flexloader-autoload
Een voorbeeld autload functie, ook kan je natuurlijk zelf een functie maken die in SPL te hangen valt
Code (php)
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<?php
/**
* Automagic PHP autoload function
*
* @param string $class_name
* @return bool
*/
function __autoload($class_name)
{
static $flexloader = null;
if(!isset($flexloader)) {
$cachepath = './cache/flexloader.cache.php';
$classespath = realpath('./classes');
// Cachefile path, directories to scan, extensions, ignore hidden files, follow symlinks
$flexloader = new FlexLoader($cachepath, array($classespath));
}
return $flexloader->loadClass($class_name);
}
[/code]
[code]
[code]<?php
/**
* FlexLoader
*
* @author Christiaan Baartse <[email protected]>
* @version 0.0.2
* @since 28/02/2008
*/
class FlexLoader {
/**
* Directories to scan
*
* @var array
*/
protected $directories;
/**
* Cache filename
*
* @var string
*/
protected $cache_file;
/**
* Class to file mapping
*
* @var array
*/
protected $class2file;
/**
* Extensions to scan
*
* @var array
*/
protected $extensions;
/**
* Enable scanning of hidden files
*
* @var bool
*/
protected $hidden;
/**
* Enable following of symlinks
*
* @var bool
*/
protected $symlinks;
/**
* Construct
*
* @param string $cache_file
* @param array $directories
* @param array $extensions
* @param bool $hidden
* @param bool $symlinks
*/
public function __construct($cache_file = 'flexloader.cache.php', $directories = array('classes'), $extensions = array('.php'), $hidden = false, $symlinks = true)
{
$this->cache_file = $cache_file;
$this->directories = $directories;
$this->extensions = $extensions;
$this->hidden = $hidden;
$this->symlinks = $symlinks;
if( ! file_exists($this->cache_file) && ! $this->createCache()) {
throw new Exception("FlexLoader: Couldn't create cache '".$this->cache_file."'");
}else{
if(include($this->cache_file)) {
$this->class2file = @$flexloader_classes;
}else{
throw new Exception("FlexLoader: Couldn't load cache from '".$this->cache_file."'");
}
}
}
/**
* Load file containing the given class
*
* @param string $class_name
* @return boolean
*/
public function loadClass($class)
{
$class = strtolower($class);
if(isset($this->class2file[$class]) && include($this->class2file[$class])) {
return TRUE;
}
else{ //Comment out this whole else on production sites
$this->class2file = array();
$this->createCache();
if(isset($this->class2file[$class]) && include($this->class2file[$class])) {
return TRUE;
}
}// So untill here
throw new Exception(__CLASS__." couldn't ".__METHOD__." ".$class);
}
/**
* Create the cachefile
*
* @return bool
*/
public function createCache()
{
foreach($this->directories as $directory) {
$this->parseDirectory($directory.'/');
}
$cache = "<?php\n\$flexloader_classes = ";
$cache.= var_export($this->class2file, true);
$cache.= ';';
file_put_contents($this->cache_file, $cache);
return TRUE;
}
/**
* Parse Directory for files containing classes
*
* @param string $directory Pathname of directory
* @return bool
*/
protected function parseDirectory($directory)
{
if( ! is_dir($directory)) return FALSE;
if( ! $dhandle = opendir($directory)) return FALSE;
while(($file = readdir($dhandle)) !== false) {
if($file[0] == '.' && ! $this->hidden) continue;
$file_path = $directory.$file;
if(is_dir($file_path)){
if($file == '.' || $file == '..') continue;
$this->parseDirectory($file_path.'/');
}elseif($this->symlinks && is_link($file_path)){
$this->parseDirectory($file_path.'/');
}elseif(is_file($file_path)){
if(empty($this->extensions) || in_array(substr($file, strrpos($file, '.')), $this->extensions)) {
preg_match_all('~^\s*(?:abstract\s+|final\s+)?(?:class|interface)\s+(\w+)~mi', file_get_contents($file_path), $result);
if( ! empty($result[1])){
foreach($result[1] as $class_name) {
$this->class2file[strtolower($class_name)] = $file_path;
}
}
}
}
}
return TRUE;
}
}
[/code]
/**
* Automagic PHP autoload function
*
* @param string $class_name
* @return bool
*/
function __autoload($class_name)
{
static $flexloader = null;
if(!isset($flexloader)) {
$cachepath = './cache/flexloader.cache.php';
$classespath = realpath('./classes');
// Cachefile path, directories to scan, extensions, ignore hidden files, follow symlinks
$flexloader = new FlexLoader($cachepath, array($classespath));
}
return $flexloader->loadClass($class_name);
}
[/code]
[code]
[code]<?php
/**
* FlexLoader
*
* @author Christiaan Baartse <[email protected]>
* @version 0.0.2
* @since 28/02/2008
*/
class FlexLoader {
/**
* Directories to scan
*
* @var array
*/
protected $directories;
/**
* Cache filename
*
* @var string
*/
protected $cache_file;
/**
* Class to file mapping
*
* @var array
*/
protected $class2file;
/**
* Extensions to scan
*
* @var array
*/
protected $extensions;
/**
* Enable scanning of hidden files
*
* @var bool
*/
protected $hidden;
/**
* Enable following of symlinks
*
* @var bool
*/
protected $symlinks;
/**
* Construct
*
* @param string $cache_file
* @param array $directories
* @param array $extensions
* @param bool $hidden
* @param bool $symlinks
*/
public function __construct($cache_file = 'flexloader.cache.php', $directories = array('classes'), $extensions = array('.php'), $hidden = false, $symlinks = true)
{
$this->cache_file = $cache_file;
$this->directories = $directories;
$this->extensions = $extensions;
$this->hidden = $hidden;
$this->symlinks = $symlinks;
if( ! file_exists($this->cache_file) && ! $this->createCache()) {
throw new Exception("FlexLoader: Couldn't create cache '".$this->cache_file."'");
}else{
if(include($this->cache_file)) {
$this->class2file = @$flexloader_classes;
}else{
throw new Exception("FlexLoader: Couldn't load cache from '".$this->cache_file."'");
}
}
}
/**
* Load file containing the given class
*
* @param string $class_name
* @return boolean
*/
public function loadClass($class)
{
$class = strtolower($class);
if(isset($this->class2file[$class]) && include($this->class2file[$class])) {
return TRUE;
}
else{ //Comment out this whole else on production sites
$this->class2file = array();
$this->createCache();
if(isset($this->class2file[$class]) && include($this->class2file[$class])) {
return TRUE;
}
}// So untill here
throw new Exception(__CLASS__." couldn't ".__METHOD__." ".$class);
}
/**
* Create the cachefile
*
* @return bool
*/
public function createCache()
{
foreach($this->directories as $directory) {
$this->parseDirectory($directory.'/');
}
$cache = "<?php\n\$flexloader_classes = ";
$cache.= var_export($this->class2file, true);
$cache.= ';';
file_put_contents($this->cache_file, $cache);
return TRUE;
}
/**
* Parse Directory for files containing classes
*
* @param string $directory Pathname of directory
* @return bool
*/
protected function parseDirectory($directory)
{
if( ! is_dir($directory)) return FALSE;
if( ! $dhandle = opendir($directory)) return FALSE;
while(($file = readdir($dhandle)) !== false) {
if($file[0] == '.' && ! $this->hidden) continue;
$file_path = $directory.$file;
if(is_dir($file_path)){
if($file == '.' || $file == '..') continue;
$this->parseDirectory($file_path.'/');
}elseif($this->symlinks && is_link($file_path)){
$this->parseDirectory($file_path.'/');
}elseif(is_file($file_path)){
if(empty($this->extensions) || in_array(substr($file, strrpos($file, '.')), $this->extensions)) {
preg_match_all('~^\s*(?:abstract\s+|final\s+)?(?:class|interface)\s+(\w+)~mi', file_get_contents($file_path), $result);
if( ! empty($result[1])){
foreach($result[1] as $class_name) {
$this->class2file[strtolower($class_name)] = $file_path;
}
}
}
}
}
return TRUE;
}
}
[/code]