Skip to content

Latest commit

 

History

History
137 lines (105 loc) · 3.77 KB

1-5-2:扩展开发-示例,测试,练习.md

File metadata and controls

137 lines (105 loc) · 3.77 KB
Raw

示例

用PHP实现

<?php
const TEMP_CONVERTER_TO_CELSIUS     = 1;
const TEMP_CONVERTER_TO_FAHREINHEIT = 2;
//华氏转摄氏
function fahrenheit_to_celsius($fahrenheit){
    return 5/9 * ($fahrenheit - 32);
}
//摄氏转华氏
function celsius_to_fahrenheit($celsius){
    return 9/5 * $celsius + 32;
}
//双向转换
function temperature_converter($temp, $type = TEMP_CONVERTER_TO_CELSIUS){
    switch ($type) {
        case TEMP_CONVERTER_TO_CELSIUS:
            return sprintf("华氏 %.2f 度, 摄氏 %.2f 度", $temp, fahrenheit_to_celsius($temp));
        case TEMP_CONVERTER_TO_FAHREINHEIT:
            return sprintf("摄氏 %.2f 度, 华氏 %.2f 度", $temp, celsius_to_fahrenheit($temp));
        default:
            trigger_error("转换模式参数错误, 可接受的转换模式值为 1 或 2", E_USER_WARNING);
        break;
    }
}
//华氏数组批量转摄氏
function multiple_fahrenheit_to_celsius(array $temperatures){
    foreach ($temperatures as $temp) {
        $return[] = fahreinheit_to_celsius($temp);
    }
    return $return;
}

用扩展实现

  1. 生成骨架. ./ext_skel --extname=pib --proto=./pib_proto --no-help

    pib_proto:

    double fahrenheit_to_celsius (double f)
double celsius_to_fahrenheit (double c)
string temperature_converter (double t, long mode)
array multiple_fahrenheit_to_celsius(array temperatures)

  2. 编写代码 : 代码在./code/1-5-2/pib

  3. 编译测试

    编译：

    cd ext/pib
../../../php-7-1-8-install/bin/phpize
./configure --with-php-config=../../../php-7-1-8-install/bin/php-config
make

    运行时配置

    扩展测试

    <?php
echo celsius_to_fahrenheit(35);
echo fahrenheit_to_celsius(95);
echo temperature_converter(95,1);
print_r(multiple_fahrenheit_to_celsius(array(94,69,120)));

//查看扩展的反射信息,等于命令行中执行 php -dextension=pib.so --re pib
//如果不声明参数的话，反射获取不到参数信息
//print_r(ReflectionExtension::export('pib'));

扩展中的常量

/* 常量的数据结构 */
typedef struct _zend_constant {
    zval value;
    zend_string *name;
    int flags;
    int module_number;
} zend_constant;

/* 注册常量的宏: */
/* 注册NULL常量 */
#define REGISTER_NULL_CONSTANT(name, flags)  \
    zend_register_null_constant((name), sizeof(name)-1, (flags), module_number)
/* 注册bool常量 */
#define REGISTER_BOOL_CONSTANT(name, bval, flags)  \
    zend_register_bool_constant((name), sizeof(name)-1, (bval), (flags), module_number)
/* 注册整形常量 */
#define REGISTER_LONG_CONSTANT(name, lval, flags)  \
    zend_register_long_constant((name), sizeof(name)-1, (lval), (flags), module_number)
/* 注册浮点型常量 */
#define REGISTER_DOUBLE_CONSTANT(name, dval, flags)  \
    zend_register_double_constant((name), sizeof(name)-1, (dval), (flags), module_number)
/* 注册字符串常量，str类型为char* */
#define REGISTER_STRING_CONSTANT(name, str, flags)  \
    zend_register_string_constant((name), sizeof(name)-1, (str), (flags), module_number)
/* 注册字符串常量，截取指定长度，str类型为char* */
#define REGISTER_STRINGL_CONSTANT(name, str, len, flags)  \
    zend_register_stringl_constant((name), sizeof(name)-1, (str), (len), (flags), module_number)

TODO::扩展测试脚本的编写

http://qa.php.net/write-test.php

练习

https://github.com/ThomasWeinert/php-extension-sample
https://github.com/Leon2012/php-ext
https://github.com/wzx19840423/php-extension/tree/master/src

跟踪调试扩展

参考资料:

http://www.phpinternalsbook.com/index.html
https://github.com/pangudashu/php7-internal/
https://github.com/tvlooy/php-ext-dev-book