Tools, FAQ, Tutorials:
Variables Are Passed by Values in PHP
How Variables Are Passed Through Arguments? in PHP?
✍: FYIcenter.com
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 function will not impact the original copy. Here is a PHP script on passing variables by values:
<?php function swap($a, $b) { $t = $a; $a = $b; $b = $t; } $x = "PHP"; $y = "JSP"; print("Before swapping: $x, $y\n"); swap($x, $y); print("After swapping: $x, $y\n"); ?>
This script will print:
Before swapping: PHP, JSP After swapping: PHP, JSP
As you can see, original variables were not affected.
⇒ Passing Variables by References in PHP
⇐ Passing an Argument to a Function in PHP
2016-12-24, 1525🔥, 0💬
Popular Posts:
How To Convert a Character to an ASCII Value? If you want to convert characters to ASCII values, you...
How to use the Atom Online Validator at w3.org? w3.org feed validation service is provided at http:/...
How to use the "find-and-replace" Policy Statement for an Azure API service operation? The "find-and...
What validation keywords I can use in JSON Schema to specifically validate JSON Array values? The cu...
How to use the "send-one-way-request" Policy statement to call an extra web service for an Azure API...