Helper Functions (category)

Simply returns an empty array: array(). Helper function of WordPress.

Simply returns an empty string:". Helper function of WordPress.

Simply returns false. Helper function of WordPress.

Simply returns null. Auxiliary function of WordPress.

Simply returns true. Helper function of WordPress.

Simply returns 0. Helper function of WordPress. Useful for use in filters.

Gets the first key of the passed array. Does not touch the internal pointer of the array.

Gets the last key of the given array. Does not touch the internal pointer of the array.

Gets the SVG code of the social service: Twitter, Facebook, etc.

Collects a query string from the provided simple/associative array.

Sorts an array of hierarchical posts based on parent relationships (post_parent).

Gets the URL (link) of the current page (request) that triggered the currently running code.

Convert a duration in format HH:ii:ss or ii:ss to human readable format.

Applies the specified function to the values of the passed array/object/string/number. It's a recursive function.

Serializes (turns into a string) the passed data if needed.

Unserialize data only if it was serialized or returns the original value.

Join two filesystem paths together. If the second parameter is an absolute path (starts with a slash), then only it will be returned.

Checks if the specified string (substring) is in another string. Case sensitive.

Checks if the string ends with the specified substring. Case sensitive.

Checks if the string starts with the specified substring. Case sensitive.

Iterates through an array, object, scalar and removes escaping slashes (\) from string values.

Gets the time (in seconds) that has passed since the start of the PHP script execution.

Gets the execution time of the PHP script from the moment the page generation starts until this function is called.

Iterates over all elements of the array and processes all values with the function urlencode(). A string can also be passed.

Leaves elements from the first array whose keys (indexes) match the values of the second array.

Gets the last component from the specified path or URL, retrieving everything after the last /.

Gets a trace with function names — a list of all functions/methods that were called to reach the current place in the code (from where this function was called).

Uses a regular expression to "extract" all links (URLs) from the provided text.

Filters the given array of objects by the specified key=>value parameters.

Gets the separator for list items. What the separator will be depends on the current site locale.

Parses the given text (in the form of HTML code) into HTML tags and comments, returning an array of values: tags and their text.

Checks if the current request is a JSONP request or expects a JSONP response.

Encode a variable into JSON, with some sanity checks. Checks strings and translates them to UTF-8.

Reads and decodes (parses) the specified JSON file.

Translates all keys of the specified array to lowercase (ABC to abc). Keys of nested arrays are also processed.

Gets a list of HTML tag attributes (as an array) from the provided string with attributes.

Gets a list of HTML attributes that (according to the specification) should specify a URL.

Filters an array of objects (or an array of arrays) and retrieves from the array those objects that have the specified parameter.

Collects a specified field from nested arrays of a multidimensional array.

Sorts an array of objects or an array of arrays by one or more fields.

Converts an absolute URL to a relative path. Removes the protocol (http/https) and domain, leaving / at the beginning.

Normalizes the path for a file or folder by replacing backslashes and double slashes with a single one.

Combines two arrays so that the parameters of the first array (passed) replace the parameters of the second array (default) when they match. Parameters can be specified as a string.

Processes/cleans an array of numbers (IDs) or a string where numbers are separated by commas or spaces. Will return an array of numbers.

Breaks a string into an array of values separated by the characters ,   \t \n: comma, space, tab, newline.

Creates an array of tags from a string of words separated by commas, spaces. The values of the array are cleaned using sanitize_title().

Parses the query string, for example, foo=1&foo2=2 and creates an array of data from it.

Parses a URL and returns its components. A wrapper for PHP's parse_url() function that handles consistency in the return values across PHP versions.

Generates a random number between the specified min and max.

Sorts an array and all nested arrays by key in ascending order (a-z).

Sets the specified variables as global if they are specified in the $_GET / $_POST request.

Encodes the passed variable into JSON, prints the result to the screen and terminates the script (die). Used to return data for AJAX requests.

Send a JSON response back to an Ajax request, indicating failure.

Returns JSON data. Is used to return a success response to AJAX request. The response object always contains the element success=true. die() php execution.

Add slashes (\) to a string or array of strings.

Returns a regular expression that matches all kinds of spaces (line breaks, invisible characters, etc.).

Variant of the PHP function sprintf() from WordPress. Supports %l (list) in the passed format.

Creates an empty temporary writable file with a unique name in the temporary directory. After use, the file must be deleted using unlink();

Gets a unique identifier.

Removes slashes from a string or from strings of an array, or properties of an object. The array can be of any nesting level.