Phalcon Class Autoloader

by Online Tutorials Library July 14, 2022

Phalcon Class Autoloader

Loader is a class found under PhalconLoader directory. This class consists of some pre-defined rules according to rules it loads class automatically. It also handles error such as if a class does not exist but it is called in any part of program then special handler is called for handling.

In Loader if a class is added according to its need in program, performance is increased as only specific file is included. This technique is known as lazy initialization.

PhalconLoader have 4 methods to implement auto load classes:

Registering Namespaces
Registering Directories
Registering Classes
Registering Files

Registering Namespaces

This method is invoked when our code is organized using namespace or external libraries.

Syntax:

registerNamespaces() method.

It takes an associative array, where keys are namespace prefix and their values are directories of their class location. Now, when the loader tries to find the class namespace separator is replaced by their directory separator.

Note: Always add trailing slash at end of the paths.

Implementation

  <?php    use PhalconLoader;    // Creates the autoloader  $loader = new Loader();    // Register some namespaces  $loader->registerNamespaces(      [         ‘ExampleBase’    => ‘vendor/example/base/’,         ‘ExampleAdapter’ => ‘vendor/example/adapter/’,         ‘Example’         => ‘vendor/example/’,      ]  );  // Register autoloader  $loader->register();  // The required class will automatically include the  // file vendor/example/adapter/tutoraspire.php  $tutoraspire = new ExampleAdapter tutoraspire ();  ?>  

Registering Directories

In this method, classes are under the register directories. This process is not performance effective as file stats increases for computing.

Implementation

  <?php    use PhalconLoader;    // Creates the autoloader  $loader = new Loader();    // Register some directories  $loader->registerDirs(      [          ‘library/MyComponent/’,          ‘library/OtherComponent/Other/’,          ‘vendor/example/adapters/’,          ‘vendor/example/’,      ]  );    // Register autoloader  $loader->register();    // The required class will automatically include the file from  // the first directory where it has been located  // i.e. library/OtherComponent/Other/tutoraspire.php  $tutoraspire = new tutoraspire();  ?>  

Registering Classes

This method is used when project is placed in folder convention become ineffective for accessing files using class and path. It is the fastest method of auto loading but not recommended as maintenance cost is high.

Implementation

  <?php    use PhalconLoader;    // Creates the autoloader  $loader = new Loader();    // Register some classes  $loader->registerClasses(      [          ‘Some’         => ‘library/OtherComponent/Other/Some.php’,          ‘ExampleBase’ => ‘vendor/example/adapters/Example/BaseClass.php’,      ]  );    // Register autoloader  $loader->register();    // Requiring a class will automatically include the file it references  // in the associative array  // i.e. library/OtherComponent/Other/tutoraspire.php  $tutoraspire = new tutoraspire();  ?>  

Registering Files

This method is used for registering files that are non-classes. To register files we uses require. This method is very useful when files only have functions.

Implementation

  <?php    use PhalconLoader;    // Creates the autoloader  $loader = new Loader();    // Register some classes  $loader->registerFiles(      [          ‘functions.php’,          ‘arrayFunctions.php’,      ]  );    // Register autoloader  $loader->register();    ?>  

Next TopicPhalcon Logging

Phalcon Class Autoloader

Phalcon Class Autoloader

Registering Namespaces

Note: Always add trailing slash at end of the paths.

Implementation

Registering Directories

Implementation

Registering Classes

Implementation

Registering Files

Implementation

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