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A more complex example: the expression a [/ html / @lang = 'en'][@href = 'help.php'][1]/ @target selects the value of the target attribute of the first a element among the children of the context node that has its href attribute set to help.php, provided the document's html top-level element also has a lang attribute set to en. The reference to ...
When editing source, links are inserted or deleted simply by adding or removing pairs of square brackets enclosing the text concerned (plus handling piped links). There are some helpful tools: When using the visual editor , selecting some text, then clicking the link icon above the text box (two links of a chain) will allow the link to be added ...
Even though PHP's urlencode() automatically percent-encodes them, these characters do not get URL-encoded by wfUrlencode(). The ":" symbol is a partial exception – it is not encoded anywhere except for IIS 7.0.
Wikipedia has categories of articles; for example, "Phrases". Adding the wikitext [[Category:Phrases]] to an article will add that article to the category "Phrases". (This will not create any visible addition to the body text of the article.) If you instead want to create a visible link to a category, add a colon in front of the word "Category".
Example of a web form with name-value pairs. A name–value pair, also called an attribute–value pair, key–value pair, or field–value pair, is a fundamental data representation in computing systems and applications. Designers often desire an open-ended data structure that allows for future extension without modifying existing code or data.
find the value (if any) that is bound to a given key. The argument to this operation is the key, and the value is returned from the operation. If no value is found, some lookup functions raise an exception, while others return a default value (such as zero, null, or a specific value passed to the constructor).
A small phone book as a hash table. In computer science, a hash table is a data structure that implements an associative array, also called a dictionary or simply map; an associative array is an abstract data type that maps keys to values. [2]
Unlike function and class names, variable names are case-sensitive. Both double-quoted ("") and heredoc strings allow the ability to embed a variable's value into the string. [13] As in C, variables may be cast to a specific type by prefixing the type in parentheses. PHP treats newlines as whitespace, in the manner of a free-form language.