How to create default function parameter in PHP?
Last Updated : 28 Apr, 2023
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The default parameter concept comes from C++ style default argument values, same as in PHP you can provide default parameters so that when a parameter is not passed to the function. Then it is still available within the function with a pre-defined value. This function also can be called optional parameter.
Syntax:
function greeting($name=" parameter_value ")
Parameter: This function accepts a single parameter that is $name here, holds the parameter value.
Below examples illustrate the procedure to create and use the default function parameter.
Example 1:
<?php
function greeting($name="GeeksforGeeks")
{
echo "Welcome to $name ";
echo("\n");
}
greeting("Gfg");
// Passing no value
greeting();
greeting("A Computer Science Portal");
?>
Output:
Welcome to Gfg Welcome to GeeksforGeeks Welcome to A Computer Science Portal
Example 2:
<?php
function welcome($first="GeeksforGeeks",
$last="A Computer Science Portal for Geeks")
{
echo "Greeting: $first $last";
echo("\n");
}
welcome();
welcome("night_fury");
welcome("night_fury","Contributor");
?>
Output:
Greeting: GeeksforGeeks A Computer Science Portal for Geeks Greeting: night_fury A Computer Science Portal for Geeks Greeting: night_fury Contributor
