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($arg=expression){}. Here is a PHP script on how to specify default values to arguments:<?phpfunction printKey($key="download") { print("PHP $key\n");}printKey();printKey("hosting");print("\n");?>This script will print:PHP downloadPHP hosting PHP
Topic: Functions
How To Specify Argument Default Values?
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