Arrays Пред.
Глава 53. Creating Variables
- Arrays are stored using Zend's internal hash tables, which can be
accessed using the zend_hash_*() API. For every
array that you want to create, you need a new hash table handle,
which will be stored in the ht member of the
zval.value container.
- There's a whole API solely for the creation of arrays, which is extremely
handy. To start a new array, you call
array_init().
zval *new_array; |
array_init() always returns SUCCESS.
- To add new elements to the array, you can use numerous functions,
depending on what you want to do.
Табл. 53-2 and
describe these functions. All functions return
FAILURE on failure and
SUCCESS on success.
Таблица 53-1. Zend's API for Associative Arrays
Function | Description |
- add_assoc_long(zval *array, char *key, long n);() | Adds an element of type long. |
- add_assoc_unset(zval *array, char *key);() | Adds an unset element. |
- add_assoc_bool(zval *array, char *key, int b);() | Adds a Boolean element. |
- add_assoc_resource(zval *array, char *key, int r);() | Adds a resource to the array. |
- add_assoc_double(zval *array, char *key, double d);() | Adds a floating-point value. |
- add_assoc_string(zval *array, char *key, char *str, int duplicate);() | - Adds a string to the array. The
flag duplicate specifies whether the string contents have to be copied to Zend internal memory. |
- - add_assoc_stringl(zval *array, char *key, char *str, uint length, int duplicate);
() | - Adds a string with the desired length length
to the array. Otherwise, behaves like add_assoc_string(). |
add_assoc_zval(zval *array, char *key, zval *value);() | Adds a zval to the array. Useful for adding other arrays, objects, streams, etc... |
Таблица 53-2. Zend's API for Indexed Arrays, Part 1
Function | Description |
add_index_long(zval *array, uint idx, long
n);() | Adds an element of type long. |
add_index_unset(zval *array, uint
idx);() | Adds an unset element. |
add_index_bool(zval *array, uint idx, int
b);() | Adds a Boolean element. |
add_index_resource(zval *array, uint idx, int
r);() | Adds a resource to the array. |
add_index_double(zval *array, uint idx, double
d);() | Adds a floating-point value. |
add_index_string(zval *array, uint idx, char
*str, int duplicate);() | Adds a string to the array. The
flag duplicate specifies whether the string contents have to be copied to Zend internal memory. |
add_index_stringl(zval *array, uint idx, char
*str, uint length, int duplicate);() | Adds a string with the desired
length length to the array. This function is faster and binary-safe. Otherwise, behaves like add_index_string()(). |
add_index_zval(zval *array, uint idx, zval *value);() | Adds a zval to the array. Useful for adding other arrays, objects, streams, etc... |
Таблица 53-3. Zend's API for Indexed Arrays, Part 2
Function | Description |
add_next_index_long(zval *array, long
n);() | Adds an element of type long. |
add_next_index_unset(zval
*array);() | Adds an unset element. |
add_next_index_bool(zval *array, int
b);() | Adds a Boolean element. |
add_next_index_resource(zval *array, int
r);() | Adds a resource to the array. |
add_next_index_double(zval *array, double
d);() | Adds a floating-point value. |
add_next_index_string(zval *array, char *str,
int duplicate);() | Adds a string to the array. The
flag duplicate specifies whether the string contents have to be copied to Zend internal memory. |
add_next_index_stringl(zval *array, char *str,
uint length, int duplicate);() | Adds a string with the desired
length length to the array. This function is faster and binary-safe. Otherwise, behaves like add_index_string()(). |
add_next_index_zval(zval *array, zval *value);() | Adds a zval to the array. Useful for adding other arrays, objects, streams, etc... |
- All these functions provide a handy abstraction to Zend's internal hash
API. Of course, you can also use the hash functions directly - for example, if
you already have a zval container allocated that you want to
insert into an array. This is done using zend_hash_update()()
for associative arrays (see Прим. 53-3) and
zend_hash_index_update() for indexed arrays
(see Прим. 53-4):
Пример 53-4. Adding an element to an indexed array.
|
- To emulate the functionality of
add_next_index_*(), you can use this:
zend_hash_next_index_insert(ht, zval **new_element, sizeof(zval *), NULL) |
- Note: To return arrays from a function, use array_init() and
all following actions on the predefined variable return_value
(given as argument to your exported function; see the earlier discussion of the call interface). You do not have to use
MAKE_STD_ZVAL on this.
- Tip: To avoid having to
write new_array->value.ht every time, you can
use HASH_OF(new_array), which is also recommended for
compatibility and style reasons.
Booleans
Objects 22222