Function with Undefined Number of Arguments in PHP

Home > PHP

Q

How To Define a Function with Any Number of Arguments? in PHP?

✍: FYIcenter.com

A

If you want to define a function with any number of arguments, you need to:

Declare the function with no argument.
Call func_num_args() in the function to get the number of the arguments.
Call func_get_args() in the function to get all the arguments in an array.

Here is a PHP script on how to handle any number of arguments:

<?php
function myAverage() {
  $count = func_num_args();
  $args = func_get_args();
  $sum = array_sum($args);
  return $sum/$count;  
}
$average = myAverage(102, 121, 105);
print("Average 1: $average\n");
$average = myAverage(102, 121, 105, 99, 101, 110, 116, 101, 114);
print("Average 2: $average\n");
?>

This script will print:

Average 1: 109.33333333333
Average 2: 107.66666666667

Â

â‡’Creating Your Own Functions in PHP

â‡’â‡’PHP Tutorials

2016-12-04, 1154👍, 0💬

Specifying Argument Default Values in PHP
How To Specify Argument Default Values? in PHP? If you want to allow the caller to skip an argument when calling a function, you can define the argument with a default value when defining the function. Adding a default value to an argument can be done like this "function name($arg=expression){}. Her... 2016-12-04, 1619👍, 0💬

Returning a Reference from a Function in PHP
How To Return a Reference from a Function? in PHP? To return a reference from a function, you need to: Add the reference operator "&" when defining the function. Add the reference operator "&" when invoking the function. Here is a PHP script on how to return a reference from a functi... 2016-12-08, 1556👍, 0💬

Reading the Entire File to a String in PHP
How To Read the Entire File into a Single String in PHP? If you have a file, and you want to read the entire file into a single string, you can use the file_get_contents() function. It opens the specified file, reads all characters in the file, and returns them in a single string. Here is a PHP scri... 2016-12-04, 1294👍, 0💬

Function Returns Data by Value in PHP
How Values Are Returned from Functions? in PHP? If a value is returned from a function, it is returned by value, not by reference. That means that a copy of the value is return. Here is a PHP script on how values are returned from a function: <?php $favor = "vbulletin"; function getFavor() { ... 2016-12-08, 1240👍, 0💬

Reading a Text File to an Array in PHP
How To Read a Text File into an Array in PHP? If you have a text file with multiple lines, and you want to read those lines into an array, you can use the file() function. It opens the specified file, reads all the lines, puts each line as a value in an array, and returns the array to you. Here is a... 2016-12-04, 1186👍, 0💬

Opening a File for Writing in PHP
How To Open a File for Writing in PHP? If you want to open a new file and write date to the file, you can use the fopen($fileName, "w") function. It creates the specified file, and returns a file handle. The second argument "w" tells PHP to open the file for writing. Once the file is open, you can u... 2016-12-02, 1170👍, 0💬

Accessing Global Variables inside a Function in PHP
How To Access a Global Variable inside a Function? in PHP? By default, global variables are not accessible inside a function. However, you can make them accessible by declare them as "global" inside a function. Here is a PHP script on declaring "global" variables: <?php ?> $intRate = 5... 2016-12-08, 1159👍, 0💬

Function with Undefined Number of Arguments in PHP
How To Define a Function with Any Number of Arguments? in PHP? If you want to define a function with any number of arguments, you need to: Declare the function with no argument. Call func_num_args() in the function to get the number of the arguments. Call func_get_args() in the function to get all t... 2016-12-04, 1155👍, 0💬

Global Variables in Main Script in PHP
What Is the Scope of a Variable Defined outside a Function? in PHP? A variable defined outside any functions in main script body is called global variable. However, a global variable is not really accessible globally any in the script. The scope of global variable is limited to all statements outsid... 2016-12-08, 1128👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.