PHP - Defining an Argument as a Reference in PHP

Defining an Argument as a Reference in PHP

Q

Can You Define an Argument as a Reference Type? in PHP?

✍: FYIcenter.com

A

You can define an argument as a reference type in the function definition. This will automatically convert the calling arguments into references. Here is a PHP script on how to define an argument as a reference type:

<?php
function ref_swap(&$a, &$b) {
  $t = $a; 
  $a = $b;
  $b = $t;
}
$x = "PHP";
$y = "JSP";
print("Before swapping: $x, $y\n");
ref_swap($x, $y);
print("After swapping: $x, $y\n");
?>

This script will print:

Before swapping: PHP, JSP
After swapping: JSP, PHP

⇒Creating Your Own Functions in PHP

⇒⇒PHP Tutorials

2016-12-24, 438👍, 0💬

Passing Arrays to Function in PHP
Can You Pass an Array into a Function? in PHP? You can pass an array into a function in the same as a normal variable. No special syntax needed. Here is a PHP script on how to pass an array to a function: <?php function average($array) { $sum = array_sum($array); $count = count($array); retur... 2016-12-18, 416👍, 0💬

Passing Variables by References in PHP
How To Pass Variables By References? in PHP? You can pass a variable by reference to a function by taking the reference of the original variable, and passing that reference as the calling argument. Here is a PHP script on how to use pass variables by references: <?php function swap($a, $b) { ... 2016-12-24, 392👍, 0💬

Passing Arrays by Values to Functions in PHP
How Arrays Are Passed Through Arguments? in PHP? Like a normal variable, an array is passed through an argument by value, not by reference. That means when an array is passed as an argument, a copy of the array will be passed into the function. Modifying that copy inside the function will not impact... 2016-12-18, 390👍, 0💬

Variables Are Passed by Values in PHP
How Variables Are Passed Through Arguments? in PHP? Like more of other programming languages, variables are passed through arguments by values, not by references. That means when a variable is passed as an argument, a copy of the value will be passed into the function. Modifying that copy inside the... 2016-12-24, 378👍, 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.