There are some common functions, which do not need to be initialized. They are globally defined.
is_php($version)
| Syntax |
is_php($version) |
| Parameters |
$version (string) – Version number |
| Return |
TRUE if the running PHP version is at least the one specified or FALSE if not |
| Return Type |
bool |
| Description |
Determines if the PHP version being used is greater than the supplied version number. |
is_really_writable($file)
| Syntax |
is_really_writable($file) |
| Parameters |
$file (string) – File path |
| Return |
TRUE if the path is writable, FALSE if not |
| Return Type |
bool |
| Description |
This function determines the file is writable or not |
config_item($key)
| Syntax |
config_item($key) |
| Parameters |
$key (string) – Config item key |
| Return |
Configuration key value or NULL if not found |
| Return Type |
mixed |
| Description |
This function is used to get the configuration item |
set_status_header($code[, $text = ''])
| Syntax |
set_status_header($code[, $text = '']) |
| Parameters |
- $code (int) – HTTP Response status code
- $text (string) – A custom message to set with the status code.
|
| Return |
|
| Return Type |
void |
| Description |
This function Permits you to manually set a server status header. |
remove_invisible_characters($str[, $url_encoded = TRUE])
| Syntax |
remove_invisible_characters($str[, $url_encoded = TRUE]) |
| Parameters |
- $str (string) – Input string
- $url_encoded (bool) – Whether to remove URL-encoded characters as well.
|
| Return |
Sanitized string |
| Return Type |
string |
| Description |
This function prevents inserting NULL characters between ASCII characters, like Java script. |
html_escape($var)
| Syntax |
html_escape($var) |
| Parameters |
$var (mixed) – Variable to escape (string or array) |
| Return |
HTML escaped string(s) |
| Return Type |
mixed |
| Description |
This function acts as an alias for PHP’s native htmlspecialchars() function, with the advantage of being able to accept an array of strings.It is useful in preventing Cross Site Scripting (XSS). |
get_mimes()
| Syntax |
get_mimes() |
| Return |
An associative array of file types |
| Return Type |
array |
| Description |
This function returns a reference to the MIMEs array from application/config/mimes.php. |
is_https()
| Syntax |
is_https() |
| Return |
TRUE if currently running under CLI, FALSE otherwise |
| Return Type |
bool |
| Description |
TRUE if currently running under CLI, FALSE otherwise. |
is_cli()
| Syntax |
is_cli() |
| Return |
TRUE if currently running under CLI, FALSE otherwise |
| Return Type |
bool |
| Description |
Returns TRUE if the application is run through the command line and FALSE if not. |
function_usable($function_name)
| Syntax |
function_usable($function_name) |
| Parameters |
$function_name (string) – function name |
| Return |
TRUE if the function can be used, FALSE if not |
| Return Type |
bool |
| Description |
Returns TRUE if a function exists and is usable, FALSE otherwise. |
