类似spl的autoload功能,bloader为php对象的autoload工具,但相比较起来更简单高效,配置也更灵活.
bloader提供一个常用的autoload函数ld,以及两个辅助函数,ld_new(实例化)和ld_unset(销毁对象).
#1 bloader会自动搜索当前文件 或 当前目录下的.class.php文件,以及通过'_MODULES'常量定义的路径,实例化类返回对象.
#2 可直接使用ld('类名')操作对象(见实例 1-1)
#3 bloader会在当前作用域自动注册一个以类名为变量名的变量'$类名'(见实例 1-2)
#4 bloader中使用ld函数访问对象是全局范围有效 (见实例 1-3)
#5 使用ld_new实例化多个不同的对象,而不注册变量 (见实例 1-4)
#6 使用ld_unset注销已经实例化的对象 (见实例 1-5)
下载地址:http://code.google.com/p/bloader/downloads/detail?name=bloader.tar.gz
安装:
phpize
./configure --with-php-config=php-config --enable-bloader
make && make install
实例 1-1
///define('_MODULES',dirname( __FILE__ ).'/class'); ///可选配置,在指定目录下查找类文件,以便于实例化
ld('c1',array('1','2'))->a1="a1"; ///参数2为构造函数的参数
ld('c1')->a2='a2';
ld('c1')->printt();
/**
show:
c1 Object
(
[a1] => a1
[a2] => a2
[a3] => Array
(
[0] => 1
[1] => 2
)
)
*/
?>
/**
example:
./class/c1.class.php:
*/
class c1
{
public $a1=123;
public $a2='abc';
public $a3=100;
public function __construct($ls)
{
$this->a3=$ls;
}
public function printt()
{
print_r(ld('c1')); /**使用了全局特性*/
}
}
?>
实例 1-2
...
ld('users');
//自动注册了$users变量
$users->method();
....
?>
实例 1-3
ld('users');
printt(); //打印对象
...
function printt()
{
var_dump(ld('users'));
}
?>
实例 1-4
$users_1=ld_new('users');
$users_2=ld_new('users');
...
?>
实例 1-5
ld('users');
unset_users();
...
function unset_users()
{
ld_unset('users');
}
?>
奉上主要代码供拍砖
...
PHP_FUNCTION(ld)
{
char *obj_name;
int slen;
zval **var,*para = NULL;
if(zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|z", &obj_name,&slen,¶) != SUCCESS)
{
zend_error(E_ERROR, "parameters failed.");
}
else
{
zval_dtor(return_value);
if(zend_hash_find(&EG(symbol_table),obj_name,slen+1,(void **) &var)!=SUCCESS)
{
ld_autoload_path(obj_name TSRMLS_DC);
*return_value = *ld_new_class(obj_name,slen,para,1);
}
else
{
*return_value = **var;
}
zval_copy_ctor(return_value);
}
}
PHP_FUNCTION(ld_new)
{
char *obj_name;
int slen;
zval *para = NULL;
if(zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|z", &obj_name,&slen,¶) != SUCCESS)
{
zend_error(E_ERROR, "parameters failed.");
}
else
{
zval_dtor(return_value);
ld_autoload_path(obj_name TSRMLS_DC);
*return_value = *ld_new_class(obj_name,slen,para,0);
zval_copy_ctor(return_value);
}
}
PHP_FUNCTION(ld_unset)
{
char *obj_name;
int slen;
if(zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &obj_name,&slen) != SUCCESS)
{
zend_error(E_ERROR, "parameters failed.");
}
else
{
zend_hash_del(&EG(symbol_table),obj_name,slen+1);
RETURN_TRUE;
}
}
/* }}} */
static zval *ld_new_class(char *obj_name,int slen,zval *para,int is_set)
{
zval *obj;
zend_class_entry **class_entry;
zend_function *constructor;
MAKE_STD_ZVAL(obj);
if(zend_lookup_class(obj_name, slen, &class_entry TSRMLS_CC)==SUCCESS)
{
object_init_ex(obj, *class_entry);
constructor = Z_OBJ_HT_P(obj)->get_constructor(obj TSRMLS_CC);
if (constructor != NULL)
{
int is_arg = (para == NULL) ? 0 : 1;
zend_call_method(&obj, *class_entry,&constructor, "__construct", 11, NULL, is_arg, para, NULL TSRMLS_CC);
}
if(is_set==1) ZEND_SET_SYMBOL(&EG(symbol_table),obj_name, obj);
}
else
{
ZVAL_FALSE(obj);
}
return obj;
}
static int ld_autoload_path(char *class_name TSRMLS_DC)
{
char *ext_name = ".class.php";
char *file_path;
zval const_root;
int path_len = spprintf(&file_path, 0, "%s%s",class_name,ext_name);
if(ld_autoload_file(file_path,path_len TSRMLS_DC)==SUCCESS) return SUCCESS;
if(zend_get_constant("_MODULES",8,&const_root TSRMLS_CC))
//if(zend_get_constant_ex("_MODULES",8,const_root,NULL, 0 TSRMLS_CC)) //ZEND_FETCH_CLASS_SILENT
{
if(Z_TYPE(const_root) == IS_STRING)
{
char *root_file_path;
int root_path_len = spprintf(&root_file_path, 0, "%s/%s", Z_STRVAL(const_root),file_path);
return ld_autoload_file(root_file_path,root_path_len TSRMLS_DC);
}
}
return FAILURE;
}
static int ld_autoload_file(char *file_path,int file_path_len TSRMLS_DC) /* {{{ */
{
zend_file_handle file_handle;
if (php_stream_open_for_zend_ex(file_path, &file_handle, ENFORCE_SAFE_MODE|USE_PATH|STREAM_OPEN_FOR_INCLUDE TSRMLS_CC) == SUCCESS)
{
zend_op_array *new_op_array;
unsigned int dummy = 1;
if (!file_handle.opened_path) file_handle.opened_path = estrndup(file_path, file_path_len);
if (zend_hash_add(&EG(included_files), file_handle.opened_path, strlen(file_handle.opened_path)+1, (void *)&dummy, sizeof(int), NULL)==SUCCESS)
{
new_op_array = zend_compile_file(&file_handle, ZEND_REQUIRE TSRMLS_CC);
zend_destroy_file_handle(&file_handle TSRMLS_CC);
}
else
{
new_op_array = NULL;
zend_file_handle_dtor(&file_handle TSRMLS_CC);
}
if (new_op_array)
{
zval *result = NULL;
EG(return_value_ptr_ptr) = &result;
EG(active_op_array) = new_op_array;
if (!EG(active_symbol_table)) zend_rebuild_symbol_table(TSRMLS_C);
zend_execute(new_op_array TSRMLS_CC);
destroy_op_array(new_op_array TSRMLS_CC);
efree(new_op_array);
if (!EG(exception)) if (EG(return_value_ptr_ptr))
zval_ptr_dtor(EG(return_value_ptr_ptr));
}
return SUCCESS;
}
return FAILURE;
}
...

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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