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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
A variable number of arguments in a PHP function

Do you want to vary the number of arguments you pass in to a PHP function?
   loadarticles(2,3,6,5,4);
   loadarticles(5,7);

Simply declare your function with a minimum of parameters that you need (perhaps zero) and use the func_get_args() function to get you an array of all the parameters. Here's an example:

function loadarticles() {
  $abase = array();
  database_connect();
  $inputs = func_get_args();
  foreach ($inputs as $article) {
    $row = database_get("select * from mt_entry where entry_id = $article");
    $abase[body] .= "<tr><td class=\"pageName\">$row[entry_title]</td></tr>";
    $abase[body] .= "<tr><td class=\"bodytext\">$row[entry_text]</td></tr>";
  }
  return $abase;
}


The func_num_args function can be used to obtain just the number of arguments used to call your current function, and the func_get_arg function to obtain a specific argument by position number.

Although you can write a function to pick up a variable number of arguments, it is usually better programming practice to pass in an array of varying length ... so in other words, I'm advising you to used func_get_args sparingly!
(written 2009-11-02)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
H105 - PHP - Functions
  [96] Variable Scope - (2004-10-22)
  [223] There is a function in PHP to do that - (2005-02-21)
  [308] Call by name v call by value - (2005-05-11)
  [339] Passing information into and out of PHP functions - (2005-06-07)
  [340] Code and code maintainance efficiency - (2005-06-08)
  [409] Functions and commands with dangerous names - (2005-08-11)
  [421] Don't repeat code - use loops or functions - (2005-08-21)
  [775] Do not duplicate your code - (2006-06-23)
  [866] A lazy programmer is a good programmer - (2006-09-15)
  [936] Global, Superglobal, Session variables - scope and persistance in PHP - (2006-11-21)
  [1021] PHP - static declaration - (2007-01-04)
  [1163] A better alternative to cutting and pasting code - (2007-04-26)
  [1202] Returning multiple values from a function (Perl, PHP, Python) - (2007-05-24)
  [1267] is there a lookup function in php? - (2007-07-15)
  [1357] Clean my plate, but keep my wine bottle. (PHP; Static) - (2007-09-18)
  [1380] Static variables in PHP - (2007-10-05)
  [1784] Global - Tcl, PHP, Python - (2008-09-03)
  [2630] Static variables and ampersands in PHP - (2010-02-10)
  [2682] Adding extensions to PHP Open Source applications - callbacks - (2010-03-17)
  [2737] Improving your function calls (APIs) - General and PHP - (2010-04-24)
  [2929] Passing a variable number of parameters in to a function / method - (2010-08-20)
  [3026] Coding efficiency - do not repeat yourself! - (2010-11-02)


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