<?php
/*******************************
* author : hishamdalal@gmail.com
* version : 3.8
* create on : 2017-09-17
* updated on : 2020-01-12
* download example: https://github.com/hishamdalal/overloadable
*****************************/
#> 1. Include Overloadable class
class Overloadable
{
static function call($obj, $method, $params=null) {
$class = get_class($obj);
// Get real method name
$suffix_method_name = $method.self::getMethodSuffix($method, $params);
if (method_exists($obj, $suffix_method_name)) {
// Call method
return call_user_func_array(array($obj, $suffix_method_name), $params);
}else{
throw new Exception('Tried to call unknown method '.$class.'::'.$suffix_method_name);
}
}
static function getMethodSuffix($method, $params_ary=array()) {
$c = '__';
if(is_array($params_ary)){
foreach($params_ary as $i=>$param){
// Adding special characters to the end of method name
switch(gettype($param)){
case 'array': $c .= 'a'; break;
case 'boolean': $c .= 'b'; break;
case 'double': $c .= 'd'; break;
case 'integer': $c .= 'i'; break;
case 'NULL': $c .= 'n'; break;
case 'object':
// Support closure parameter
if($param instanceof Closure ){
$c .= 'c';
}else{
$c .= 'o';
}
break;
case 'resource': $c .= 'r'; break;
case 'string': $c .= 's'; break;
case 'unknown type':$c .= 'u'; break;
}
}
}
return $c;
}
// Get a reference variable by name
static function &refAccess($var_name) {
$r =& $GLOBALS["$var_name"];
return $r;
}
}
//----------------------------------------------------------
#> 2. create new class
//----------------------------------------------------------
class test
{
private $name = 'test-1';
#> 3. Add __call 'magic method' to your class
// Call Overloadable class
// you must copy this method in your class to activate overloading
function __call($method, $args) {
return Overloadable::call($this, $method, $args);
}
#> 4. Add your methods with __ and arg type as one letter ie:(__i, __s, __is) and so on.
#> methodname__i = methodname($integer)
#> methodname__s = methodname($string)
#> methodname__is = methodname($integer, $string)
// func(void)
function func__() {
pre('func(void)', __function__);
}
// func(integer)
function func__i($int) {
pre('func(integer '.$int.')', __function__);
}
// func(string)
function func__s($string) {
pre('func(string '.$string.')', __function__);
}
// func(string, object)
function func__so($string, $object) {
pre('func(string '.$string.', '.print_r($object, 1).')', __function__);
//pre($object, 'Object: ');
}
// func(closure)
function func__c(Closure $callback) {
pre("func(".
print_r(
array( $callback, $callback($this->name) ),
1
).");", __function__.'(Closure)'
);
}
// anotherFunction(array)
function anotherFunction__a($array) {
pre('anotherFunction('.print_r($array, 1).')', __function__);
$array[0]++; // change the reference value
$array['val']++; // change the reference value
}
// anotherFunction(string)
function anotherFunction__s($key) {
pre('anotherFunction(string '.$key.')', __function__);
// Get a reference
$a2 =& Overloadable::refAccess($key); // $a2 =& $GLOBALS['val'];
$a2 *= 3; // change the reference value
}
}
//----------------------------------------------------------
// Some data to work with:
$val = 10;
class obj {
private $x=10;
}
//----------------------------------------------------------
#> 5. create your object
// Start
$t = new test;
#> 6. Call your method
// Call first method with no args:
$t->func();
// Output: func(void)
$t->func($val);
// Output: func(integer 10)
$t->func("hello");
// Output: func(string hello)
$t->func("str", new obj());
/* Output:
func(string str, obj Object
(
[x:obj:private] => 10
)
)
*/
// call method with closure function
$t->func(function($n){
return strtoupper($n);
});
/* Output:
func(Array
(
[0] => Closure Object
(
[parameter] => Array
(
[$n] =>
)
)
[1] => TEST-1
)
);
*/
## Passing by Reference:
echo '<br><br>$val='.$val;
// Output: $val=10
$t->anotherFunction(array(&$val, 'val'=>&$val));
/* Output:
anotherFunction(Array
(
[0] => 10
[val] => 10
)
)
*/
echo 'Result: $val='.$val;
// Output: $val=12
$t->anotherFunction('val');
// Output: anotherFunction(string val)
echo 'Result: $val='.$val;
// Output: $val=36
// Helper function
//----------------------------------------------------------
function pre($mixed, $title=null){
$output = "<fieldset>";
$output .= $title ? "<legend><h2>$title</h2></legend>" : "";
$output .= '<pre>'. print_r($mixed, 1). '</pre>';
$output .= "</fieldset>";
echo $output;
}
//----------------------------------------------------------