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    get_declared_classes

    (PHP 4, PHP 5, PHP 7)

    get_declared_classes — 선언된 클래스명을 배열로 반환

    설명

    array get_declared_classes ( void )

    선언된 클래스를 얻습니다.

    반환값

    현재 스크립트에서 선언된 클래스명을 배열로 반환한다.

    Note:

    PHP 4.0.1에서는 배열의 첫부분에 세개의 클래스들이 들어가 있다: stdClass (Zend/zend.c에 정의되어있는 클래스), OverloadedTestClass (ext/standard/basic_functions.c에 정의되어있는 클래스), Directory (ext/standard/dir.c에 정의되어있는 클래스)

    PHP에 컴파일되거나 적재된 확장이 추가적인 클래스를 가질 수 있는 점에 주의하십시오. 이말의 의미는 그 이름을 사용하는 사용자 선언 클래스를 선언할수 없다는 것이다. 부록의 기선언된 클래스 섹션에서 미리선언된 클래스명 이 있다.

    예제

    Example #1 get_declared_classes() 예제

    <?php
    print_r    (get_declared_classes());
    ?>

    위 예제의 출력 예시:

    Array
(
    [0] => stdClass
    [1] => __PHP_Incomplete_Class
    [2] => Directory
)

    참고

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    User Contributed Notes 10 notes

    up
    1
    Anonymous
    19 years ago
    Regarding note of 3-21:

    <?php

    class myclass {}

    $class = 'myclass';
    $instance = new $class();

    ?>

    This function could also be used to determine the names of classes defined in a particular file by calling it before and after include. It's hardly a pointless function.
    up
    1
    matt-php at DONT-SPAM-ME dot bitdifferent dot com
    20 years ago
    The array returned by this function will be in the order the classes were defined / included / required and this order does not appear to change.

    For example:

    <?PHP

    //define classone
    class classone { }

    //define classtwo
    class classtwo { }

    //This will show X classes (built-ins, extensions etc) with
    //classone and classtwo as the last two elements

    print_r(get_declared_classes());

    //define classthree
    class classthree { }

    //...and four
    class classfour { }

    //Shows the same result as before with class three and four appended
    print_r(get_declared_classes());

    ?>

    Output:

    Array
    (
       [0] => stdClass
       [1] .... other defined classes....
       [10] => classone
       [11] => classtwo
    )

    and...

    Array
    (
       [0] => stdClass
       [1] .... other defined classes....
       [10] => classone
       [11] => classtwo
       [12] => classthree
       [13] => classfour
    )
    up
    0
    rmamdaminov at gmail dot com
    1 year ago
    Note that this function also counts enums.

    <?php

    enum Bla
    {
        case     Foo;
    }

    var_dump(get_declared_classes());
    ?>

    Result:
    array(116) {
        ...
        [115]=> string(3) "Bla"
    }
    up
    -2
    dexen + goofy _ pl
    17 years ago
    Summary:
    * in PHP 5.1 class names have case preserved
    * contrary, in PHP 4.4 class names are downcased, withe exception of a few build-in ones

    The get_declared_classes() funcition returns the list of names with case preserved, as of PHP 5.1 series (prolly 5.0 too, but i have no way to test it right now). Since PHP generally is caseless in regard to names of classes, this may come at a surprise. Also, this could potentially break older code asssuming downcased list.

    Take extra care when  checking for existence of a class. Following example is, potentially, error prone: <?php in_array( $className, $classget_declared_classes() ) ?>

    A sure-fire (while slower) way would be to iterate over the array and normalize case to, say, lower:

    <?php
    $exists     = FALSE;
    $className = strtolower( $className );
    foreach (     get_declared_classes() as $c ) {
        if (     $className === strtolower( $c ) ) {
                $exists = TRUE;
            break;
        }
    }    ?>

    Optimization of the above snippet is left as a simple excercise to the reader ;)
    -- dexen deVries
    up
    -4
    brain at code dot com
    10 years ago
    get-declared-classes makes no sense at all, if u maybe, later for production, merge class files in one package file.

    lets say: package.php
    print_r(get_declared_classes());
    class declaredHere { }
    print_r(get_declared_classes());

    so in this case, the declaredHerr class is defined at the first call of print_r();
    because PHP-complier runs a hole file and declare Stuff before running the code.

    But (Lovely PHP):
    print_r(get_declared_classes());
    if(true){
    class declaredHere { }
    }
    print_r(get_declared_classes());
    Will print the declaredHere class only in the second print_r.

    Its not a Bug it a...
    up
    -3
    smokey
    21 years ago
    you cannot remove them. they are "defined", which happens when the class is being loaded from the parser. you just deleted an instance of a class.
    up
    -3
    matt at mattsoft dot net
    19 years ago
    classes can't be unloaded. probably not very practical to implement that in a future version. I wouldn't go out of my way to do it if I were zend. you're better off finding a workaround. it's better programming technique to find a way around having to do that anyway.

    http://www.zend.com/zend/week/week223.php#Heading10
    up
    -5
    dcahh at gmx de
    16 years ago
    This function considers only classes and subclasses. Not subsubclasses.

    In fact I have code that provides an abstract class and then classes using this abstract class. Further I have subclasses to my concrete classes - which is why my subclasses are not listed within the returned array.
    up
    -6
    Jazeps Basko
    20 years ago
    In PHP5, you don't get declared interfaces by calling this function!!!
    To get interfaces you should use get_declared_interfaces(). However, to check if an interface is already defined, you should use class_exists()! This is strange, but PHP team does not think so.
    up
    -11
    yarco dot wang at gmail dot com
    11 years ago
    those above comments are too old.
    now, whatever the order is, the output will be the same:

    <?php
    class Test1
    {}

    print_r(get_declared_classes());

    class     Test2
    {}

    print_r(get_declared_classes());

    ?>

    will output the same result.
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