Examples of PHP function overloading techniques

php, as a weakly typed language, cannot directly implement overloading like strongly typed languages ​​such as java and c++.

Function overloading can be achieved indirectly through some methods.

1. You can use the two functions func_get_args() and func_num_args() to implement function overloading.
php code:

function rewrite() {
$args = func_get_args();
if(func_num_args() == 1) {
func1($args[0]);
} else if(func_num_args() == 2) {
func2($args[0], $args[1]);
}
} www.jbxue.com
function func1($arg) {
echo $arg;
}
function func2($arg1, $arg2 ) {
echo $arg1, ' ', $arg2;
}
rewrite('PHP'); //Call func1
rewrite('PHP','China'); //Call func2

2. Use the default value to get the results you want based on the input:

function test($name="小李",$age="23"){
echo $name." ".$age;
}

test();
echo "test("a");
echo "";
test("a","b");