PHP-extension

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PHP extension

Zend

Data structure

Array与HashTable

Hello World!

MM

引用计数

C: malloc、free、strdup、realloc、calloc

VAR

创建PHP变量

ZVAL_STRING(pzv, str, dup);

ZVAL_STRINGL(pzv,str,len,dup);

ZVAL_BOOL(pzv, b);

ZVAL_NULL(pvz);

值

...

8种数据类型

#define Z_TYPE(zval) (zval).type #define Z_TYPE_P(zval_p) Z_TYPE(*zval_p) #define Z_TYPE_PP(zval_pp) Z_TYPE(**zval_pp)

IS_RESOURCE

IS_OBJECT

IS_ARRAY

HashTable

IS_STRING

IS_DOUBLE

signed double

IS_LONG

signed long

IS_BOOL

true; false

IS_NULL

null

zval

typedef union _zvalue_value { long lval; /* long value */ double dval; /* double value */ struct { char *val; int len; } str; HashTable *ht; /* hash table value */ zend_object_value obj; } zvalue_value;

struct _zval_struct { zvalue_value value; /* 变量的值 */ zend_uint refcount__gc; zend_uchar type; /* 变量当前的数据类型 */ zend_uchar is_ref__gc; }; typedef struct _zval_struct zval; typedef unsigned int zend_uint; typedef unsigned char zend_uchar;

Lifecycles

PHP的启动与终止

MSHUTDOWN

PHP_MSHUTDOWN_FUNCTION

Module Shutdown

RSHUTDOWN

PHP_RSHUTDOWN_FUNCTION

Request Shutdown

RINIT

PHP_RINIT_FUNCTION

Request Initialization

MINIT

PHP_MINIT_FUNCTION

MINIT全称Module Initialization，是由每个扩展自己实现的一个函数

PHP Architecture