artabro/wire/core/FunctionsAPI.php
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<?php namespace ProcessWire;
/**
* ProcessWire functions API maps function names to common API variables
*
* #pw-summary-Functions-API =
* Provides an alternative to the API variables by providing functions of the same
* name, with these benefits:
*
* - They are always in scope whether inside a function or outside of it.
* - They are self documenting with your IDE, unlike API $variables.
* - They cannot be accidentally overwritten the way variables can be.
* - They provider greater contrast between what are API-calls and variables.
* - In some cases it makes for shorter API calls.
* - Some of the functions provide arguments for useful shortcuts.
*
* These functions always refer to the current ProcessWire instance, so are intended
* primarily for front-end usage in template files (not for modules).
*
* If these functions are not working for you, you can enable them by setting
* `$config->useFunctionsAPI=true;` in your /site/config.php file.
*
* Regardless of whether the Functions API is enabled or not, you can also access
* any of these functions by prefixing the word `wire` to them and using the format
* `wireFunction()` i.e. `wirePages()`, `wireUser()`, etc.
* Or, if you do not
* #pw-summary-Functions-API
*
*/
/**
* Retrieve or save pages ($pages API variable as a function)
*
* Accessing `pages()` is exactly the same as accessing `$pages`. Though there are a couple of optional
* shortcuts available by providing an argument to this function.
*
* ~~~~
* // A call with no arguments returns the $pages API variable
* $pages = pages();
* $pageArray = pages()->find("selector");
* $page = pages()->get(123);
*
* // Providing selector as argument maps to $pages->find()
* $pageArray = pages("template=basic-page");
*
* // Providing argument of single page ID, path or name maps to $pages->get()
* $page = pages(123);
* $page = pages("/path/to/page/");
* $page = pages("page-name");
* ~~~~
*
* #pw-group-Functions-API
*
* @param string|array|int $selector Specify one of the following:
* - Nothing, makes it return the $pages API variable.
* - Selector (string) to find matching pages, makes function return PageArray - equivalent to $pages->find("selector");
* - Page ID (int) to return a single matching Page - equivalent to $pages->get(123);
* - Page name (string) to return a single page having the given name - equivalent to $pages->get("name");
* @return Pages|PageArray|Page|NullPage
* @see Pages
*
*/
function pages($selector = '') {
return wirePages($selector);
}
/**
* Returns the current Page being viewed ($page API variable as a function)
*
* This function behaves the same as the `$page` API variable, though does support optional
* arguments as shortcuts for getting from the page or setting values to it.
*
* ~~~~
* $page = page(); // Simply get $page API var
*
* // Get the “body” field
* $body = page()->body; // direct syntax
* $body = page()->get('body'); // regular syntax
* $body = page('body'); // shortcut syntax
*
* // Get the “headline” field or fallback to “title
* $headline = page()->get('headline|title'); // regular syntax
* $headline = page('headline|title'); // shortcut syntax
*
* // Set the “headline” field
* page()->headline = 'My headline'; // direct syntax
* page()->set('headline', 'My headline'); // regular syntax
* page('headline', 'My headline'); // shortcut syntax
* ~~~~
*
* #pw-group-Functions-API
*
* @param string $key Optional property to get or set
* @param null $value Optional value to set
* @return Page|mixed
* @see Page
*
*/
function page($key = '', $value = null) {
return wirePage($key, $value);
}
/**
* Return id for given page or false if its not a page
*
* Returns positive int (page id) for page that exists, 0 for NullPage,
* or false if given $value is not a Page.
*
* #pw-group-Functions-API
*
* @param Page|mixed $value
* @return int|false
* @since 3.0.224
*
*/
function pageId($value) {
return wirePageId($value);
}
/**
* Access a ProcessWire configuration setting ($config API variable as a function)
*
* This function behaves the same as the `$config` API variable, though does support
* optional shortcut arguments for getting/setting values.
*
* ~~~~~
* $config = config(); // Simply get $config API var
* $debug = config()->debug; // Get value of debug
* $debug = config('debug'); // Same as above, shortcut syntax
* config()->debug = true; // Set value of debug
* config('debug', true); // Same as above, shortcut syntax
* ~~~~~
*
* #pw-group-Functions-API
*
* @param string $key
* @param null $value
* @return Config|mixed
* @see Config
*
*/
function config($key = '', $value = null) {
return wireConfig($key, $value);
}
/**
* Get a module, get module information, and much more ($modules API variable as a function)
*
* This function behaves the same as the `$modules` API variable, though does support
* an optional shortcut argument for getting a module.
*
* ~~~~~
* $modules = modules(); // Simply get $modules API var
* $module = modules()->get('ModuleName'); // Get a module
* $module = modules('ModuleName'); // Shortcut to get a module
* ~~~~~
*
* #pw-group-Functions-API
*
* @param string $name Optionally retrieve the given module name
* @return Modules|Module|ConfigurableModule|null
* @see Modules
*
*/
function modules($name = '') {
return wireModules($name);
}
/**
* Get the currently logged in user ($user API variable as a function)
*
* This function behaves the same as the `$user` API variable, though does support
* optional shortcut arguments for getting or setting values.
*
* #pw-group-Functions-API
*
* @param string $key Optional property to get or set
* @param null $value Optional value to set
* @return User|mixed
* @see User
*
*/
function user($key = '', $value = null) {
return wireUser($key, $value);
}
/**
* Get, find or save users ($users API variable as a function)
*
* This function behaves the same as the `$users` API variable, though does support
* an optional shortcut argument for getting a single user or finding multiple users.
*
* ~~~~~~
* // Get a single user (regular and shortcut syntax)
* $u = users()->get('karen');
* $u = users('karen');
*
* // Find multiple users (regular and shortcut syntax)
* $us = users()->find('roles.name=editor');
* $us = users('roles.name=editor');
* ~~~~~~
*
* #pw-group-Functions-API
*
* @param string|array|int $selector Optional selector to send to find() or get()
* - Specify user name or ID to get and return that User
* - Specify a selector string to find all users matching selector (PageArray)
* @return Users|PageArray|User|mixed
* @see pages(), Users
*
*/
function users($selector = '') {
return wireUsers($selector);
}
/**
* Get or set values in the current user session ($session API variable as a function)
*
* This function behaves the same as the `$session` API variable, though does support
* optional shortcut arguments for getting or setting values.
*
* ~~~~~
* // Get a value from the session
* $foo = session()->foo; // direct syntax
* $foo = session()->get('foo'); // regular syntax
* $foo = session('foo'); // shortcut syntax
*
* // Set a value to the session
* session()->foo = 'bar'; // direct syntax
* session()->set('foo', 'bar'); // regular syntax
* session('foo', 'bar'); // shortcut syntax
* ~~~~~
*
* #pw-group-Functions-API
*
* @param string $key Optional property to get or set
* @param null $value Optional value to set
* @return Session|null|string|array|int|float
* @see Session
*
*/
function session($key = '', $value = null) {
return wireSession($key, $value);
}
/**
* Get or save fields independent of templates ($fields API variable as as function)
*
* This function behaves the same as the `$fields` API variable, though does support
* an optional shortcut argument for getting a single field.
*
* ~~~~~
* $field = fields()->get('title'); // regular syntax
* $field = fields('title'); // shortcut syntax
* ~~~~~
*
* #pw-group-Functions-API
*
* @param string $name Optional field name to retrieve
* @return Fields|Field|null
* @see Fields
*
*/
function fields($name = '') {
return wireFields($name);
}
/**
* Get or save templates ($templates API variable as a function)
*
* This function behaves the same as the `$templates` API variable, though does support
* an optional shortcut argument for getting a single template.
*
* ~~~~~~
* $t = templates()->get('basic-page'); // regular syntax
* $t = templates('basic-page'); // shortcut syntax
* ~~~~~~
*
* #pw-group-Functions-API
*
* @param string $name Optional template to retrieve
* @return Templates|Template|null
* @see Templates
*
*/
function templates($name = '') {
return wireTemplates($name);
}
/**
* Create and execute PDO database queries ($database API variable as a function)
*
* #pw-group-Functions-API
*
* @return WireDatabasePDO
* @see WireDatabasePDO
*
*/
function database() {
return wireDatabase();
}
/**
* Get, find or save permissions ($permissions API variable as a function)
*
* Accessing `permissions()` is exactly the same as accessing `$permissions`. Though there are a couple of optional
* shortcuts available by providing an argument to this function.
*
* ~~~~~
* // Get a permission
* $p = permissions()->get('page-edit'); // regular syntax
* $p = permissions('page-edit'); // shortcut syntax
*
* // Find permissions
* $ps = permissions()->find('name^=page'); // regular syntax
* $ps = permissions('name^=page'); // shortcut syntax
* ~~~~~
*
* #pw-group-Functions-API
*
* @param string|int $selector
* - Specify permission name or ID to retrieve that Permission (Permission)
* - Specify a selector string to return all permissions matching selector (PageArray)
* @return Permissions|Permission|PageArray|null|NullPage
* @see Permissions
*
*/
function permissions($selector = '') {
return wirePermissions($selector);
}
/**
* Get, find or save roles ($roles API variable as a function)
*
* Accessing `roles()` is exactly the same as accessing `$roles`. Though there are a couple of optional
* shortcuts available by providing an argument to this function.
*
* #pw-group-Functions-API
*
* @param string|int $selector
* - Specify name or ID of role to get (Role object)
* - Specify selector string matching roles to find (PageArray object)
* @return Roles|Role|PageArray|null|NullPage
* @see Roles
*
*/
function roles($selector = '') {
return wireRoles($selector);
}
/**
* Sanitize variables and related string functions ($sanitizer API variable as a function)
*
* This behaves the same as the `$sanitizer` API variable but supports arguments as optional shortcuts.
*
* ~~~~~
* $clean = sanitizer()->pageName($dirty); // regular syntax
* $clean = sanitizer('pageName', $dirty); // shortcut syntax
* ~~~~~
*
* #pw-group-Functions-API
*
* @param string $name Optionally enter a sanitizer function name
* @param string $value If $name populated, enter the value to sanitize
* @return Sanitizer|string|int|array|null|mixed
* @see Sanitizer
*
*/
function sanitizer($name = '', $value = '') {
return wireSanitizer($name, $value);
}
/**
* Access date and time related tools ($datetime API variable as a function)
*
* This behaves the same as the `$datetime` API variable except that you can optionally provide
* arguments as a shortcut to the `$datetime->formatDate()` method.
*
* ~~~~~
* $str = datetime()->relativeTimeStr('2016-10-10');
* $str = datetime('Y-m-d'); // shortcut to formatDate method
* $str = datetime('Y-m-d', time()); // shortcut to formatDate method
* ~~~~~
*
* #pw-group-Functions-API
*
* @param string $format Optional date format
* @param string|int $value Optional date to format
* @return WireDateTime|string|int
* @see WireDateTime
*
*/
function datetime($format = '', $value = '') {
return wireDatetime($format, $value);
}
/**
* Access tools for working on the file system ($files API variable as a function)
*
* This behaves identically to the `$files` API variable and as no optional arguments.
*
* #pw-group-Functions-API
*
* @return WireFileTools
* @see WireFileTools
*
*/
function files() {
return wireFiles();
}
/**
* Get and save caches ($cache API variable as a function)
*
* This behaves the same as the $cache API variable but does support arguments as a
* shortcut for the `$cache->get()` method.
*
* - If called with no arguments it returns the $cache API variable.
* - If called with arguments, it can be used the same as `WireCache::get()`.
*
* #pw-group-Functions-API
*
* @param string $name
* @param callable|int|string|null $expire
* @param callable|int|string|null $func
* @return WireCache|string|array|PageArray|null
* @see WireCache, WireCache::get()
*
*/
function cache($name = '', $expire = null, $func = null) {
return wireCache($name, $expire, $func);
}
/**
* Access all installed languages in multi-language environment ($languages API variable as a function)
*
* Returns the `$languages` API variable, or a `Language` object if given a language name or ID.
*
* ~~~~
* $languages = languages(); // Languages if active, null if not
* $en = languages()->getDefault(); // Get default language
* $de = languages()->get('de'); // Get another language
* $de = languages('de'); // Get another language (shorcut syntax)
* ~~~~
*
* #pw-group-Functions-API
*
* @param string|int $name Optional Language name or ID for language to retrieve
* @return Languages|Language|NullPage|null
* @see Languages, Languages::get(), Language
*
*/
function languages($name = '') {
return wireLanguages($name);
}
/**
* Access GET, POST or COOKIE input variables and more ($input API variable as a function)
*
* - Default behavior with no arguments is to return the `$input` API variable.
* - If given just a `$type` argument (like “get” or “post”), it will return a `WireInputData` object for that type.
* - If given a `$type` and `$key` arguments, it will return the value, or null if not present.
* - If `$sanitizer` argument given, the returned value will also be run through the given sanitizer.
* - If the `$sanitizer` argument is an array, the returned input value must be within the given list, or null if not (3.0.125+).
* - If `$fallback` argument given, it will return the fallback value if input value was not present or not valid (3.0.125+).
* - See the `WireInput::get()` method for all options.
*
* ~~~~~
* // Can be used the same way as the $input API variable
* // In examples below the “post” can also be “get” or “cookie”
* $input = input(); // Returns $input API var (WireInput)
* $post = input()->post(); // Returns $input->post (WireInputData instance)
* $foo = input()->post('foo'); // Returns POST variable “foo”
* $bar = input()->post('bar', 'text'); // Returns “bar” after text sanitizer (3.0.125+)
* $s = input()->post('s', ['foo', 'bar', 'baz']); // POST var “s” must match given list (3.0.125+)
*
* // You can also move the arguments all to the function call if you prefer:
* $s = input('get', 'sort'); // Returns GET var “sort”
* $s = input('get', 'sort', 'fieldName'); // Returns “sort” after “fieldName” sanitizer
* $s = input('get', 'sort', ['title', 'created']); // Require sort to be one in given array (3.0.125+)
* $s = input('get', 'sort', ['title', 'created'], 'title'); // Same as above, fallback to 'title' (3.0.125+)
* ~~~~~
*
* #pw-group-Functions-API
*
* @param string $type Optionally indicate "get", "post", "cookie" or "whitelist"
* @param string $key If getting a value, specify name of input property containing value
* @param string $sanitizer Optionally specify sanitizer name to run value through, or in 3.0.125+ may also be an array of allowed values.
* @param string|int|null $fallback Value to fallback to if input not present or invalid
* @return WireInput|WireInputData|array|string|int|null
* @see WireInput
*
*/
function input($type = '', $key = '', $sanitizer = null, $fallback = null) {
return wireInput($type, $key, $sanitizer, $fallback);
}
/**
* Access the $input->get API variable as a function
*
* This is the same as the input() function except that the $type "get" is already implied.
*
* #pw-internal
*
* @param string $key
* @param string $sanitizer
* @return WireInputData|string|int|array|null
*
*/
function inputGet($key = '', $sanitizer = '') {
return wireInputGet($key, $sanitizer);
}
/**
* Access the $input->post API variable as a function
*
* This is the same as the input() function except that the $type "post" is already implied.
*
* #pw-internal
*
* @param string $key
* @param string $sanitizer
* @return WireInputData|string|int|array|null
*
*/
function inputPost($key = '', $sanitizer = '') {
return wireInputPost($key, $sanitizer);
}
/**
* Access the $input->cookie API variable as a function
*
* This is the same as the input() function except that the $type "cookie" is already implied.
*
* #pw-internal
*
* @param string $key
* @param string $sanitizer
* @return WireInputData|string|int|array|null
*
*/
function inputCookie($key = '', $sanitizer = '') {
return wireInputCookie($key, $sanitizer);
}
/**
* Get one of any named system URLs (shortcut to the $config API variable “urls” property)
*
* URLs always have a trailing slash.
*
* ~~~~~
* // you can use either syntax below, where “templates” can be the name for any system URL
* $url = urls()->templates;
* $url = urls('templates');
* ~~~~~
*
* #pw-group-Functions-API
*
* @param string $key
* @return null|Paths|string
* @see Config::urls()
*
*/
function urls($key = '') {
return wireUrls($key);
}
/**
* Get one of any named server disk paths (shortcut to the $config API variable “paths” property)
*
* Paths always have a trailing slash.
*
* ~~~~~
* // you can use either syntax below, where “templates” can be the name for any system URL
* $path = paths()->templates;
* $path = paths('templates');
* ~~~~~
*
* #pw-group-Functions-API
*
* @param string $key
* @return null|Paths|string
* @see Config::paths()
*
*/
function paths($key = '') {
return wirePaths($key);
}
/**
* Start or stop a profiler event or return WireProfilerInterface instance
*
* #pw-internal
*
* @param string|array|object|null $name Name of event to start or event to stop
* @param null|object|string $source If starting an event, optional source of event (object)
* @param array $data Optional extra data as associative array
* @return null|array|object
*
*/
function profiler($name = null, $source = null, $data = array()) {
return wireProfiler($name, $source, $data);
}
/**
* Get or set an output region (primarily for front-end output usage)
*
* This function is an convenience for storing markup that ultimately gets output in a _main.php file
* (or whatever file `$config->appendTemplateFile` is set to). It is an alternative to passing variables
* between included files and provides an interface for setting, appending, prepending and ultimately
* getting markup (or other strings) for output. Its designed for use the the “Delayed Output” strategy,
* though does not necessarily require it.
*
* This function can also be accessed as `wireRegion()`, and that function is always available
* regardless of whether the Functions API is enabled or not.
*
* *Note: unlike other functions in the Functions API, this function is not related to API variables.*
*
* ~~~~~
* // define a region
* region('content', '<p>this is some content</p>');
*
* // prepend some text to region
* region('+content', '<h2>Good morning</h2>');
*
* // append some text to region
* region('content+', '<p><small>Good night</small></p>');
*
* // output a region
* echo region('content');
*
* // get all regions in an array
* $regions = region('*');
*
* // clear the 'content' region
* region('content', '');
*
* // clear all regions
* region('*', '');
* ~~~~~
*
* #pw-group-Functions-API
*
* @param string $key Name of region to get or set.
* - Specify "*" to retrieve all defined regions in an array.
* - Prepend a "+" to the region name to have it prepend your given value to any existing value.
* - Append a "+" to the region name to have it append your given value to any existing value.
* - Prepend a "++" to region name to make future calls without "+" automatically prepend.
* - Append a "++" to region name to make future calls without "+" to automatically append.
* @param null|string $value If setting a region, the text that you want to set.
* @return string|null|bool|array Returns string of text when getting a region, NULL if region not set, or TRUE if setting region.
*
*/
function region($key = '', $value = null) {
return wireRegion($key, $value);
}
/**
* Get or set a runtime site setting
*
* This is a simple helper function for maintaining runtime settings in a site profile.
* It simply sets and gets settings that you define. It is preferable to using ProcessWires
* `$config` or `config()` API var/function because it is not used to store anything else for
* ProcessWire. It is also preferable to using a variable (or variables) because it is always
* in scope and accessible anywhere in your template files, even within existing functions.
*
* *Note: unlike other functions in the Functions API, this function is not related to API variables.*
*
* ~~~~~
* // set a setting named “foo” to value “bar”
* setting('foo', 'bar');
*
* // get a setting named “foo”
* $value = setting('foo');
*
* // set or replace multiple settings
* setting([
* 'foo' => 'value',
* 'bar' => 123,
* 'baz' => [ 'foo', 'bar', 'baz' ]
* ]);
*
* // get all settings in associative array
* $a = setting();
*
* // to unset a setting
* setting(false, 'foo');
* ~~~~~
*
* #pw-group-Functions-API
*
* @param string|array $name Setting name, or array to set multiple
* @param string|int|array|float|mixed $value Value to set, or omit if getting value of $name (default=null)
* @return array|string|int|bool|mixed|null
*
*/
function setting($name = '', $value = null) {
return wireSetting($name, $value);
}