get_class_methods

(PHP 4, PHP 5, PHP 7, PHP 8)

get_class_methods返回由类的方法名组成的数组

说明

get_class_methods ( mixed $class_name ) : array

返回由类的方法名组成的数组。

参数

class_name

类名或者对象实例。

返回值

返回由 class_name 指定的类中定义的方法名所组成的数组。如果出错,则返回 null

范例

Example #1 get_class_methods() 示例

<?php

class myclass {
    
// constructor
    
function myclass()
    {
        return(
true);
    }

    
// method 1
    
function myfunc1()
    {
        return(
true);
    }

    
// method 2
    
function myfunc2()
    {
        return(
true);
    }
}

$class_methods get_class_methods('myclass');
// or
$class_methods get_class_methods(new myclass());

foreach (
$class_methods as $method_name) {
    echo 
"$method_name\n";
}

?>

以上例程会输出:

myclass
myfunc1
myfunc2

参见

User Contributed Notes

iarias at loyalia dot es 21-Feb-2018 12:19
If you only need the methods declared by the class, and not the parent classes ones, you can do something like:

$declared_methods = array_diff(get_class_methods($class), get_class_methods(get_parent_class($class)));
polarglow06 at gmail dot com 18-Nov-2015 06:09
I have created a very simple test runner using this function

function get_bar($text) {
    $bar = "";
    for($i=1; $i<=strlen($text); $i++) {
        $bar .= "=";
    }
    return $bar;
}
class Tester {
    function __construct() {
        $this->run_tests();
    }
    // run the tests
    function run_tests() {
        print("Tester by Minhajul Anwar \n");
        $class = get_class($this);
        $test_methods = preg_grep('/^test/', get_class_methods($this));
        foreach($test_methods as $method) {
            $start_rep = "test: $class::$method";
            $bar = get_bar($start_rep);
            print("\n$start_rep\n$bar\n");
            $this->$method();
            print("\n");
        }
    }
}

now you just need to write your test class with tegst methods prefixed by 'test', and then just instantiate object of that test class of your, all those tests methods will get run automatically
The drawback is: your test methods must not accept any arguments

an example:
require '../autoload.php';
register_autoload_paths(realpath('./'));

class Test_Test extends Tester {
    function test_something() {
        print("method got executed");
    }
    function testAnotherThing() {
    print("another test method");
    }
}

$Test = new Test_Test();
fschmengler at sgh-it dot eu 08-Jan-2010 04:40
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)
php at stock-consulting dot com 06-Feb-2007 02:40
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 :-)
BoD 15-Mar-2006 07:09
!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
jazepstein at greenash dot net dot au 16-Oct-2005 06:37
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);
}
?>
Oli Filth 11-Apr-2005 08:21
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;
}
?>
kabatak 20-Feb-2005 05:11
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;
}
epowell at removethis dot visi dot com 11-Oct-2004 08:47
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;
}
?>
onesimus at cox dot net 19-Jun-2004 02:32
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);
}
gk at proliberty dot com 01-Jun-2003 04:16
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.
aldo at cerca dot com 21-Apr-2002 10:18
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();
matt at zevi dot net 21-Mar-2002 04:46
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