(转)addslashes与mysql_real_escape_string的区别
我们为了更深层次的探究这两个函数的不同..还是去看一看PHP的源码吧..
这是PHP的addslashes函数..
PHP_FUNCTION(addslashes)
{
zval **str;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &str) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(str);
if (Z_STRLEN_PP(str) == 0) {
RETURN_EMPTY_STRING();
}
RETURN_STRING(php_addslashes(Z_STRVAL_PP(str),
Z_STRLEN_PP(str),
&Z_STRLEN_P(return_value), 0
TSRMLS_CC), 0);
}
很显然.它调用了php_addslashes.我们继续看这个函数
PHPAPI char *php_addslashes(char *str, int length, int *new_length, int should_free TSRMLS_DC)
{
return php_addslashes_ex(str, length, new_length, should_free, 0 TSRMLS_CC);
}
结果又是是在调用php_addslashes_ex 我们就像在剥洋葱一样..一步一步的接近真理..
PHPAPI char *php_addslashes_ex(char *str, int length, int *new_length, int should_free, int ignore_sybase TSRMLS_DC)
{
/* maximum string length, worst case situation */
char *new_str;
char *source, *target;
char *end;
int local_new_length;
if (!new_length) {
new_length = &local_new_length;
}
if (!str) {
*new_length = 0;
return str;
}
new_str = (char *) safe_emalloc(2, (length ? length : (length = strlen(str))), 1);
source = str;
end = source + length;
target = new_str;
if (!ignore_sybase && PG(magic_quotes_sybase)) {
while (source < end) {
switch (*source) {
case ‘\0’:
*target++ = ‘\\’;
*target++ = ‘0’;
break;
case ‘\”:
