diff options
Diffstat (limited to 'system/core')
| -rw-r--r-- | system/core/Common.php | 528 |
1 files changed, 296 insertions, 232 deletions
diff --git a/system/core/Common.php b/system/core/Common.php index ae147461e..47293a11b 100644 --- a/system/core/Common.php +++ b/system/core/Common.php @@ -16,6 +16,20 @@ // ------------------------------------------------------------------------ /** + * Common Functions + * + * Loads the base classes and executes the request. + * + * @package CodeIgniter + * @subpackage codeigniter + * @category Common Functions + * @author ExpressionEngine Dev Team + * @link http://codeigniter.com/user_guide/ + */ + +// ------------------------------------------------------------------------ + +/** * Determines if the current version of PHP is greater then the supplied value * * Since there are a few places where we conditionally test for PHP > 5 @@ -23,20 +37,20 @@ * * @access public * @param string -* @return bool +* @return bool TRUE if the current version is $version or higher */ -function is_php($version = '5.0.0') -{ - static $_is_php; - $version = (string)$version; - - if ( ! isset($_is_php[$version])) + function is_php($version = '5.0.0') { - $_is_php[$version] = (version_compare(PHP_VERSION, $version) < 0) ? FALSE : TRUE; - } + static $_is_php; + $version = (string)$version; + + if ( ! isset($_is_php[$version])) + { + $_is_php[$version] = (version_compare(PHP_VERSION, $version) < 0) ? FALSE : TRUE; + } - return $_is_php[$version]; -} + return $_is_php[$version]; + } // ------------------------------------------------------------------------ @@ -45,43 +59,43 @@ function is_php($version = '5.0.0') * * is_writable() returns TRUE on Windows servers when you really can't write to * the file, based on the read-only attribute. is_writable() is also unreliable - * on Unix servers if safe_mode is on. + * on Unix servers if safe_mode is on. * * @access private * @return void - */ -function is_really_writable($file) -{ - // If we're on a Unix server with safe_mode off we call is_writable - if (DIRECTORY_SEPARATOR == '/' AND @ini_get("safe_mode") == FALSE) + */ + function is_really_writable($file) { - return is_writable($file); - } + // If we're on a Unix server with safe_mode off we call is_writable + if (DIRECTORY_SEPARATOR == '/' AND @ini_get("safe_mode") == FALSE) + { + return is_writable($file); + } - // For windows servers and safe_mode "on" installations we'll actually - // write a file then read it. Bah... - if (is_dir($file)) - { - $file = rtrim($file, '/').'/'.md5(mt_rand(1,100).mt_rand(1,100)); + // For windows servers and safe_mode "on" installations we'll actually + // write a file then read it. Bah... + if (is_dir($file)) + { + $file = rtrim($file, '/').'/'.md5(mt_rand(1,100).mt_rand(1,100)); - if (($fp = @fopen($file, FOPEN_WRITE_CREATE)) === FALSE) + if (($fp = @fopen($file, FOPEN_WRITE_CREATE)) === FALSE) + { + return FALSE; + } + + fclose($fp); + @chmod($file, DIR_WRITE_MODE); + @unlink($file); + return TRUE; + } + elseif (($fp = @fopen($file, FOPEN_WRITE_CREATE)) === FALSE) { return FALSE; } fclose($fp); - @chmod($file, DIR_WRITE_MODE); - @unlink($file); return TRUE; } - elseif (($fp = @fopen($file, FOPEN_WRITE_CREATE)) === FALSE) - { - return FALSE; - } - - fclose($fp); - return TRUE; -} // ------------------------------------------------------------------------ @@ -94,60 +108,66 @@ function is_really_writable($file) * * @access public * @param string the class name being requested -* @param bool optional flag that lets classes get loaded but not instantiated +* @param string the directory where the class should be found +* @param string the class name prefix * @return object */ -function &load_class($class, $instantiate = TRUE) -{ - static $objects = array(); - - // Does the class exist? If so, we're done... - if (isset($objects[$class])) + function &load_class($class, $directory = 'libraries', $prefix = 'CI_') { - return $objects[$class]; - } - - // If the requested class does not exist in the application/libraries - // folder we'll load the native class from the system/libraries folder. - if (file_exists(APPPATH.'libraries/'.config_item('subclass_prefix').$class.EXT)) - { - require(BASEPATH.'libraries/'.$class.EXT); - require(APPPATH.'libraries/'.config_item('subclass_prefix').$class.EXT); - $is_subclass = TRUE; - } - else - { - if (file_exists(APPPATH.'libraries/'.$class.EXT)) + static $_classes = array(); + + // Does the class exist? If so, we're done... + if (isset($_classes[$class])) { - require(APPPATH.'libraries/'.$class.EXT); - $is_subclass = FALSE; + return $_classes[$class]; } - else - { - require(BASEPATH.'libraries/'.$class.EXT); - $is_subclass = FALSE; + + $name = FALSE; + + // Look for the class first in the native system/libraries folder + // thenin the local application/libraries folder + foreach (array(BASEPATH, APPPATH) as $path) + { + if (file_exists($path.$directory.'/'.$class.EXT)) + { + $name = $prefix.$class; + + if (class_exists($name) === FALSE) + { + require($path.$directory.'/'.$class.EXT); + } + + break; + } } - } - if ($instantiate == FALSE) - { - $objects[$class] = TRUE; - return $objects[$class]; - } + // Is the request a class extension? If so we load it too + if (file_exists(APPPATH.'libraries/'.config_item('subclass_prefix').$class.EXT)) + { + $name = config_item('subclass_prefix').$class; + + if (class_exists($name) === FALSE) + { + require(APPPATH.'libraries/'.config_item('subclass_prefix').$class.EXT); + } + } - if ($is_subclass == TRUE) - { - $name = config_item('subclass_prefix').$class; + // Did we find the class? + if ($name === FALSE) + { + // Note: We use exit() rather then show_error() in order to avoid a + // self-referencing loop with the Excptions class + exit('Unable to locate the specified class: '.$class.EXT); + } - $objects[$class] =& instantiate_class(new $name()); - return $objects[$class]; - } + // Keep track of what we just loaded + is_loaded($class); - $name = ($class != 'Controller') ? 'CI_'.$class : $class; + $_classes[$class] =& instantiate_class(new $name()); + return $_classes[$class]; + } - $objects[$class] =& instantiate_class(new $name()); - return $objects[$class]; -} +// ------------------------------------------------------------------------ /** * Instantiate Class @@ -161,64 +181,110 @@ function &load_class($class, $instantiate = TRUE) * @param object * @return object */ -function &instantiate_class(&$class_object) -{ - return $class_object; -} + function &instantiate_class(&$class_object) + { + return $class_object; + } + +// -------------------------------------------------------------------- + +/** +* Keeps track of which libraries have been loaded. This function is +* called by the load_class() function above +* +* @access public +* @return array +*/ + function is_loaded($class = '') + { + static $_is_loaded = array(); + + if ($class != '') + { + $_is_loaded[strtolower($class)] = $class; + } + + return $_is_loaded; + } + +// ------------------------------------------------------------------------ /** * Loads the main config.php file * +* This function lets us grab the config file even if the Config class +* hasn't been instantiated yet +* * @access private * @return array */ -function &get_config() -{ - static $main_conf; - - if ( ! isset($main_conf)) + function &get_config($replace = array()) { + static $_config; + + if (isset($_config)) + { + return $_config[0]; + } + + // Fetch the config file if ( ! file_exists(APPPATH.'config/config'.EXT)) { - exit('The configuration file config'.EXT.' does not exist.'); + exit('The configuration file does not exist.'); + } + else + { + require(APPPATH.'config/config'.EXT); } - require(APPPATH.'config/config'.EXT); - + // Does the $config array exist in the file? if ( ! isset($config) OR ! is_array($config)) { exit('Your config file does not appear to be formatted correctly.'); } - $main_conf[0] =& $config; + // Are any values being dynamically replaced? + if (count($replace) > 0) + { + foreach ($replace as $key => $val) + { + if (isset($config[$key])) + { + $config[$key] = $val; + } + } + } + + return $_config[0] =& $config; } - return $main_conf[0]; -} + +// ------------------------------------------------------------------------ /** -* Gets a config item +* Returns the specified config item * * @access public * @return mixed */ -function config_item($item) -{ - static $config_item = array(); - - if ( ! isset($config_item[$item])) + function config_item($item) { - $config =& get_config(); - - if ( ! isset($config[$item])) + static $_config_item = array(); + + if ( ! isset($_config_item[$item])) { - return FALSE; + $config =& get_config(); + + if ( ! isset($config[$item])) + { + return FALSE; + } + $_config_item[$item] = $config[$item]; } - $config_item[$item] = $config[$item]; + + return $_config_item[$item]; } - return $config_item[$item]; -} - +// ------------------------------------------------------------------------ /** * Error Handler @@ -232,13 +298,14 @@ function config_item($item) * @access public * @return void */ -function show_error($message, $status_code = 500) -{ - $error =& load_class('Exceptions'); - echo $error->show_error('An Error Was Encountered', $message, 'error_general', $status_code); - exit; -} + function show_error($message, $status_code = 500, $heading = 'An Error Was Encountered') + { + $_error =& load_class('Exceptions', 'core'); + echo $_error->show_error($heading, $message, 'error_general', $status_code); + exit; + } +// ------------------------------------------------------------------------ /** * 404 Page Handler @@ -250,13 +317,14 @@ function show_error($message, $status_code = 500) * @access public * @return void */ -function show_404($page = '') -{ - $error =& load_class('Exceptions'); - $error->show_404($page); - exit; -} + function show_404($page = '') + { + $_error =& load_class('Exceptions', 'core'); + $_error->show_404($page); + exit; + } +// ------------------------------------------------------------------------ /** * Error Logging Interface @@ -267,20 +335,20 @@ function show_404($page = '') * @access public * @return void */ -function log_message($level = 'error', $message, $php_error = FALSE) -{ - static $LOG; - - $config =& get_config(); - if ($config['log_threshold'] == 0) + function log_message($level = 'error', $message, $php_error = FALSE) { - return; - } + static $_log; - $LOG =& load_class('Log'); - $LOG->write_log($level, $message, $php_error); -} + if (config_item('log_threshold') == 0) + { + return; + } + + $_log =& load_class('Log'); + $_log->write_log($level, $message, $php_error); + } +// ------------------------------------------------------------------------ /** * Set HTTP Status Header @@ -289,89 +357,90 @@ function log_message($level = 'error', $message, $php_error = FALSE) * @param int the status code * @param string * @return void - */ -function set_status_header($code = 200, $text = '') -{ - $stati = array( - 200 => 'OK', - 201 => 'Created', - 202 => 'Accepted', - 203 => 'Non-Authoritative Information', - 204 => 'No Content', - 205 => 'Reset Content', - 206 => 'Partial Content', - - 300 => 'Multiple Choices', - 301 => 'Moved Permanently', - 302 => 'Found', - 304 => 'Not Modified', - 305 => 'Use Proxy', - 307 => 'Temporary Redirect', - - 400 => 'Bad Request', - 401 => 'Unauthorized', - 403 => 'Forbidden', - 404 => 'Not Found', - 405 => 'Method Not Allowed', - 406 => 'Not Acceptable', - 407 => 'Proxy Authentication Required', - 408 => 'Request Timeout', - 409 => 'Conflict', - 410 => 'Gone', - 411 => 'Length Required', - 412 => 'Precondition Failed', - 413 => 'Request Entity Too Large', - 414 => 'Request-URI Too Long', - 415 => 'Unsupported Media Type', - 416 => 'Requested Range Not Satisfiable', - 417 => 'Expectation Failed', - - 500 => 'Internal Server Error', - 501 => 'Not Implemented', - 502 => 'Bad Gateway', - 503 => 'Service Unavailable', - 504 => 'Gateway Timeout', - 505 => 'HTTP Version Not Supported' - ); - - if ($code == '' OR ! is_numeric($code)) + */ + function set_status_header($code = 200, $text = '') { - show_error('Status codes must be numeric', 500); - } + $stati = array( + 200 => 'OK', + 201 => 'Created', + 202 => 'Accepted', + 203 => 'Non-Authoritative Information', + 204 => 'No Content', + 205 => 'Reset Content', + 206 => 'Partial Content', + + 300 => 'Multiple Choices', + 301 => 'Moved Permanently', + 302 => 'Found', + 304 => 'Not Modified', + 305 => 'Use Proxy', + 307 => 'Temporary Redirect', + + 400 => 'Bad Request', + 401 => 'Unauthorized', + 403 => 'Forbidden', + 404 => 'Not Found', + 405 => 'Method Not Allowed', + 406 => 'Not Acceptable', + 407 => 'Proxy Authentication Required', + 408 => 'Request Timeout', + 409 => 'Conflict', + 410 => 'Gone', + 411 => 'Length Required', + 412 => 'Precondition Failed', + 413 => 'Request Entity Too Large', + 414 => 'Request-URI Too Long', + 415 => 'Unsupported Media Type', + 416 => 'Requested Range Not Satisfiable', + 417 => 'Expectation Failed', + + 500 => 'Internal Server Error', + 501 => 'Not Implemented', + 502 => 'Bad Gateway', + 503 => 'Service Unavailable', + 504 => 'Gateway Timeout', + 505 => 'HTTP Version Not Supported' + ); + + if ($code == '' OR ! is_numeric($code)) + { + show_error('Status codes must be numeric', 500); + } - if (isset($stati[$code]) AND $text == '') - { - $text = $stati[$code]; - } + if (isset($stati[$code]) AND $text == '') + { + $text = $stati[$code]; + } - if ($text == '') - { - show_error('No status text available. Please check your status code number or supply your own message text.', 500); - } + if ($text == '') + { + show_error('No status text available. Please check your status code number or supply your own message text.', 500); + } - $server_protocol = (isset($_SERVER['SERVER_PROTOCOL'])) ? $_SERVER['SERVER_PROTOCOL'] : FALSE; + $server_protocol = (isset($_SERVER['SERVER_PROTOCOL'])) ? $_SERVER['SERVER_PROTOCOL'] : FALSE; - if (substr(php_sapi_name(), 0, 3) == 'cgi') - { - header("Status: {$code} {$text}", TRUE); - } - elseif ($server_protocol == 'HTTP/1.1' OR $server_protocol == 'HTTP/1.0') - { - header($server_protocol." {$code} {$text}", TRUE, $code); - } - else - { - header("HTTP/1.1 {$code} {$text}", TRUE, $code); + if (substr(php_sapi_name(), 0, 3) == 'cgi') + { + header("Status: {$code} {$text}", TRUE); + } + elseif ($server_protocol == 'HTTP/1.1' OR $server_protocol == 'HTTP/1.0') + { + header($server_protocol." {$code} {$text}", TRUE, $code); + } + else + { + header("HTTP/1.1 {$code} {$text}", TRUE, $code); + } } -} - + +// -------------------------------------------------------------------- /** * Exception Handler * * This is the custom exception handler that is declaired at the top -* of Codeigniter.php. The main reason we use this is permit -* PHP errors to be logged in our own log files since we may +* of Codeigniter.php. The main reason we use this is to permit +* PHP errors to be logged in our own log files since the user may * not have access to server logs. Since this function * effectively intercepts PHP errors, however, we also need * to display errors based on the current error_reporting level. @@ -380,41 +449,36 @@ function set_status_header($code = 200, $text = '') * @access private * @return void */ -function _exception_handler($severity, $message, $filepath, $line) -{ - // We don't bother with "strict" notices since they will fill up - // the log file with information that isn't normally very - // helpful. For example, if you are running PHP 5 and you - // use version 4 style class functions (without prefixes - // like "public", "private", etc.) you'll get notices telling - // you that these have been deprecated. + function _exception_handler($severity, $message, $filepath, $line) + { + // We don't bother with "strict" notices since they tend to fill up + // the log file with excess information that isn't normally very helpful. + // For example, if you are running PHP 5 and you use version 4 style + // class functions (without prefixes like "public", "private", etc.) + // you'll get notices telling you that these have been deprecated. + if ($severity == E_STRICT) + { + return; + } - if ($severity == E_STRICT) - { - return; - } - - $error =& load_class('Exceptions'); - - // Should we display the error? - // We'll get the current error_reporting level and add its bits - // with the severity bits to find out. + $_error =& load_class('Exceptions', 'core'); - if (($severity & error_reporting()) == $severity) - { - $error->show_php_error($severity, $message, $filepath, $line); - } + // Should we display the error? We'll get the current error_reporting + // level and add its bits with the severity bits to find out. + if (($severity & error_reporting()) == $severity) + { + $_error->show_php_error($severity, $message, $filepath, $line); + } + + // Should we log the error? No? We're done... + if (config_item('log_threshold') == 0) + { + return; + } - // Should we log the error? No? We're done... - $config =& get_config(); - if ($config['log_threshold'] == 0) - { - return; + $_error->log_exception($severity, $message, $filepath, $line); } - $error->log_exception($severity, $message, $filepath, $line); -} - /* End of file Common.php */ |