mirror of
https://github.com/php/php-src.git
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536 lines
15 KiB
C
536 lines
15 KiB
C
/*
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$Id$
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "php.h"
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#include "php_ini.h"
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#include "ext/standard/info.h"
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#include "ext/standard/php_string.h"
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#include "php_variables.h"
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#include "filter.h"
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ZEND_DECLARE_MODULE_GLOBALS(filter)
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#ifndef PARSE_ENV
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#define PARSE_ENV 4
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#endif
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#ifndef PARSE_SERVER
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#define PARSE_SERVER 5
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#endif
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/* {{{ filter_functions[]
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*/
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function_entry filter_functions[] = {
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PHP_FE(filter, NULL)
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{NULL, NULL, NULL}
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};
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/* }}} */
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/* {{{ filter_module_entry
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*/
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zend_module_entry filter_module_entry = {
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#if ZEND_MODULE_API_NO >= 20010901
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STANDARD_MODULE_HEADER,
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#endif
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"filter",
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filter_functions,
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PHP_MINIT(filter),
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PHP_MSHUTDOWN(filter),
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NULL,
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PHP_RSHUTDOWN(filter),
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PHP_MINFO(filter),
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"0.1",
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STANDARD_MODULE_PROPERTIES
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};
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/* }}} */
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#ifdef COMPILE_DL_FILTER
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ZEND_GET_MODULE(filter)
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#endif
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/* {{{ UpdateDefaultFilter
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*/
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static PHP_INI_MH(UpdateDefaultFilter) {
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if(!strcasecmp(new_value, "notags")) {
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IF_G(default_filter) = NOTAGS;
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}
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else
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if(!strcasecmp(new_value, "raw")) {
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IF_G(default_filter) = F_UNSAFE_RAW;
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}
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return SUCCESS;
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}
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/* }}} */
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/* {{{ PHP_INI
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*/
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PHP_INI_BEGIN()
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STD_PHP_INI_ENTRY("filter.default", "notags", PHP_INI_ALL, UpdateDefaultFilter, default_filter, zend_filter_globals, filter_globals)
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PHP_INI_END()
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/* }}} */
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/* {{{ php_filter_init_globals
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*/
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static void php_filter_init_globals(zend_filter_globals *filter_globals)
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{
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filter_globals->post_array = NULL;
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filter_globals->get_array = NULL;
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filter_globals->cookie_array = NULL;
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filter_globals->env_array = NULL;
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filter_globals->server_array = NULL;
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filter_globals->default_filter = NOTAGS;
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}
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/* }}} */
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#define PARSE_REQUEST 99
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/* {{{ PHP_MINIT_FUNCTION
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*/
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PHP_MINIT_FUNCTION(filter)
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{
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ZEND_INIT_MODULE_GLOBALS(filter, php_filter_init_globals, NULL);
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REGISTER_INI_ENTRIES();
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REGISTER_LONG_CONSTANT("FILTER_POST", PARSE_POST, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_GET", PARSE_GET, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_COOKIE", PARSE_COOKIE, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_REQUEST", PARSE_REQUEST, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_ENV", PARSE_ENV, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_SERVER", PARSE_SERVER, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_NONE", FILTER_FLAG_NONE, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_STRIP_LOW", FILTER_FLAG_STRIP_LOW, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_STRIP_HIGH", FILTER_FLAG_STRIP_HIGH, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_COOK_LOW", FILTER_FLAG_COOK_LOW, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_COOK_HIGH", FILTER_FLAG_COOK_HIGH, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_SIGN", FILTER_FLAG_ALLOW_SIGN, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_FRACTION", FILTER_FLAG_ALLOW_FRACTION, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_THOUSAND", FILTER_FLAG_ALLOW_THOUSAND, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_ENCODE_AMP", FILTER_FLAG_ENCODE_AMP, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_HTML_NO_TAGS", FILTER_HTML_NO_TAGS, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_UNSAFE_RAW", F_UNSAFE_RAW, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_STRIPPED", F_STRIPPED, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_COOKED", F_COOKED, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_HTML", F_HTML, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_EMAIL", F_EMAIL, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_URL", F_URL, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_NUMBER", F_NUMBER, CONST_CS | CONST_PERSISTENT);
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sapi_register_input_filter(php_sapi_filter);
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return SUCCESS;
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}
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/* }}} */
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/* {{{ PHP_MSHUTDOWN_FUNCTION
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*/
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PHP_MSHUTDOWN_FUNCTION(filter)
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{
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UNREGISTER_INI_ENTRIES();
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return SUCCESS;
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}
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/* }}} */
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/* {{{ PHP_RSHUTDOWN_FUNCTION
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*/
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PHP_RSHUTDOWN_FUNCTION(filter)
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{
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if(IF_G(get_array)) {
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zval_ptr_dtor(&IF_G(get_array));
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IF_G(get_array) = NULL;
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}
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if(IF_G(post_array)) {
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zval_ptr_dtor(&IF_G(post_array));
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IF_G(post_array) = NULL;
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}
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if(IF_G(cookie_array)) {
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zval_ptr_dtor(&IF_G(cookie_array));
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IF_G(cookie_array) = NULL;
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}
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if(IF_G(env_array)) {
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zval_ptr_dtor(&IF_G(env_array));
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IF_G(env_array) = NULL;
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}
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if(IF_G(server_array)) {
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zval_ptr_dtor(&IF_G(server_array));
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IF_G(server_array) = NULL;
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}
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return SUCCESS;
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}
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/* }}} */
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/* {{{ PHP_MINFO_FUNCTION
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*/
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PHP_MINFO_FUNCTION(filter)
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{
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char tmp[256];
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php_info_print_table_start();
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php_info_print_table_row( 2, "PHP extension for Input Validation and Filtering", "enabled" );
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php_info_print_table_row( 2, "Revision", "$Revision$");
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sprintf(tmp, "%d",IF_G(default_filter));
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php_info_print_table_row( 2, "default_filter", tmp);
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php_info_print_table_end();
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DISPLAY_INI_ENTRIES();
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}
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/* }}} */
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/* {{{ php_sapi_filter(int arg, char *var, char **val, unsigned int val_len, unsigned *new_val_len)
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*/
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unsigned int php_sapi_filter(int arg, char *var, char **val, unsigned int val_len, unsigned int *new_val_len TSRMLS_DC)
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{
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zval new_var;
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zval *array_ptr = NULL;
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char *raw_var, *out;
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int var_len, res, ol, out_len;
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assert(*val != NULL);
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if(IF_G(default_filter)==F_UNSAFE_RAW) return(val_len);
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switch(arg) {
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case PARSE_GET:
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if(!IF_G(get_array)) {
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ALLOC_ZVAL(array_ptr);
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array_init(array_ptr);
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INIT_PZVAL(array_ptr);
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IF_G(get_array) = array_ptr;
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}
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else {
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array_ptr = IF_G(get_array);
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}
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break;
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case PARSE_POST:
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if(!IF_G(post_array)) {
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ALLOC_ZVAL(array_ptr);
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array_init(array_ptr);
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INIT_PZVAL(array_ptr);
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IF_G(post_array) = array_ptr;
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}
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else {
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array_ptr = IF_G(post_array);
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}
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break;
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case PARSE_COOKIE:
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if(!IF_G(cookie_array)) {
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ALLOC_ZVAL(array_ptr);
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array_init(array_ptr);
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INIT_PZVAL(array_ptr);
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IF_G(cookie_array) = array_ptr;
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}
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else {
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array_ptr = IF_G(cookie_array);
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}
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break;
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case PARSE_ENV:
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if(!IF_G(env_array)) {
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ALLOC_ZVAL(array_ptr);
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array_init(array_ptr);
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INIT_PZVAL(array_ptr);
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IF_G(env_array) = array_ptr;
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}
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else {
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array_ptr = IF_G(env_array);
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}
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break;
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case PARSE_SERVER:
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if(!IF_G(server_array)) {
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ALLOC_ZVAL(array_ptr);
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array_init(array_ptr);
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INIT_PZVAL(array_ptr);
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IF_G(server_array) = array_ptr;
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}
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else {
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array_ptr = IF_G(server_array);
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}
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break;
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}
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Z_STRLEN(new_var) = val_len;
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Z_STRVAL(new_var) = estrndup(*val, val_len);
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Z_TYPE(new_var) = IS_STRING;
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var_len = strlen(var);
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raw_var = emalloc(var_len+5); /* RAW_ and a \0 */
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strcpy(raw_var, "RAW_");
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strlcat(raw_var,var,var_len+5);
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php_register_variable_ex(raw_var, &new_var, array_ptr TSRMLS_DC);
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ol = 0;
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out_len = val_len * 2;
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if(!out_len) out = estrdup("");
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else out = emalloc(out_len);
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while((res = php_filter_get_html(*val, val_len, out, &out_len, FILTER_HTML_NO_TAGS, FILTER_FLAG_ENCODE_AMP, NULL)) == FILTER_RESULT_OUTLEN_SMALL) {
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efree(out);
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ol++;
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out_len *= ol; /* Just in case we don't actually get the right out_len for some reason */
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out = emalloc(out_len);
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}
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*val = out;
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#if PHP_API_VERSION > 20041224
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if(new_val_len) *new_val_len = out_len?out_len-1:0;
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#endif
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return(out_len?out_len-1:0);
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}
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/* }}} */
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/* {{{ static void filter_recursive(zval *array, long filter, long flags, char *charset TSRMLS_DC)
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*/
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static void filter_recursive(zval *array, long filter, long flags, char *charset TSRMLS_DC)
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{
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zval **element;
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HashPosition pos;
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int out_len, res, ol=0; /* Yes, ol should start at 0 here because the filter returns the right length */
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char *out;
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if (Z_TYPE_P(array) == IS_ARRAY) {
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for (zend_hash_internal_pointer_reset_ex(Z_ARRVAL_P(array), &pos);
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zend_hash_get_current_data_ex(Z_ARRVAL_P(array), (void **) &element, &pos) == SUCCESS;
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zend_hash_move_forward_ex(Z_ARRVAL_P(array), &pos)) {
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filter_recursive(*element, filter, flags, charset TSRMLS_CC);
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}
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} else if(Z_STRLEN_P(array)) {
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switch(filter) {
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case F_STRIPPED:
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out_len = Z_STRLEN_P(array) + 1;
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out = emalloc(out_len);
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while((res = php_filter_get_stripped(Z_STRVAL_P(array), Z_STRLEN_P(array), out, &out_len, flags, charset)) == FILTER_RESULT_OUTLEN_SMALL) {
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efree(out);
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ol++;
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out_len *= ol;
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out = emalloc(out_len);
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}
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efree(Z_STRVAL_P(array));
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Z_STRVAL_P(array) = out;
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Z_STRLEN_P(array) = out_len - 1;
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break;
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case F_COOKED:
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out_len = Z_STRLEN_P(array) * 2;
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out = emalloc(out_len);
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while((res = php_filter_get_cooked(Z_STRVAL_P(array), Z_STRLEN_P(array), out, &out_len, flags, charset)) == FILTER_RESULT_OUTLEN_SMALL) {
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efree(out);
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ol++;
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out_len *= ol;
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out = emalloc(out_len);
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}
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efree(Z_STRVAL_P(array));
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Z_STRVAL_P(array) = out;
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Z_STRLEN_P(array) = out_len - 1;
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break;
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case F_EMAIL:
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out_len = Z_STRLEN_P(array) + 1;
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out = emalloc(out_len);
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while((res = php_filter_get_email(Z_STRVAL_P(array), Z_STRLEN_P(array), out, &out_len, flags, charset)) == FILTER_RESULT_OUTLEN_SMALL) {
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efree(out);
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ol++;
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out_len *= ol;
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out = emalloc(out_len);
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}
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if(res==FILTER_RESULT_BAD_IN) { Z_TYPE_P(array) = IS_BOOL; Z_LVAL_P(array) = 0; }
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else {
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efree(Z_STRVAL_P(array));
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Z_STRVAL_P(array) = out;
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Z_STRLEN_P(array) = out_len - 1;
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}
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break;
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case F_URL:
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out_len = Z_STRLEN_P(array) + 1;
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out = emalloc(out_len);
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while((res = php_filter_get_url(Z_STRVAL_P(array), Z_STRLEN_P(array), out, &out_len, flags, charset)) == FILTER_RESULT_OUTLEN_SMALL) {
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efree(out);
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ol++;
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out_len *= ol;
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out = emalloc(out_len);
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}
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if(res==FILTER_RESULT_BAD_IN) { Z_TYPE_P(array) = IS_BOOL; Z_LVAL_P(array) = 0; }
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else {
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efree(Z_STRVAL_P(array));
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Z_STRVAL_P(array) = out;
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Z_STRLEN_P(array) = out_len - 1;
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}
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break;
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case F_NUMBER:
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out_len = Z_STRLEN_P(array) + 1;
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out = emalloc(out_len);
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while((res = php_filter_get_number(Z_STRVAL_P(array), Z_STRLEN_P(array), out, &out_len, flags, charset)) == FILTER_RESULT_OUTLEN_SMALL) {
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efree(out);
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ol++;
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out_len *= ol;
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out = emalloc(out_len);
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}
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if(res==FILTER_RESULT_BAD_IN) { Z_TYPE_P(array) = IS_BOOL; Z_LVAL_P(array) = 0; }
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else {
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efree(Z_STRVAL_P(array));
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Z_STRVAL_P(array) = out;
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Z_STRLEN_P(array) = out_len - 1;
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}
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break;
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case F_NOTAGS:
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default:
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out_len = Z_STRLEN_P(array) + 1;
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out = emalloc(out_len);
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while((res = php_filter_get_html(Z_STRVAL_P(array), Z_STRLEN_P(array), out, &out_len, FILTER_HTML_NO_TAGS, flags, charset)) == FILTER_RESULT_OUTLEN_SMALL) {
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efree(out);
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ol++;
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out_len *= ol;
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out = emalloc(out_len);
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}
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efree(Z_STRVAL_P(array));
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Z_STRVAL_P(array) = out;
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Z_STRLEN_P(array) = out_len - 1;
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}
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}
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}
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/* }}} */
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/* {{{ filter(constant type, string variable_name [, int filter [, int flags [, string charset]]])
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*/
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PHP_FUNCTION(filter)
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{
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long arg, filter = F_NOTAGS, flags = 0;
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char *var;
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int var_len, charset_len, found = 0;
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int argc = ZEND_NUM_ARGS();
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zval **tmp;
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zval *array_ptr = NULL, *array_ptr2 = NULL, *array_ptr3 = NULL;
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HashTable *hash_ptr;
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char *raw_var, *charset = NULL;
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if(zend_parse_parameters(argc TSRMLS_CC, "ls|lls", &arg, &var, &var_len, &filter, &flags, &charset, &charset_len) == FAILURE) {
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return;
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}
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switch(arg) {
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case PARSE_GET:
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if(IF_G(default_filter)!=F_UNSAFE_RAW) array_ptr = IF_G(get_array);
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else array_ptr = PG(http_globals)[TRACK_VARS_GET];
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break;
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case PARSE_POST:
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if(IF_G(default_filter)!=F_UNSAFE_RAW) array_ptr = IF_G(post_array);
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else array_ptr = PG(http_globals)[TRACK_VARS_POST];
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break;
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case PARSE_COOKIE:
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if(IF_G(default_filter)!=F_UNSAFE_RAW) array_ptr = IF_G(cookie_array);
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else array_ptr = PG(http_globals)[TRACK_VARS_COOKIE];
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break;
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case PARSE_ENV:
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if(IF_G(default_filter)!=F_UNSAFE_RAW) array_ptr = IF_G(env_array);
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else array_ptr = PG(http_globals)[TRACK_VARS_ENV];
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break;
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case PARSE_SERVER:
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if(IF_G(default_filter)!=F_UNSAFE_RAW) array_ptr = IF_G(server_array);
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else array_ptr = PG(http_globals)[TRACK_VARS_SERVER];
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break;
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case PARSE_REQUEST:
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if (PG(variables_order)) {
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zval **a_ptr = &array_ptr;
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char *p, *variables_order = PG(variables_order);
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for (p=variables_order; p && *p; p++) {
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switch(*p) {
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case 'p':
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case 'P':
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if(IF_G(default_filter)!=F_UNSAFE_RAW) *a_ptr = IF_G(post_array);
|
|
else *a_ptr = PG(http_globals)[TRACK_VARS_POST];
|
|
break;
|
|
case 'g':
|
|
case 'G':
|
|
if(IF_G(default_filter)!=F_UNSAFE_RAW) *a_ptr = IF_G(get_array);
|
|
else *a_ptr = PG(http_globals)[TRACK_VARS_GET];
|
|
break;
|
|
case 'c':
|
|
case 'C':
|
|
if(IF_G(default_filter)!=F_UNSAFE_RAW) *a_ptr = IF_G(cookie_array);
|
|
else *a_ptr = PG(http_globals)[TRACK_VARS_COOKIE];
|
|
break;
|
|
}
|
|
if(array_ptr && !array_ptr2) { a_ptr = &array_ptr2; continue; }
|
|
if(array_ptr2 && !array_ptr3) { a_ptr = &array_ptr3; }
|
|
}
|
|
} else {
|
|
if(IF_G(default_filter)!=F_UNSAFE_RAW) array_ptr = IF_G(get_array);
|
|
else array_ptr = PG(http_globals)[TRACK_VARS_GET];
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
if(!array_ptr) RETURN_FALSE;
|
|
|
|
if(IF_G(default_filter)!=F_UNSAFE_RAW) {
|
|
/*
|
|
* I'm changing the variable name here because when running with register_globals on,
|
|
* the variable will end up in the global symbol table and I am using that var name
|
|
* in the internal raw storage arrays as well.
|
|
*/
|
|
var_len += 5;
|
|
raw_var = emalloc(var_len); /* RAW_ and a \0 */
|
|
strcpy(raw_var, "RAW_");
|
|
strlcat(raw_var,var,var_len);
|
|
} else {
|
|
raw_var = var;
|
|
var_len++;
|
|
}
|
|
|
|
if(array_ptr3) {
|
|
hash_ptr = HASH_OF(array_ptr3);
|
|
if(hash_ptr && zend_hash_find(hash_ptr, raw_var, var_len, (void **)&tmp) == SUCCESS) {
|
|
*return_value = **tmp;
|
|
found = 1;
|
|
}
|
|
}
|
|
|
|
if(array_ptr2 && !found) {
|
|
hash_ptr = HASH_OF(array_ptr2);
|
|
if(hash_ptr && zend_hash_find(hash_ptr, raw_var, var_len, (void **)&tmp) == SUCCESS) {
|
|
*return_value = **tmp;
|
|
found = 1;
|
|
}
|
|
}
|
|
|
|
if(!found) {
|
|
hash_ptr = HASH_OF(array_ptr);
|
|
|
|
if(hash_ptr && zend_hash_find(hash_ptr, raw_var, var_len, (void **)&tmp) == SUCCESS) {
|
|
*return_value = **tmp;
|
|
found = 1;
|
|
}
|
|
}
|
|
|
|
if(found) {
|
|
zval_copy_ctor(return_value); /* Watch out for empty strings */
|
|
if(filter != F_UNSAFE_RAW) {
|
|
filter_recursive(return_value, filter, flags, charset);
|
|
}
|
|
} else {
|
|
RETVAL_FALSE;
|
|
}
|
|
|
|
if(IF_G(default_filter)!=F_UNSAFE_RAW) {
|
|
efree(raw_var);
|
|
}
|
|
}
|
|
/* }}} */
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* End:
|
|
vim600: noet sw=4 ts=4 fdm=marker
|
|
* vim<600: noet sw=4 ts=4
|
|
*/
|