PHP website instance analysis

? Phpif (version_compare (PHP_VERSION, '5. 000000', '') {// version earlier than 5.0.0die ('thinkphp1. * require_oncePHP5.0! '); // Prompt and terminate} // record start time PHP100 comments $ GLOBALS [' _ inintime']

If (version_compare (PHP_VERSION, '5. 0.0 ',' <') {// version earlier than 5.0.0
Die ('thinkphp 1. * require_once PHP> 5.0! '); // Prompt and terminate
}
// Record start time PHP100 comments
$ GLOBALS ['_ inintime'] = microtime (TRUE );

// The global variable TRUE indicates the addition of seconds and microseconds.

 

// ThinkPHP system directory definition
If (! Defined ('think _ path') define ('think _ path', dirname (_ FILE __));

// The value of THINK_PATH is d: \ www_4000 \ Think_path

 

// Dirname (_ FILE _); the directory name on the top of the FILE is obtained.
// Dirname (_ FILE _); the directory name of the FILE layer is obtained.

 

If (! Defined ('app _ name') define ('app _ name', md5 (THINK_PATH ));
// If no constant APP_NAME exists, encrypt the application name (PHP100)

 

If (! Defined ('app _ path') define ('app _ path', dirname (THINK_PATH). '/'. APP_NAME );

If (! Defined ('runtime _ path') define ('runtime _ path', APP_PATH. '/Temp /');

// Runtime path

 

If (file_exists (RUNTIME_PATH .'~ Runtime. php ')){
// This file is included in the runtime path, and the core cache file of the framework is loaded.
// If the core file is modified, delete the cache (PHP100.com)
Require_once RUNTIME_PATH .'~ Runtime. php ';
} Else {
// Load the system definition file
Require_once THINK_PATH. "/Common/defines. php ";
// System function library
Require_once THINK_PATH. "/Common/functions. php ";
// Load the function file required for compilation
Require_once THINK_PATH. "/Common/runtime. php ";
// The Project Directory structure is automatically created if it does not exist during the first run check.
If (! File_exists (RUNTIME_PATH )){
// Create a project directory structure
BuildAppDir ();
}

// Load the ThinkPHP base class
Import ("Think. Core. Base ");

// Load exception handling class
Import ("Think. Exception. ThinkException ");

// Load the log class
Import ("Think. Util. Log ");

// Load the Think core class
Import ("Think. Core. App ");

Import ("Think. Core. Action ");

Import ("Think. Core. Model ");

Import ("Think. Core. View ");

// Whether to generate the core cache
$ Cache = (! Defined ('cache _ runtime') | CACHE_RUNTIME = true );
If ($ cache ){
If (defined ('strip _ RUNTIME_SPACE ') & STRIP_RUNTIME_SPACE = false ){
$ Fun = 'File _ get_contents ';
} Else {
$ Fun = 'php _ strip_whitespace ';
}
// Generate the cache of the core file and remove the file blank to reduce the size
$ Content = $ fun (THINK_PATH. '/Common/defines. php ');
$ Content. = $ fun (THINK_PATH. '/Common/functions. php ');
$ Content. = $ fun (THINK_PATH. '/Lib/Think/Core/Base. class. php ');
$ Content. = $ fun (THINK_PATH. '/Lib/Think/Exception/ThinkException. class. php ');
$ Content. = $ fun (THINK_PATH. '/Lib/Think/Util/Log. class. php ');
$ Content. = $ fun (THINK_PATH. '/Lib/Think/Core/App. class. php ');
$ Content. = $ fun (THINK_PATH. '/Lib/Think/Core/Action. class. php ');
$ Content. = $ fun (THINK_PATH. '/Lib/Think/Core/Model. class. php ');
$ Content. = $ fun (THINK_PATH. '/Lib/Think/Core/View. class. php ');
}
If (version_compare (PHP_VERSION, '5. 2.0 ',' <')){
// Load compatible functions
Require_once THINK_PATH. '/Common/compat. php ';
If ($ cache ){
$ Content. = $ fun (THINK_PATH. '/Common/compat. php ');
}
}
If ($ cache ){
File_put_contents (RUNTIME_PATH .'~ Runtime. php', $ content); // write a string to a file
Unset ($ content); // destroy $ content
}
}
// Record the file loading time
$ GLOBALS ['_ loadtime'] = microtime (TRUE );
?>