0010) ? 'w' : '-');
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432 $symbolic .= (($perms & 0x0008) ? (($perms & 0x0400) ? 's' : 'x' ) : (($perms & 0x0400) ? 'S' : '-'));
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435 $symbolic .= (($perms & 0x0004) ? 'r' : '-');
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436 $symbolic .= (($perms & 0x0002) ? 'w' : '-');
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437 $symbolic .= (($perms & 0x0001) ? (($perms & 0x0200) ? 't' : 'x' ) : (($perms & 0x0200) ? 'T' : '-'));
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443 // --------------------------------------------------------------------
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446 * Octal Permissions
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448 * Takes a numeric value representing a file's permissions and returns
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449 * a three character string representing the file's octal permissions
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455 if ( ! function_exists('octal_permissions'))
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457 function octal_permissions($perms)
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459 return substr(sprintf('%o', $perms), -3);
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464 /* End of file file_helper.php */
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465 /* Location: ./system/helpers/file_helper.php */