7.7.3 类型转换
最后更新于：2022-04-02 05:18:54
### 7.7.3 类型转换
```c
//将原类型转为特定类型，会更改原来的值
ZEND_API void ZEND_FASTCALL convert_to_long(zval *op);
ZEND_API void ZEND_FASTCALL convert_to_double(zval *op);
ZEND_API void ZEND_FASTCALL convert_to_long_base(zval *op, int base);
ZEND_API void ZEND_FASTCALL convert_to_null(zval *op);
ZEND_API void ZEND_FASTCALL convert_to_boolean(zval *op);
ZEND_API void ZEND_FASTCALL convert_to_array(zval *op);
ZEND_API void ZEND_FASTCALL convert_to_object(zval *op);
#define convert_to_cstring(op) if (Z_TYPE_P(op) != IS_STRING) { _convert_to_cstring((op) ZEND_FILE_LINE_CC); }
#define convert_to_string(op) if (Z_TYPE_P(op) != IS_STRING) { _convert_to_string((op) ZEND_FILE_LINE_CC); }
//获取格式化为long的值，不会更改原来的值，op类型为zval*，返回值为zend_long
#define zval_get_long(op) _zval_get_long((op))
//获取格式化为double的值，返回值double
#define zval_get_double(op) _zval_get_double((op))
//获取格式化为string的值，返回值zend_string *
#define zval_get_string(op) _zval_get_string((op))
//字符串转整形
ZEND_API int ZEND_FASTCALL zend_atoi(const char *str, int str_len);
ZEND_API zend_long ZEND_FASTCALL zend_atol(const char *str, int str_len);
//判断是否为true
#define zval_is_true(op) \
zend_is_true(op)
```
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