PHP扩展开发-简单类扩展

今天来学习简单类扩展开发

实现目标为如下php的类

<?php
class classext(){

    private $username;

    CONST URL="http://www.google.com";

    public function __construct(){}

    public function getName(){
        return $this->username;
    } 

    public function setName($name){
        $this->username=$name;
    }

    public function __destruct(){}

}

?>

1.先使用./ext_skel --extname=classext创建扩展框架

2.在php_classext.h中添加声明成员变量,代码如下

PHP_METHOD(classext,__construct);
PHP_METHOD(classext,__destruct);
PHP_METHOD(classext,getName);
PHP_METHOD(classext,setName);

3.在classext.c中添加相应的函数,我把所有代码贴出来大家参考

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "php_classext.h"


static int le_classext;

zend_class_entry *classext_ce;
 
/* 类方法的参数 */
ZEND_BEGIN_ARG_INFO(setName_args, 0)
    ZEND_ARG_INFO(0, name)
ZEND_END_ARG_INFO()



PHP_METHOD(classext,__construct){

}

PHP_METHOD(classext,__destruct){

}

PHP_METHOD(classext,getName){
    zval *self,*name;
    self = getThis();
    name = zend_read_property(Z_OBJCE_P(self),self,ZEND_STRL("username"),0 TSRMLS_CC);

    RETURN_STRING(Z_STRVAL_P(name),0);
}

PHP_METHOD(classext, setName) {
    char *arg = NULL;
    int arg_len;
    zval *value, *self;
 
    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &arg, &arg_len) == FAILURE) {
        WRONG_PARAM_COUNT;
    }
 
    self = getThis();
 
    MAKE_STD_ZVAL(value);
    ZVAL_STRINGL(value, arg, arg_len, 0);
 
    SEPARATE_ZVAL_TO_MAKE_IS_REF(&value);
    zend_update_property(Z_OBJCE_P(self), self, ZEND_STRL("username"), value TSRMLS_CC);
 
    RETURN_TRUE;
}

const zend_function_entry classext_functions[] = {    
    PHP_ME(classext, __construct,     NULL,             ZEND_ACC_PUBLIC|ZEND_ACC_CTOR) 
    PHP_ME(classext, __destruct,      NULL,             ZEND_ACC_PUBLIC|ZEND_ACC_DTOR) 
    PHP_ME(classext, getName,          NULL,             ZEND_ACC_PUBLIC) 
    PHP_ME(classext, setName,          setName_args,     ZEND_ACC_PUBLIC) 
    {NULL, NULL, NULL}    /* Must be the last line in martin_functions[] */
};

PHP_MINIT_FUNCTION(classext)
{
    zend_class_entry classext;
    INIT_CLASS_ENTRY(classext, "Classext", classext_functions);
    classext_ce = zend_register_internal_class_ex(&classext, NULL, NULL TSRMLS_CC);
    /* 声明常量URL */
    zend_declare_class_constant_stringl(classext_ce, ZEND_STRL("URL"), ZEND_STRL("http://www.google.com") TSRMLS_CC);
    /* 声明私有成员变量 username
    ZEND_STRL("username")等价于"username",sizeof("username")-1;详见zend.h */
    zend_declare_property_null(classext_ce, ZEND_STRL("username"), ZEND_ACC_PRIVATE TSRMLS_CC);

    return SUCCESS;
}

PHP_MSHUTDOWN_FUNCTION(classext)
{
    return SUCCESS;
}

PHP_RINIT_FUNCTION(classext)
{
    return SUCCESS;
}

PHP_RSHUTDOWN_FUNCTION(classext)
{
    return SUCCESS;
}

PHP_MINFO_FUNCTION(classext)
{
    php_info_print_table_start();
    php_info_print_table_header(2, "classext support", "enabled");
    php_info_print_table_header(2, "The Version", "1.0.2");
    php_info_print_table_end();
}

zend_module_entry classext_module_entry = {
    STANDARD_MODULE_HEADER,
    "classext",
    NULL,
    PHP_MINIT(classext),
    PHP_MSHUTDOWN(classext),
    PHP_RINIT(classext),        
    PHP_RSHUTDOWN(classext),    
    PHP_MINFO(classext),
    PHP_CLASSEXT_VERSION,
    STANDARD_MODULE_PROPERTIES
};


#ifdef COMPILE_DL_CLASSEXT
ZEND_GET_MODULE(classext)
#endif

4.编译扩展；ps：记得把config.m4中的第10,12行dnl删掉

5.重启php环境，加载相应的扩展后，我们在php脚本中执行

<?php
 $class = new classext();
 $class->setName("xiaozong");
 echo $class->getName();
?>

输出:xiaozong