How to solve the problem of data loss discovered when php post contains a large amount of data

How to solve the problem of data loss discovered when php post contains a large amount of data

This article mainly introduces how to solve the problem of data loss discovered when php post contains a large amount of data, because the data size configuration in the default configuration is too small. Just modify the configuration, for more information, see

Solution:

Set max_input_vars to 5000 in php. ini.

Cause tracing:

From enctype = "multipart/form-data"

Php version 5.6.6

Problem: Some POST data cannot be received

Source code tracing is found to be caused by the max_input_vars configuration in php;

The related function is rfc1867_post_handler. If the length is exceeded, safe_php_register_variable is not called for variable registration.

The related stack is as follows:

The Code is as follows:

#0 rfc1867_post_handler (

Content_type_dup = 0x7ff85307a5f8 "multipart/form-data; boundary = ",'-' "306141311912057 ",

Arg = 0x7ff85307ccc0) at/tmp/php-5.6.2/main/rfc1867.c: 681

#1 0x00000000007a4bb0 in sapi_handle_post (arg = ) At/tmp/php-5.6.2/main/SAPI. c: 185

#2 0x00000000007ab72f in php_default_treat_data (arg = 0, str = 0x0, destArray = 0x7ff85307ccc0)

At/tmp/php-5.6.2/main/php_variables.c: 399

#3 0x0000000000615c91 in mbstr_treat_data (arg = 0, str = 0x0, destArray = 0x0) at/tmp/php-5.6.2/ext/mbstring/mb_gpc.c: 69

#4 0x00000000007aa9fb in php_auto_globals_create_post (name = 0x7ff852f474f0 "_ POST", name_len = 5)

At/tmp/php-5.6.2/main/php_variables.c: 741

#5 0x00000000007d63bb in zend_auto_global_init (auto_global = 0x196c950) at/tmp/php-5.6.2/Zend/zend_compile.c: 6832

#6 0x00000000000000808a43 in zend_hash_apply (ht = 0x1955cb0, apply_func = 0x7d63a0 )

At/tmp/php-5.6.2/Zend/zend_hash.c: 641

#7 0x00000000007aaa4e in php_hash_environment () at/tmp/php-5.6.2/main/php_variables.c: 702

#8 0x000000000079bb25 in php_request_startup () at/tmp/php-5.6.2/main. c: 1671

#9 0x000000000000008a756d in main (argc = , Argv = )

At/tmp/php-5.6.2/sapi/fpm/fpm_main.c: 1887

Rfc1867_post_handler is php_session_rfc1867_callback.

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