PHP 5.6.0RC3 is available

get_class_methods

(PHP 4, PHP 5)

get_class_methodsRestituisce un array con i nomi dei metodi della classe

Descrizione

array get_class_methods ( string $nome_classe )

Questa funzione restituisce un array contenente i nomi dei metodi definiti per la classe specificata da nome_classe.

Nota:

Dalla versione 4.0.6 di PHP, si può specificare direttamente l'oggetto anziché la classe nel parametro nome_classe. Ad esempio:

<?php
$metodi_della_classe 
get_class_methods($mia_classe); // vedere di seguito l'esempio completo
?>

Example #1 Esempio di get_class_methods()

<?php

class miaclasse {
    
// costruttore
    
function miaclasse()
    {
        return(
true);
    }
    
    
// metodo 1
    
function funzione1() 
    {
        return(
true);
    }

    
// metodo 2
    
function funzione2() 
    {
        return(
true);
    }
}

$mio_oggetto = new miaclasse();

$metodi get_class_methods(get_class($mio_oggetto));

foreach (
$metodi as $nome_metodo) {
    echo 
"$nome_metodo\n";
}

?>

Il precedente esempio visualizzerà:

miaclasse
funzione1
funzione2

Avviso

Dal PHP 5, questa funzione restituisce il nome dei metodi così come sono dichiarati (sensibile alle maiuscole). In PHP 4 erano restituiti in minuscolo.

Vedere anche get_class_vars() e get_object_vars()

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User Contributed Notes 11 notes

up
6
fschmengler at sgh-it dot eu
4 years ago
It should be noted that the returned methods are dependant on the current scope. See this example:

<?php
class C
{
    private function
privateMethod()
    {
       
    }
    public function
publicMethod()
    {
       
    }
    public function
__construct()
    {
        echo
'$this:';
       
var_dump(get_class_methods($this));
        echo
'C (inside class):';
       
var_dump(get_class_methods('C'));
    }
}
$c = new C;
echo
'$c:';
var_dump(get_class_methods($c));
echo
'C (outside class):';
var_dump(get_class_methods('C'));
?>

Output:

$this:
array
  0 => string 'privateMethod' (length=13)
  1 => string 'publicMethod' (length=12)
  2 => string '__construct' (length=11)

C (inside class):
array
  0 => string 'privateMethod' (length=13)
  1 => string 'publicMethod' (length=12)
  2 => string '__construct' (length=11)

$c:
array
  0 => string 'publicMethod' (length=12)
  1 => string '__construct' (length=11)

C (outside class):
array
  0 => string 'publicMethod' (length=12)
  1 => string '__construct' (length=11)
up
2
Oli Filth
9 years ago
As an extension to onesimus's code below for finding inherited methods, in PHP 5 you can use the Reflection API to find which of these are overriden.

e.g.

<?php
function get_overriden_methods($class)
{
   
$rClass = new ReflectionClass($class);
   
$array = NULL;
       
    foreach (
$rClass->getMethods() as $rMethod)
    {
        try
        {
           
// attempt to find method in parent class
           
new ReflectionMethod($rClass->getParentClass()->getName(),
                               
$rMethod->getName());
           
// check whether method is explicitly defined in this class
           
if ($rMethod->getDeclaringClass()->getName()
                ==
$rClass->getName())
            {
               
// if so, then it is overriden, so add to array
               
$array[] .=  $rMethod->getName();
            }
        }
        catch (
exception $e)
        {   
/* was not in parent class! */    }
    }
   
    return
$array;
}
?>
up
1
jazepstein at greenash dot net dot au
8 years ago
In PHP4, this function converts its return values to lowercase; but in PHP5, it leaves the return values in their original case. This can cause serious problems when trying to write code that dynamically calls a class method, and that works in both PHP4 and PHP5. This code snippet shows one way of achieving compatibility with both versions:

<?php
// Example variables - these would be dynamic in a real application.
$className = 'SomeClass';
$methodName= 'someMethod';
$args = array('arg1', 'arg2');

// Use array_map() and strtolower() to make all values returned by get_class_methods() lowercase. PHP4 does this anyway - now it will happen regardless of the PHP version being used.
$classMethods = array_map(strtolower, get_class_methods($className));

// in_array() can only handle being given an array.
if (!$classMethods) {
 
$classMethods = array();
}

if (
in_array(strtolower($methodName), $classMethods)) {
 
// call some method
 
return call_user_func_array(array($className, $methodName), $args);
}
?>
up
1
matt at zevi dot net
12 years ago
Win32 only:

It's probably worth noting here that you can't get the methods of an object created by the built-in 'COM' class. ie - this won't work:

$word = new COM('Word.Application');
$methods = get_class_methods(get_class($word));
print_r($methods);

Matt
up
0
kabatak
9 years ago
In PHP4, if you need to get_class_methods in their original case. You can use this simple function I created.

// Note: this function assumes that you only have 1 class in 1 file

$file = "path/to/myclass.php"

function file_get_class_methods ($file)
{
    $arr = file($file);
    foreach ($arr as $line)
    {
        if (ereg ('function ([_A-Za-z0-9]+)', $line, $regs))
            $arr_methods[] = $regs[1];
    }
    return $arr_methods;
}
up
0
onesimus at cox dot net
10 years ago
This function will return only the methods for the object you indicate. It will strip out the inherited methods.

function get_this_class_methods($class){
    $array1 = get_class_methods($class);
    if($parent_class = get_parent_class($class)){
        $array2 = get_class_methods($parent_class);
        $array3 = array_diff($array1, $array2);
    }else{
        $array3 = $array1;
    }
    return($array3);
}
up
0
gk at proliberty dot com
11 years ago
It is important to note that get_class_methods($class) returns not only methods defined by $class but also the inherited methods.

There does not appear to be any PHP function to determine which methods are inherited and which are defined explicitly by a class.
up
0
aldo at cerca dot com
12 years ago
If you use "get_class_methods" to check if a Method is in a Class remember that the function return lowered name of class methods:

class classPippo
{
        function DummyFunct()
        {
                // Do nothing...
        }
}

$aClassMethods = get_class_methods(classPippo);

$sMethodName = 'DummyFunct';

// This not work...

        if (in_array($sMethodName, $aClassMethods))
        classPippo::DummyFunct();

// This work...

        if (in_array(strtolower($sMethodName), $aClassMethods))
        classPippo::DummyFunct();
up
-1
epowell at removethis dot visi dot com
9 years ago
I've figured out how to get around my issue described below, using the Reflection API.

<?
/* Pass the name of the class, not a declared handler */
function get_public_methods($className) {
    /* Init the return array */
    $returnArray = array();

    /* Iterate through each method in the class */
    foreach (get_class_methods($className) as $method) {

        /* Get a reflection object for the class method */
        $reflect = new ReflectionMethod($className, $method);

        /* For private, use isPrivate().  For protected, use isProtected() */
        /* See the Reflection API documentation for more definitions */
        if($reflect->isPublic()) {
            /* The method is one we're looking for, push it onto the return array */
            array_push($returnArray,$method);
        }
    }

    /* return the array to the caller */
    return $returnArray;
}
?>
up
-2
BoD
8 years ago
!Concerning PHP5 Only!

If you want to get all methods/functions from a class you can do this with the get_class_methods function.
<?php
    $arrMethodNames
= get_class_methods ( $ClassNameOrObject);
?>
However the drawback on this function in PHP5 is that you will NOT receive protected and private methods of a class/object if you are calling the method from another class/object context.

If you want to receive all methods of a given Class in another Class you should use the PHP5 Reflection API. The following source allows to retrieve all methods from a derived class in its (abstract) Base Class.

In the example you need to call the base constructor from the derived classes constructor in order to let the base class know the name of the derived class. Use the "__CLASS__" definition for passing the classname of current class to its base class.

<?php

   
// Base Class - Abstract
   
abstract class A {
       
       
// Array of ReflectionMethod Objects
        // is being set upon instanciation
        // derived Classes don't need to know about this array
       
private $arrMethods;
               
       
// Constructor which MUST be called from derived Class Constructor
       
protected function __construct ( $strDerivedClassName ) {
           
$oRefl = new ReflectionClass ( $strDerivedClassName );
            if (
is_object($oRefl) ) {
               
$this->arrMethods = $oRefl->getMethods();
            }
        }
       
       
// Some abstract function
       
abstract protected function D ();
       
       
// Some private function
       
private function E() {
        }
       
       
// method to print all class/object methods
        // must be callable from derived classes
        // can be protected if only for internal class use
       
public function PrintAllMethods () {
            foreach (
$this->arrMethods as $curReflectionMethod ) {
                echo
$curReflectionMethod->getName()."<br>";
            }
        }
    }
   
   
   
// Derived Class
   
class B extends A {
       
       
// Constructor for this class
        // MUST call Base Constructor
       
public function __construct () {
           
// Call Base Constructor
           
parent::__construct(__CLASS__);
        }
       
       
       
// Some public function
       
public function A () {
        }
       
       
// some protected function
       
protected function B () {
        }
       
       
// some private function
       
private function C() {
        }
       
       
// some abstract method from base class implemented
       
protected function D () {
        }
    }
   
   
   
// Create new B Object
   
$b = new B();
   
// Print all Methods of this Object/Class
   
$b->PrintAllMethods();
?>

In this example output will be:

__construct
A
B
C
D
E
PrintAllMethods

As you can see these are all methods from class B and also all methods from Class A respectivly in order of their declaration. Note that only one method "__construct" and only one method "D" are being shown. This is due to overloading (__construct) and implementing (D) in PHP.

In this example any further method-handling methods should be implemented in the base class as these will be available in derived classes as well. Just make sure that you use the right access specifiers for these additional methods ( private, protected, public )

BoD
up
-1
php at stock-consulting dot com
7 years ago
Note that this function will answer both class AND instance methods ("class methods" are called "static" in PHP). Sort of a little "trap" for people who have in-depth experience with the OO terminology :-)
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