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539 lines
17 KiB
C
539 lines
17 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP Version 5 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2005 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.0 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_0.txt. |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Rasmus Lerdorf <rasmus@php.net> |
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| Derick Rethans <derick@php.net> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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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_filter.h"
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ZEND_DECLARE_MODULE_GLOBALS(filter)
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#include "filter_private.h"
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typedef struct filter_list_entry {
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char *name;
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int id;
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void (*function)(PHP_INPUT_FILTER_PARAM_DECL);
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} filter_list_entry;
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filter_list_entry filter_list[] = {
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{ "int", FL_INT, php_filter_int },
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{ "boolean", FL_BOOLEAN, php_filter_boolean },
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{ "float", FL_FLOAT, php_filter_float },
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{ "validate_regexp", FL_REGEXP, php_filter_validate_regexp },
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{ "validate_url", FL_URL, php_filter_validate_url },
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{ "validate_email", FL_EMAIL, php_filter_validate_email },
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{ "validate_ip", FL_IP, php_filter_validate_ip },
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{ "string", FS_STRING, php_filter_string },
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{ "stripped", FS_STRING, php_filter_string },
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{ "encoded", FS_ENCODED, php_filter_encoded },
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{ "special_chars", FS_SPECIAL_CHARS, php_filter_special_chars },
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{ "unsafe_raw", FS_UNSAFE_RAW, php_filter_unsafe_raw },
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{ "email", FS_EMAIL, php_filter_email },
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{ "url", FS_URL, php_filter_url },
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{ "number_int", FS_NUMBER_INT, php_filter_number_int },
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{ "number_float", FS_NUMBER_FLOAT, php_filter_number_float },
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{ "magic_quotes", FS_MAGIC_QUOTES, php_filter_magic_quotes },
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{ "callback", FC_CALLBACK, php_filter_callback },
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};
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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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#ifndef PARSE_SESSION
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#define PARSE_SESSION 6
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#endif
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static 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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/* {{{ filter_functions[]
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*/
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function_entry filter_functions[] = {
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PHP_FE(input_get, NULL)
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PHP_FE(input_filters_list, NULL)
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PHP_FE(filter_data, 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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{
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int i, size = sizeof(filter_list) / sizeof(filter_list_entry);
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for (i = 0; i < size; ++i) {
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if ((strcasecmp(new_value, filter_list[i].name) == 0)) {
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IF_G(default_filter) = filter_list[i].id;
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return SUCCESS;
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}
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}
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/* Fallback to "string" filter */
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IF_G(default_filter) = FS_DEFAULT;
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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", "string", 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->session_array = NULL;
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filter_globals->default_filter = FS_DEFAULT;
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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("INPUT_POST", PARSE_POST, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("INPUT_GET", PARSE_GET, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("INPUT_COOKIE", PARSE_COOKIE, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("INPUT_ENV", PARSE_ENV, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("INPUT_SERVER", PARSE_SERVER, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("INPUT_SESSION", PARSE_SESSION, 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("FL_INT", FL_INT, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FL_BOOLEAN", FL_BOOLEAN, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FL_FLOAT", FL_FLOAT, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FL_REGEXP", FL_REGEXP, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FL_URL", FL_URL, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FL_EMAIL", FL_EMAIL, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FL_IP", FL_IP, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FS_DEFAULT", FS_DEFAULT, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FS_STRING", FS_STRING, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FS_STRIPPED", FS_STRING, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FS_ENCODED", FS_ENCODED, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FS_SPECIAL_CHARS", FS_SPECIAL_CHARS, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FS_UNSAFE_RAW", FS_UNSAFE_RAW, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FS_EMAIL", FS_EMAIL, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FS_URL", FS_URL, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FS_NUMBER_INT", FS_NUMBER_INT, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FS_NUMBER_FLOAT", FS_NUMBER_FLOAT, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FS_MAGIC_QUOTES", FS_MAGIC_QUOTES, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FC_CALLBACK", FC_CALLBACK, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_OCTAL", FILTER_FLAG_ALLOW_OCTAL, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_ALLOW_HEX", FILTER_FLAG_ALLOW_HEX, 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_ENCODE_LOW", FILTER_FLAG_ENCODE_LOW, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_ENCODE_HIGH", FILTER_FLAG_ENCODE_HIGH, 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_FLAG_NO_ENCODE_QUOTES", FILTER_FLAG_NO_ENCODE_QUOTES, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_EMPTY_STRING_NULL", FILTER_FLAG_EMPTY_STRING_NULL, 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_ALLOW_SCIENTIFIC", FILTER_FLAG_ALLOW_SCIENTIFIC, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_SCHEME_REQUIRED", FILTER_FLAG_SCHEME_REQUIRED, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_HOST_REQUIRED", FILTER_FLAG_HOST_REQUIRED, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_PATH_REQUIRED", FILTER_FLAG_PATH_REQUIRED, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_QUERY_REQUIRED", FILTER_FLAG_QUERY_REQUIRED, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_IPV4", FILTER_FLAG_IPV4, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_IPV6", FILTER_FLAG_IPV6, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_NO_RES_RANGE", FILTER_FLAG_NO_RES_RANGE, CONST_CS | CONST_PERSISTENT);
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REGISTER_LONG_CONSTANT("FILTER_FLAG_NO_PRIV_RANGE", FILTER_FLAG_NO_PRIV_RANGE, 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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#define VAR_ARRAY_COPY_DTOR(a) \
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if (IF_G(a)) { \
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zval_ptr_dtor(&IF_G(a)); \
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IF_G(a) = NULL; \
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}
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PHP_RSHUTDOWN_FUNCTION(filter)
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{
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VAR_ARRAY_COPY_DTOR(get_array)
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VAR_ARRAY_COPY_DTOR(post_array)
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VAR_ARRAY_COPY_DTOR(cookie_array)
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VAR_ARRAY_COPY_DTOR(server_array)
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VAR_ARRAY_COPY_DTOR(env_array)
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VAR_ARRAY_COPY_DTOR(session_array)
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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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php_info_print_table_start();
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php_info_print_table_row( 2, "Input Validation and Filtering", "enabled" );
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php_info_print_table_row( 2, "Revision", "$Revision$");
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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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static filter_list_entry php_find_filter(long id)
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{
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int i, size = sizeof(filter_list) / sizeof(filter_list_entry);
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for (i = 0; i < size; ++i) {
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if (filter_list[i].id == id) {
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return filter_list[i];
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}
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}
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/* Fallback to "string" filter */
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for (i = 0; i < size; ++i) {
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if (filter_list[i].id == FS_DEFAULT) {
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return filter_list[i];
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}
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}
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/* To shut up GCC */
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return filter_list[0];
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}
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static void php_zval_filter(zval *value, long filter, long flags, zval *options, char* charset TSRMLS_DC)
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{
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filter_list_entry filter_func;
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filter_func = php_find_filter(filter);
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if (!filter_func.id) {
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/* Find default filter */
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filter_func = php_find_filter(FS_DEFAULT);
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}
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filter_func.function(value, flags, options, charset TSRMLS_CC);
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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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static 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, raw_var;
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zval *array_ptr = NULL, *orig_array_ptr = NULL;
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int out_len;
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char *orig_var;
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assert(*val != NULL);
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#define PARSE_CASE(s,a,t) \
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case s: \
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if (!IF_G(a)) { \
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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(a) = array_ptr; \
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} else { \
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array_ptr = IF_G(a); \
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} \
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orig_array_ptr = PG(http_globals)[t]; \
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break;
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switch (arg) {
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PARSE_CASE(PARSE_POST, post_array, TRACK_VARS_POST)
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PARSE_CASE(PARSE_GET, get_array, TRACK_VARS_GET)
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PARSE_CASE(PARSE_COOKIE, cookie_array, TRACK_VARS_COOKIE)
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PARSE_CASE(PARSE_SERVER, server_array, TRACK_VARS_SERVER)
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PARSE_CASE(PARSE_ENV, env_array, TRACK_VARS_ENV)
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}
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/* Make a copy of the variable name, as php_register_variable_ex seems to
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* modify it */
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orig_var = estrdup(var);
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/* Store the RAW variable internally */
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/* FIXME: Should not use php_register_variable_ex as that also registers
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* globals when register_globals is turned on */
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Z_STRLEN(raw_var) = val_len;
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Z_STRVAL(raw_var) = estrndup(*val, val_len + 1);
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Z_TYPE(raw_var) = IS_STRING;
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php_register_variable_ex(var, &raw_var, array_ptr TSRMLS_DC);
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/* Register mangled variable */
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/* FIXME: Should not use php_register_variable_ex as that also registers
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* globals when register_globals is turned on */
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Z_STRLEN(new_var) = val_len;
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Z_STRVAL(new_var) = estrndup(*val, val_len + 1);
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Z_TYPE(new_var) = IS_STRING;
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if (! (IF_G(default_filter) == FS_UNSAFE_RAW)) {
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php_zval_filter(&new_var, IF_G(default_filter), 0, NULL, NULL/*charset*/ TSRMLS_DC);
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}
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php_register_variable_ex(orig_var, &new_var, orig_array_ptr TSRMLS_DC);
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if (new_val_len) {
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*new_val_len = out_len;
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}
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return 0;
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}
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/* }}} */
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/* {{{ static void php_zval_filter_recursive(zval *array, long filter, long flags, char *charset TSRMLS_DC)
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*/
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static void php_zval_filter_recursive(zval *value, long filter, long flags, zval *options, char *charset TSRMLS_DC)
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{
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zval **element;
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HashPosition pos;
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if (Z_TYPE_P(value) == IS_ARRAY) {
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for (zend_hash_internal_pointer_reset_ex(Z_ARRVAL_P(value), &pos);
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zend_hash_get_current_data_ex(Z_ARRVAL_P(value), (void **) &element, &pos) == SUCCESS;
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zend_hash_move_forward_ex(Z_ARRVAL_P(value), &pos)) {
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php_zval_filter_recursive(*element, filter, flags, options, charset TSRMLS_CC);
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}
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} else if (Z_STRLEN_P(value)) {
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php_zval_filter(value, filter, flags, options, charset TSRMLS_CC);
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}
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}
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/* }}} */
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/* {{{ proto mixed input_get(constant type, string variable_name [, int filter [, mixed flags [, string charset]]])
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*/
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PHP_FUNCTION(input_get)
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{
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long arg, filter = FS_DEFAULT;
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char *var, *charset = NULL;
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int var_len, charset_len;
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zval *flags = NULL;
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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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int found = 0;
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int filter_flags = 0;
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zval *options = NULL;
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if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ls|lzs", &arg, &var, &var_len, &filter, &flags, &charset, &charset_len) == FAILURE) {
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return;
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}
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if (flags) {
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switch (Z_TYPE_P(flags)) {
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case IS_ARRAY:
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options = flags;
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break;
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case IS_STRING:
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case IS_BOOL:
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case IS_LONG:
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convert_to_long(flags);
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filter_flags = Z_LVAL_P(flags);
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options = NULL;
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break;
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}
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}
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#define FIND_SOURCE(a,t) \
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array_ptr = IF_G(a); \
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break;
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switch(arg) {
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case PARSE_GET: FIND_SOURCE(get_array, TRACK_VARS_GET)
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case PARSE_POST: FIND_SOURCE(post_array, TRACK_VARS_POST)
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case PARSE_COOKIE: FIND_SOURCE(cookie_array, TRACK_VARS_COOKIE)
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case PARSE_SERVER: FIND_SOURCE(server_array, TRACK_VARS_SERVER)
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case PARSE_ENV: FIND_SOURCE(env_array, TRACK_VARS_ENV)
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case PARSE_SESSION:
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|
/* FIXME: Implement session source */
|
|
break;
|
|
|
|
case PARSE_REQUEST:
|
|
if (PG(variables_order)) {
|
|
zval **a_ptr = &array_ptr;
|
|
char *p, *variables_order = PG(variables_order);
|
|
|
|
for (p = variables_order; p && *p; p++) {
|
|
switch (*p) {
|
|
case 'p':
|
|
case 'P':
|
|
if (IF_G(default_filter) != FS_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) != FS_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) != FS_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 {
|
|
FIND_SOURCE(get_array, TRACK_VARS_GET)
|
|
}
|
|
|
|
}
|
|
|
|
if (!array_ptr) {
|
|
RETURN_FALSE;
|
|
}
|
|
|
|
if (array_ptr3) {
|
|
hash_ptr = HASH_OF(array_ptr3);
|
|
if (hash_ptr && zend_hash_find(hash_ptr, var, var_len + 1, (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, var, var_len + 1, (void **)&tmp) == SUCCESS) {
|
|
*return_value = **tmp;
|
|
found = 1;
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
hash_ptr = HASH_OF(array_ptr);
|
|
|
|
if (hash_ptr && zend_hash_find(hash_ptr, var, var_len + 1, (void **)&tmp) == SUCCESS) {
|
|
*return_value = **tmp;
|
|
found = 1;
|
|
}
|
|
}
|
|
|
|
if (found) {
|
|
zval_copy_ctor(return_value); /* Watch out for empty strings */
|
|
php_zval_filter_recursive(return_value, filter, filter_flags, options, charset);
|
|
} else {
|
|
RETVAL_FALSE;
|
|
}
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ proto input_filters_list()
|
|
* Returns a list of all supported filters */
|
|
PHP_FUNCTION(input_filters_list)
|
|
{
|
|
int i, size = sizeof(filter_list) / sizeof(filter_list_entry);
|
|
|
|
array_init(return_value);
|
|
for (i = 0; i < size; ++i) {
|
|
add_next_index_string(return_value, filter_list[i].name, 1);
|
|
}
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ proto filter_data(mixed variable, int filter [, mixed filter_options [, string charset ]])
|
|
*/
|
|
PHP_FUNCTION(filter_data)
|
|
{
|
|
}
|
|
/* }}} */
|
|
|
|
/*
|
|
* 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
|
|
*/
|