A compilation of array operations in zend-PHP Tutorial-php.cn

A compilation of array operations in zend

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Release： 2016-07-29 08:58:11

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The value of the array is stored in the zvalue_value.ht field, ht is the data of a HashTable
In the Zend/zend_vm_execute.h file
static int ZEND_FASTCALL ZEND_INIT_ARRAY_SPEC_CV_CONST_HANDLER(ZEND_OPCODE_HANDLER_ARGS)
{
zend_op * opline = EX(opline);
array_init( &EX_T(opline->result.u.var).tmp_var); //Allocate array memory space, initialize
if (IS_CV == IS_UNUSED) {
ZEND_VM_NEXT_OPCODE();
#if 0 || IS_CV != IS_UNUSED
} else {
,,,,,,,,,,,,,,,,,,,,,,, zval *arg, uint size ZEND_FILE_LINE_DC) /* {{{ */
{
ALLOC_HASHTABLE_REL(Z_ARRVAL_P(arg );
}
Did you see it, Hash Table initialization function_zend_hash_init
In PHP expansion, we can write this way:
Php_function (test) {
zval *value;
make_std_zval (value);
Array_init (Value);

T_SYMBOL (EG (Active_symbol_table), "STAR" , value);
Add the key code of an element
add_assoc_long(zval *array, char *key, long n); Add a long integer element.
add_assoc_unset(zval *array, char *key); Add an unset element.
add_assoc_bool(zval *array, char *key, int b); Add a Boolean value.
add_assoc_resource(zval *array, char *key, int r); Add a resource.
add_assoc_double(zval *array, char *key, double d); Add a floating point value.
add_assoc_string(zval *array, char *key, char *str, int duplicate); Add a string. duplicate is used to indicate whether this string should be copied to Zend's internal memory.
add_assoc_stringl(zval *array, char *key, char *str, uint length, int duplicate); Add a string of specified length.
add_assoc_zval(zval *array, char *key, zval *value); Add a zval structure.
add_index_long(zval *array, uint idx, long n); Add a long integer element.
add_index_unset(zval *array, uint idx); Add an unset element.
add_index_bool(zval *array, uint idx, int b); Add a Boolean value.
add_index_resource(zval *array, uint idx, int r); Add a resource.
add_index_double(zval *array, uint idx, double d); Add a floating point value.
add_index_string(zval *array, uint idx, char *str, int duplicate);
Add a string. duplicate is used to indicate whether this string should be copied to Zend's internal memory.
add_index_stringl(zval *array, uint idx, char *str, uint length, int duplicate); Add a string of specified length.
add_index_zval(zval *array, uint idx, zval *value); Add a zval structure.
add_next_index_long(zval *array, long n); Add a long integer element.
add_next_index_unset(zval *array); Add an unset element.
add_next_index_bool(zval *array, int b); Add a Boolean value.
add_next_index_resource(zval *array, int r); Add a resource.
add_next_index_double(zval *array, double d); Add a floating point value.
add_next_index_string(zval *array, char *str, int duplicate); Add a string. duplicate is used to indicate whether this string should be copied to Zend's internal memory.
add_next_index_stringl(zval *array, char *str, uint length, int duplicate); Add a string of specified length.
add_next_index_zval(zval *array, zval *value); Add a zval structure. Add another array, object or stream of data.

The above is an introduction to the array operations in zend, including various aspects. I hope it will be helpful to friends who are interested in PHP tutorials.