Documentation & API reference
Constants
Primary tabs
| Name | Location | Description | Direct uses |
Strings |
|---|---|---|---|---|
| REQUIREMENT_INFO |
drupal/ |
Requirement severity -- Informational message only. | 1 | |
| REQUIREMENT_OK |
drupal/ |
Requirement severity -- Requirement successfully met. | 1 | |
| REQUIREMENT_WARNING |
drupal/ |
Requirement severity -- Warning condition; proceed but flag warning. | 11 | |
| REQUIREMENT_ERROR |
drupal/ |
Requirement severity -- Error condition; abort installation. | 19 | |
| FILE_EXIST |
drupal/ |
File permission check -- File exists. | 4 | |
| FILE_READABLE |
drupal/ |
File permission check -- File is readable. | 6 | |
| FILE_WRITABLE |
drupal/ |
File permission check -- File is writable. | 5 | |
| FILE_EXECUTABLE |
drupal/ |
File permission check -- File is executable. | 3 | |
| FILE_NOT_EXIST |
drupal/ |
File permission check -- File does not exist. | 1 | |
| FILE_NOT_READABLE |
drupal/ |
File permission check -- File is not readable. | 3 | |
| FILE_NOT_WRITABLE |
drupal/ |
File permission check -- File is not writable. | 4 | |
| FILE_NOT_EXECUTABLE |
drupal/ |
File permission check -- File is not executable. | 3 | |
| LANGUAGE_NEGOTIATION_SELECTED |
drupal/ |
No language negotiation. The default language is used. | 6 | |
| STREAM_WRAPPERS_ALL |
drupal/ |
Stream wrapper bit flag -- a filter that matches all wrappers. | ||
| STREAM_WRAPPERS_LOCAL |
drupal/ |
Stream wrapper bit flag -- refers to a local file system location. | 2 | |
| STREAM_WRAPPERS_READ |
drupal/ |
Stream wrapper bit flag -- wrapper is readable (almost always true). | 1 | |
| STREAM_WRAPPERS_WRITE |
drupal/ |
Stream wrapper bit flag -- wrapper is writeable. | 1 | |
| STREAM_WRAPPERS_VISIBLE |
drupal/ |
Stream wrapper bit flag -- exposed in the UI and potentially web accessible. | 1 | |
| FILE_CREATE_DIRECTORY |
drupal/ |
Flag used by file_prepare_directory() -- create directory if not present. | 21 | |
| FILE_MODIFY_PERMISSIONS |
drupal/ |
Flag used by file_prepare_directory() -- file permissions may be changed. | 6 | |
| FILE_EXISTS_RENAME |
drupal/ |
Flag for dealing with existing files: Appends number until name is unique. | 18 | |
| FILE_EXISTS_REPLACE |
drupal/ |
Flag for dealing with existing files: Replace the existing file. | 26 | |
| FILE_EXISTS_ERROR |
drupal/ |
Flag for dealing with existing files: Do nothing and return FALSE. | 12 | |
| FILE_STATUS_PERMANENT |
drupal/ |
Indicates that the file is permanent and should not be deleted. | 17 | |
| VERSION |
drupal/ |
The current system version. | 32 | |
| DRUPAL_CORE_COMPATIBILITY |
drupal/ |
Core API compatibility. | 11 | |
| DRUPAL_MINIMUM_PHP |
drupal/ |
Minimum supported version of PHP. | 4 | |
| DRUPAL_MINIMUM_PHP_MEMORY_LIMIT |
drupal/ |
Minimum recommended value of PHP memory_limit. | ||
| ERROR_REPORTING_HIDE |
drupal/ |
Error reporting level: display no errors. | ||
| ERROR_REPORTING_DISPLAY_SOME |
drupal/ |
Error reporting level: display errors and warnings. | 1 | |
| ERROR_REPORTING_DISPLAY_ALL |
drupal/ |
Error reporting level: display all messages. | 1 | |
| ERROR_REPORTING_DISPLAY_VERBOSE |
drupal/ |
Error reporting level: display all messages, plus backtrace information. | 2 | |
| WATCHDOG_EMERGENCY |
drupal/ |
Log message severity -- Emergency: system is unusable. | 2 | |
| WATCHDOG_ALERT |
drupal/ |
Log message severity -- Alert: action must be taken immediately. | 2 | |
| WATCHDOG_CRITICAL |
drupal/ |
Log message severity -- Critical conditions. | 2 | |
| WATCHDOG_ERROR |
drupal/ |
Log message severity -- Error conditions. | 26 | |
| WATCHDOG_WARNING |
drupal/ |
Log message severity -- Warning conditions. | 19 | |
| WATCHDOG_NOTICE |
drupal/ |
Log message severity -- Normal but significant conditions. | 28 | |
| WATCHDOG_INFO |
drupal/ |
Log message severity -- Informational messages. | 9 | |
| WATCHDOG_DEBUG |
drupal/ |
Log message severity -- Debug-level messages. | 3 | |
| DRUPAL_BOOTSTRAP_CONFIGURATION |
drupal/ |
First bootstrap phase: initialize configuration. | 6 | |
| DRUPAL_BOOTSTRAP_KERNEL |
drupal/ |
Second bootstrap phase, initalize a kernel. | 1 | |
| DRUPAL_BOOTSTRAP_PAGE_CACHE |
drupal/ |
Third bootstrap phase: try to serve a cached page. | 1 | |
| DRUPAL_BOOTSTRAP_DATABASE |
drupal/ |
Fourth bootstrap phase: initialize database layer. | 3 | |
| DRUPAL_BOOTSTRAP_VARIABLES |
drupal/ |
Fifth bootstrap phase: initialize the variable system. | 5 | |
| DRUPAL_BOOTSTRAP_SESSION |
drupal/ |
Sixth bootstrap phase: initialize session handling. | 4 | |
| DRUPAL_BOOTSTRAP_PAGE_HEADER |
drupal/ |
Seventh bootstrap phase: set up the page header. | 1 | |
| DRUPAL_BOOTSTRAP_CODE |
drupal/ |
Eighth bootstrap phase: load code for subsystems and modules. | 5 | |
| DRUPAL_BOOTSTRAP_FULL |
drupal/ |
Final bootstrap phase: initialize language, path, theme, and modules. | 7 | |
| DRUPAL_ANONYMOUS_RID |
drupal/ |
Role ID for anonymous users; should match what's in the "role" table. | 40 |