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The number of arguments that a function takes is called the arity of the function. A function that takes a single argument as input, such as () =, is called a unary function. A function of two or more variables is considered to have a domain consisting of ordered pairs or tuples of argument values. The argument of a circular function is an angle.
A page containing the template needs to be in a category the template itself does not belong in. A word, description or some other chunk is meaningless on the template page that holds meaning on a page using the template, such as a table format, part of an equation, et cetera...
Using a template is similar to calling a function in programming. When called, it returns a value. For a template, calling is known as a template call and the return value is known as the expansion of the template, which is treated as part of the calling page's source. Like functions, some templates can take parameters that affect their output.
Copy a template section into a test-page edit-window, for debug. Copy a template section to the top of the template, for debug. Restructure a template so that each section is more separated. The basic strategy: isolate the code section to be debugged. Next, the testing, of each section of code, is crucial. There are some age-old adages to heed:
The template argument size counter keeps track of the total length of template arguments that have been substituted. Its limit is the same as the article size limit. Example: {{3x|{{2x|abcde}}}} has a template argument size of 40 bytes: the argument abcdeabcde is counted 3 times, the argument abcde twice.
Functions can be defined inside code blocks, permitting a run-time decision as to whether or not a function should be defined. There is no concept of local functions. Function calls must use parentheses with the exception of zero argument class constructor functions called with the PHP new operator, where parentheses are optional.
This template is designed as a navigation aid to the most significant articles about PHP. It is not meant to have exhaustive lists (incomplete or complete) of PHP software, PHP people, all PHP articles, etc. However, feel free to add it to any PHP-related articles.
This module is for a very particular set of circumstances: when a substituted template needs to dynamically generate the wikimarkup for a template call, forwarding all numbered parameters. It also allows for the option of designating a prefix for a series of named parameters which will be converted to numbered ones.