How do I use PHP namespaces with autoload

Question

I get this error when I try to use autoload and namespaces      Fatal error  Class  Class1  not found in  usr local www apache22 data public php5 3 test php on line 10   Can anyone tell me what I am doing wrong   Here is my code   Class1 php    lt  php  namespace Person Barnes David       class Class1               public function   construct                         echo   CLASS                         gt    test php    lt  php  function   autoload  class        require  class     php      use Person Barnes David    class   new Class1       gt

User · Answer

lt  php spl autoload register function   classname         for security purpose      your class name should match the name of your class  file php      classname   str replace            classname      require once   DIR   DIRECTORY SEPARATOR   classes  classname class php        try      new   new Class1      catch  Exception  e       echo  error       e- gt getMessage        gt

User · Answer

I see that the autoload functions only receive the  full  classname - with all the namespaces preceeding it - in the following two cases    a   a   new The Full Namespace CoolClass      b  use The Full Namespace as SomeNamespace   at the top of your source file  followed by  a   new SomeNamespace CoolClass      I see that the autoload functions DO NOT receive the full classname in the following case    c  use The Full Namespace   at the top of your source file  followed by  a   new CoolClass      UPDATE   c  is a mistake and isn t how namespaces work anyway  I can report that  instead of  c   the following two cases also work well    d  use The Full Namespace   at the top of your source file  followed by  a   new Namespace CoolClass      e  use The Full Namespace CoolClass   at the top of your source file  followed by  a   new CoolClass      Hope this helps

User · Answer

I found this gem from Flysystem  spl autoload register function  class         prefix    League  Flysystem          if     substr  class  0  17       prefix            return              class   substr  class  strlen  prefix         location     DIR      path to flysystem src     str replace             class      php        if  is file  location             require once  location

User · Answer

I use this simple hack in one line   spl autoload register function  name           require once  lib   str replace           name    php

User · Answer

I ll throw in my two cents for relative beginners or whatnot wanting a simple spl autoload register   setup without all the theory  Just create one php file for each class  name that php file the same as your class name  and keep your class files in the same directory as your php file in question  then this will work   spl autoload register function   class name        require once dirname   FILE      DIRECTORY SEPARATOR    class name     php         Googling the pieces inside this function should answer how it works  PS  I use Linux  and this works on Linux  Windows folks should test it out first

User · Answer

I do something like this  See this GitHub Example  spl autoload register  AutoLoader     function AutoLoader  className         file   str replace      DIRECTORY SEPARATOR  className        require once  classes    DIRECTORY SEPARATOR    file     php          Make your own path  Might need to use Magics like    DIR

User · Answer

I recently found tanerkuc s answer very helpful   Just wanted to add that using strrpos     substr   is slightly faster than explode     end     spl autoload register  function   class          pos   strrpos   class              include    pos     false    class   substr   class   pos   1       php

User · Answer

https   thomashunter name blog simple-php-namespace-friendly-autoloader-class  You   ll want to put your class files into a folder named Classes  which is in the same directory as the entry point into your PHP application  If classes use namespaces  the namespaces will be converted into the directory structure  Unlike a lot of other auto-loaders  underscores will not be converted into directory structures  it   s tricky to do PHP  lt  5 3 pseudo namespaces along with PHP  gt   5 3 real namespaces    lt  php class Autoloader       static public function loader  className             filename    quot Classes  quot    str replace  quot    quot         className     quot  php quot           if  file exists  filename                 include  filename               if  class exists  className                     return TRUE                                  return FALSE          spl autoload register  Autoloader  loader     You   ll want to place the following code into your main PHP script  entry point   require once  quot Classes Autoloader php quot     Here   s an example directory layout  index php Classes    Autoloader php   ClassA php - class ClassA      ClassB php - class ClassB      Business      ClassC php - namespace Business  classC        Deeper        ClassD php - namespace Business Deeper  classD

User · Answer

Using has a gotcha  while it is by far the fastest method  it also expects all of your filenames to be lowercase   spl autoload extensions   php    spl autoload register      For example   A file containing the class SomeSuperClass would need to be named somesuperclass php  this is a gotcha when using a case sensitive filesystem like Linux  if your file is named SomeSuperClass php but not a problem under Windows   Using   autoload in your code may still work with current versions of PHP but expect this feature to become deprecated and finally removed in the future   So what options are left   This version will work with PHP 5 3 and above and allows for filenames SomeSuperClass php and somesuperclass php  If your using 5 3 2 and above  this autoloader will work even faster    lt  php  if   function exists    stream resolve include path       false         function stream resolve include path    filename              paths   explode   PATH SEPARATOR  get include path               foreach    paths as  path                  path   realpath    path   PATH SEPARATOR    filename                if    path                     return  path                                  return false           spl autoload register   function    className   fileExtensions   null          className   str replace              className         className   str replace               className         file   stream resolve include path    className     php         if    file     false              file   stream resolve include path   strtolower    className     php                 if    file     false             include  file          return true            return false

User · Answer

had the same issue and just found this    When you create a subfolder structure matching the namespaces of the containing classes  you will never even have to define an autoloader       spl autoload extensions   php       comma-separated list     spl autoload register      It worked like a charm  More info here   http   www php net manual en function spl-autoload-register php 92514  EDIT  this causes problem on Linux because of backslash    See here for working solution by imme  mosol  Namespace Autoload works under windows  but not on Linux

User · Answer

Class1 is not in the global scope   See below for a working example    lt  php  function   autoload  class         parts   explode        class       require end  parts      php      use Person Barnes David as MyPerson    class   new MyPerson Class1      Edit  2009-12-14    Just to clarify  my usage of  use     as  was to simplify the example   The alternative was the following    class   new Person Barnes David Class1      or  use Person Barnes David Class1            class   new Class1

User · Answer

As mentioned Pascal MARTIN  you should replace the     with DIRECTORY SEPARATOR for example    filename   BASE PATH   DIRECTORY SEPARATOR   str replace       DIRECTORY SEPARATOR   class      php   include  filename     Also I would suggest you to reorganize the dirrectory structure  to make the code more readable  This could be an alternative   Directory structure   ProjectRoot   - lib   File   ProjectRoot lib Person Barnes David Class1 php   lt  php namespace Person Barnes David class Class1       public function   construct                 echo   CLASS              gt     Make the sub directory for each namespace you are defined    File   ProjectRoot test php  define  BASE PATH   realpath dirname   FILE       function my autoloader  class         filename   BASE PATH     lib     str replace             class      php       include  filename     spl autoload register  my autoloader     use Person Barnes David as MyPerson   class   new MyPerson Class1       I used php 5 recomendation for autoloader declaration  If you are still with PHP 4  replace it with the old syntax  function   autoload  class

User · Answer

Your   autoload function will receive the full class-name  including the namespace name   This means  in your case  the   autoload function will receive  Person Barnes David Class1   and not only  Class1    So  you have to modify your autoloading code  to deal with that kind of  more-complicated  name   a solution often used is to organize your files using one level of directory per  level  of namespaces  and  when autoloading  replace     in the namespace name by DIRECTORY SEPARATOR

[php] How do I use PHP namespaces with autoload?

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