Composer autoload not loading base class in parent folder

Question

but, composer DOES autoload same baseclass in the same folder.

My error: Fatal error: Class 'VendorName\ParentFolder\Enums\BasicEnum not found in C:\VendorName\www\src\ParentFolder\Enums\MyEnumeration.php on line 5.

MyEnumeration.php:

<?php
  namespace VendorName\ParentFolder\Enums;


  abstract class MyEnumeration extends BasicEnum {
      const ConstantOne = 1;
      const ConstantTwo = 2;
      const ConstantThree = 3;
}

and BasicEnum.php:

<?php
namespace VendorName\ParentFolder;

abstract class BasicEnum {
    private static $constCacheArray = NULL;

    private function __construct() { }

    private static function getConstants() {
        if (self::$constCacheArray == NULL) {
            self::$constCacheArray = [];
        }
        $calledClass = get_called_class();
        if (!array_key_exists($calledClass, self::$constCacheArray)) {
            $reflect = new ReflectionClass($calledClass);
            self::$constCacheArray[$calledClass] = $reflect->getConstants();
        }
        return self::$constCacheArray[$calledClass];
    }

    public static function isValidName($name, $strict = false) {
        $constants = self::getConstants();

        if ($strict) {
            return array_key_exists($name, $constants);
        }

        $keys = array_map('strtolower', array_keys($constants));
        return in_array(strtolower($name), $keys);
    }

    public static function isValidValue($value, $strict = true) {
        $values = array_values(self::getConstants());
        return in_array($value, $values, $strict);
    }
}

My folder structure:

+ VendorName
  + www
    + src
      + ParentFolder
        + Enums
              MyEnumeration.php
          BasicEnum2.php

And, the autoload is built via:

composer dump-autoload

with composer.json:

{
    "autoload": {
        "psr-4": { "VendorName\\": "src/"}

    }
}

My .php page:

<h1>Composer Autoload Test</h1>
<p>Trying to load a class where base class is in parent folder.
<p>(Using the PHP.net BasicEnum example).
<br/>
<?php
    require __DIR__ . '/vendor/autoload.php';

    use VendorName\ParentFolder;
    use VendorName\ParentFolder\Enums;



    echo '<br/><br/>';
    if (class_exists('MyEnumeration')) {
        echo 'MyEnumeration exists';
    }
    else {
        echo 'MyEnumeration does NOT exist';   // This line prints out in browser.
    }
    echo '<br/><br/>';

    echo '<br/><br/>';
    if (class_exists('VendorName\ParentFolder\Enums\MyEnumeration')) {  // This line blows up because BaseEnum is not found in MyEnumeration.php.
        echo 'VendorName\ParentFolder\Enums\MyEnumeration exists';
    }
    else {
        echo 'VendorName\ParentFolder\Enums\MyEnumeration does NOT exist';
    }
    echo '<br/><br/>';


    echo '<br/><br/>';
    if (defined('VendorName\ParentFolder\Enums\MyEnumeration::ConstantOne')) {
        echo 'VendorName\ParentFolder\Enums\MyEnumeration::ConstantOne exists';
    }
    else {
        echo 'VendorName\ParentFolder\Enums\MyEnumeration::ConstantOne does NOT exist';
    }
    echo '<br/><br/>';  


    echo 'NotExist:' . (MyEnumeration::isValidName('NotExist') ? 'true' : 'false') . '<br/>';
    echo 'ConstantOne:' . (MyEnumeration::isValidName('ConstantOne') ? 'true' : 'false') . '<br/>';
    echo 'ConstantTwo:' . (MyEnumeration::isValidName('ConstantTwo') ? 'true' : 'false') . '<br/>';
    echo 'ConstantThree:' . (MyEnumeration::isValidName('ConstantThree') ? 'true' : 'false') . '<br/>';

?>

Lastly, I have to full qualify the MyEnumeration with the namespace or it's not found even though I've got a 'use' statement and using composer autoload.

I'm a little lost by your folder structure. Which directory is your composer.json in? — Matt Gibson

Matt Gibson Matt Gibson · Accepted Answer · 2017-09-18T22:13:25

Your MyEnumeration class is in the namespace VendorName\ParentFolder\Enums. Hence it cannot find BasicEnum as a symbol as that's in the namespace above, \VendorName\ParentFolder. You can specify it absolutely in your child class:

abstract class MyEnumeration extends \VendorName\ParentFolder\BasicEnum {

You'll also need to indicate the global namespace for ReflectionClass in your BasicEnum:

$reflect = new \ReflectionClass($calledClass);

Note also that you can't just import everything from a namespace using use. You need to use particular classes. For example, in your php page, specify:

use VendorName\ParentFolder\Enums\MyEnumeration;

...to allow the use of MyEnumeration without a qualifier.

Composer autoload not loading base class in parent folder

2 Answers