PHP扩展遍历数组
我开始编写一个PHP扩展,希望了解如何循环传递的数组(目的是逐值更改数据值)。首选的方法是for循环,这样我可以将array1与array2数据匹配,例如array1[0]链接到array2[0],[1]与[1]等 有人能帮忙吗 modarray.cPHP扩展遍历数组,php,c,php-extension,Php,C,Php Extension,我开始编写一个PHP扩展,希望了解如何循环传递的数组(目的是逐值更改数据值)。首选的方法是for循环,这样我可以将array1与array2数据匹配,例如array1[0]链接到array2[0],[1]与[1]等 有人能帮忙吗 modarray.c #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "php.h" extern zend_module_entry modarray_module_entry; #define ph
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
extern zend_module_entry modarray_module_entry;
#define phpext_modarray_ptr &modarray_module_entry
PHP_FUNCTION(modarray);
static function_entry modarray_functions[] = {
PHP_FE(modarray, NULL)
PHP_FE_END
};
zend_module_entry modarray_module_entry = {
STANDARD_MODULE_HEADER,
"modarray",
modarray_functions,
NULL,
NULL,
NULL,
NULL,
NULL,
"0.1",
STANDARD_MODULE_PROPERTIES
};
ZEND_GET_MODULE(modarray)
PHP_FUNCTION(modarray)
{
zval *val, *val2;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z|z", &val, &val2) == FAILURE){
return;
}
SEPARATE_ZVAL(&val);
SEPARATE_ZVAL(&val2);
array_init(return_value);
zval_add_ref(&val);
zval_add_ref(&val2);
add_next_index_zval(return_value, val);
add_next_index_zval(return_value, val2);
}
PHP代码
<?php
$array1 = array(1,2,3,4);
$array2 = array(5,6,7,8);
echo '<pre>';
print_r(modarray($array1,$array2));
echo '</pre>';
?>
有两种方法可以做到这一点,一种是通过使用迭代API完全“手动”:
static int replace_value(zval **arg, zval ****params TSRMLS_DC)
{
add_next_index_zval(params, val);
return ZEND_HASH_APPLY_REMOVE;
}
zval *in, ***out;
... fill in from somewhere from somewhere, e.g. argument parsing ...
array_init(**out);
zend_hash_apply_with_argument(Z_ARRVAL_P(collection, (apply_func_arg_t) replace_value, params TSRMLS_CC);
首选的替代方法是在三个zend\u hash\u apply*()
函数中的任意一个上使用回调函数,回调函数被认为更优雅:
function multi_diff($arr1,$arr2){
$result = array();
foreach ($arr1 as $k=>$v){
if(!isset($arr2[$k])){
$result[$k] = $v;
} else {
if(is_array($v) && is_array($arr2[$k])){
$diff = multi_diff($v, $arr2[$k]);
if(!empty($diff))
$result[$k] = $diff;
}
}
}
return $result;
}
//example:
var_dump(multi_diff(
array(
"A"=>array(
"A1"=>array('A1-0','A1-1','A1-2','A1-3'),
"A2"=>array('A2-0','A2-1','A2-2','A2-3'),
"A3"=>array('A3-0','A3-1','A3-2','A3-3')
),
"B"=>array(
"B1"=>array('B1-0','B1-1','B1-2','B1-3'),
"B2"=>array('B2-0','B2-1','B2-2','B2-3'),
"B3"=>array('B3-0','B3-1','B3-2','B3-3')
),
"C"=>array(
"C1"=>array('C1-0','C1-1','C1-2','C1-3'),
"C2"=>array('C2-0','C2-1','C2-2','C2-3'),
"C3"=>array('C3-0','C3-1','C3-2','C3-3')
),
"D"=>array(
"D1"=>array('D1-0','D1-1','D1-2','D1-3'),
"D2"=>array('D2-0','D2-1','D2-2','D2-3'),
"D3"=>array('D3-0','D3-1','D3-2','D3-3')
)
),
array(
"A"=>array(
"A1"=>array('A1-0','A1-1','A1-2','A1-3'),
"A2"=>array('A2-0','A2-1','A2-2','A2-3'),
"A3"=>array('A3-0','A3-1','A3-2')
),
"B"=>array(
"B1"=>array('B1-0','B1-2','B1-3'),
"B2"=>array('B2-0','B2-1','B2-2','B2-3'),
"B3"=>array('B3-0','B3-1','B3-3')
),
"C"=>array(
"C1"=>array('C1-0','C1-1','C1-2','C1-3'),
),
"D"=>array(
"D1"=>array('D1-0','D1-1','D1-2','D1-3'),
" "C3"=>array('C3-0','C3-1')
D2"=>array('D2-0','D2-1','D2-2','D2-3'),
"D3"=>array('D3-0','D3-1','D3-2','D3-3')
)
)
));
注意:我没有在本地测试这两个代码段,而是从不同的地方复制了它。您可以在xarray extension或php src中查看一些C代码段:
static int replace_value(zval **arg, zval ****params TSRMLS_DC)
{
add_next_index_zval(params, val);
return ZEND_HASH_APPLY_REMOVE;
}
zval *in, ***out;
... fill in from somewhere from somewhere, e.g. argument parsing ...
array_init(**out);
zend_hash_apply_with_argument(Z_ARRVAL_P(collection, (apply_func_arg_t) replace_value, params TSRMLS_CC);
function multi_diff($arr1,$arr2){
$result = array();
foreach ($arr1 as $k=>$v){
if(!isset($arr2[$k])){
$result[$k] = $v;
} else {
if(is_array($v) && is_array($arr2[$k])){
$diff = multi_diff($v, $arr2[$k]);
if(!empty($diff))
$result[$k] = $diff;
}
}
}
return $result;
}
//example:
var_dump(multi_diff(
array(
"A"=>array(
"A1"=>array('A1-0','A1-1','A1-2','A1-3'),
"A2"=>array('A2-0','A2-1','A2-2','A2-3'),
"A3"=>array('A3-0','A3-1','A3-2','A3-3')
),
"B"=>array(
"B1"=>array('B1-0','B1-1','B1-2','B1-3'),
"B2"=>array('B2-0','B2-1','B2-2','B2-3'),
"B3"=>array('B3-0','B3-1','B3-2','B3-3')
),
"C"=>array(
"C1"=>array('C1-0','C1-1','C1-2','C1-3'),
"C2"=>array('C2-0','C2-1','C2-2','C2-3'),
"C3"=>array('C3-0','C3-1','C3-2','C3-3')
),
"D"=>array(
"D1"=>array('D1-0','D1-1','D1-2','D1-3'),
"D2"=>array('D2-0','D2-1','D2-2','D2-3'),
"D3"=>array('D3-0','D3-1','D3-2','D3-3')
)
),
array(
"A"=>array(
"A1"=>array('A1-0','A1-1','A1-2','A1-3'),
"A2"=>array('A2-0','A2-1','A2-2','A2-3'),
"A3"=>array('A3-0','A3-1','A3-2')
),
"B"=>array(
"B1"=>array('B1-0','B1-2','B1-3'),
"B2"=>array('B2-0','B2-1','B2-2','B2-3'),
"B3"=>array('B3-0','B3-1','B3-3')
),
"C"=>array(
"C1"=>array('C1-0','C1-1','C1-2','C1-3'),
),
"D"=>array(
"D1"=>array('D1-0','D1-1','D1-2','D1-3'),
" "C3"=>array('C3-0','C3-1')
D2"=>array('D2-0','D2-1','D2-2','D2-3'),
"D3"=>array('D3-0','D3-1','D3-2','D3-3')
)
)
));