call_user_func() or call_user_func_array() functions in PHP

By: Boards Emailed: 1648 times Printed: 2121 times    

Latest comments
By: rohit kumar - how this program is work
By: Kirti - Hi..thx for the hadoop in
By: Spijker - I have altered the code a
By: ali mohammed - why we use the java in ne
By: ali mohammed - why we use the java in ne
By: mizhelle - when I exported the data
By: raul - no output as well, i'm ge
By: Rajesh - thanx very much...
By: Suindu De - Suppose we are executing

If you want to call a static function (PHP5) in a variable method:
Make an array of two entries where the 0th entry is the name of the class to be invoked ('self' and 'parent' work as well) and the 1st entry is the name of the function.  Basically, a 'callback' variable is either a string (the name of the function) or an array (0 => 'className', 1 => 'functionName').


Then, to call that function, you can use either call_user_func() or call_user_func_array().  Examples:


<?php
class A {
  protected $a;
  protected $c;
  function __construct() {
$this->a = array('self', 'a');
$this->c = array('self', 'c');
  }
  static function a($name, &$value) {
    echo $name,' => ',$value++,"\n";
  }
  function b($name, &$value) {
call_user_func_array($this->a, array($name, &$value));
  }
  static function c($str) {
    echo $str,"\n";
  }
  function d() {
call_user_func_array($this->c, func_get_args());
  }
  function e() {
call_user_func($this->c, func_get_arg(0));
  }
}
class B extends A {
  function __construct() {
$this->a = array('parent', 'a');
$this->c = array('self', 'c');
  }
  static function c() {
print_r(func_get_args());
  }
  function d() {
call_user_func_array($this->c, func_get_args());
  }
  function e() {
call_user_func($this->c, func_get_args());
  }
}
$a =& new A;
$b =& new B;
$i = 0;
A::a('index', $i);
$a->b('index', $i);
$a->c('string');
$a->d('string');
$a->e('string');
# etc.
?>

PHP Home | All PHP Tutorials | Latest PHP Tutorials

Sponsored Links

If this tutorial doesn't answer your question, or you have a specific question, just ask an expert here. Post your question to get a direct answer.



Bookmark and Share

Comments(0)


Be the first one to add a comment

Your name (required):


Your email(required, will not be shown to the public):


Your sites URL (optional):


Your comments:



More Tutorials by Boards
call_user_func() or call_user_func_array() functions in PHP

More Tutorials in PHP
PHP code to import from CSV file to MySQL
PHP code to write to a CSV file from MySQL query
PHP code to write to a CSV file for Microsoft Applications
Convert XML to CSV in PHP
Password must include both numeric and alphabetic characters - Magento
PHP file upload (Large Files)
PHP file upload prompts authentication for anonymous users
PHP file upload with IIS on windows XP/2000 etc
Error: Length parameter must be greater than 0
Multiple File Upload in PHP using IFRAME
Resume or Pause File Uploads in PHP
Exception in module wampmanager.exe at 000F15A0 in Windows 8
Handling file locks in PHP
HTML table output using Nested for loops in PHP
Count occurrences of a character in a String in PHP

More Latest News
Most Viewed Articles (in PHP )
Exception in module wampmanager.exe at 000F15A0 in Windows 8
isset() function in PHP
Handling BLOB in PHP and MySQL
Reading Cookie Values in PHP
Parent: child process exited with status 3221225477 -- Restarting
Cannot load /usr/local/apache/libexec/libphp4.so into server: ld.so.1:......
Get the next working day in PHP
Return multiple values from a function in PHP
History and origin of PHP
.htaccess pcfg_openfile: unable to check htaccess file, ensure it is readable
superglobals in PHP
Assignment operators in PHP
public, protected, and private Properties in PHP
Reading contents of a File into a String in PHP
Reading word by word from a file in PHP
Most Emailed Articles (in PHP)
PHP code to write to a CSV file for Microsoft Applications
PHP code to write to a CSV file from MySQL query
PHP code to import from CSV file to MySQL
Convert XML to CSV in PHP
Using PEAR::Crypt_HMAC in PHP
Password must include both numeric and alphabetic characters - Magento
GDBM, NDBM, DB2, DB3, DBM, and CDB Databases in PHP
Resume or Pause File Uploads in PHP
Comparison operators in PHP
Extract files from a .zip file using PHP
Appending One Array to Another in PHP
Exception in module wampmanager.exe at 000F15A0 in Windows 8
isset() function in PHP
do...while Loops in PHP
Counting Lines, Paragraphs, or Records in a File using pc_split_paragraphs() in PHP