PHP solves the problem of loss when posting large amounts of data-PHP Tutorial-php.cn

PHP solves the problem of loss when posting large amounts of data

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Release： 2023-03-18 15:46:01

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How does php solve the problem of loss when posting large amounts of data? This article mainly introduces the solution to the problem of data loss when PHP posts a large amount of data. The reason is that the data volume configuration in the default configuration is too small. Just modify the configuration. I hope to be helpful.

Solution:

Just increase max_input_vars in php.ini and change it to 5000

Cause investigation:

enctype="multipart/form-data"

php version 5.6.6

Problem: Some POST data cannot be received

Follow up The source code was found to be caused by the max_input_vars configuration in php;

The relevant function is rfc1867_post_handler. If the length is exceeded, safe_php_register_variable will not be called to register the variable

The relevant stack is as follows

    rfc1867_post_handler (
    content_type_dup=0x7ff85307a5f8 "multipart/form-data; boundary=", &#39;-&#39; <repeats 27 times>, "306141311912057", 
    arg=0x7ff85307ccc0) at /tmp/php-5.6.2/main/rfc1867.c:681
    0x00000000007a4bb0 in sapi_handle_post (arg=<value optimized out>) at /tmp/php-5.6.2/main/SAPI.c:185
    0x00000000007ab72f in php_default_treat_data (arg=0, str=0x0, destArray=0x7ff85307ccc0)
    at /tmp/php-5.6.2/main/php_variables.c:399
    0x0000000000615c91 in mbstr_treat_data (arg=0, str=0x0, destArray=0x0) at /tmp/php-5.6.2/ext/mbstring/mb_gpc.c:69
    0x00000000007aa9fb in php_auto_globals_create_post (name=0x7ff852f474f0 "_POST", name_len=5)
    at /tmp/php-5.6.2/main/php_variables.c:741
    0x00000000007d63bb in zend_auto_global_init (auto_global=0x196c950) at /tmp/php-5.6.2/Zend/zend_compile.c:6832
    0x0000000000808a43 in zend_hash_apply (ht=0x1955cb0, apply_func=0x7d63a0 <zend_auto_global_init>)
    at /tmp/php-5.6.2/Zend/zend_hash.c:641
    0x00000000007aaa4e in php_hash_environment () at /tmp/php-5.6.2/main/php_variables.c:702
    0x000000000079bb25 in php_request_startup () at /tmp/php-5.6.2/main/main.c:1671
    0x00000000008a756d in main (argc=<value optimized out>, argv=<value optimized out>)
    at /tmp/php-5.6.2/sapi/fpm/fpm/fpm_main.c:1887

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where rfc1867_post_handler is php_session_rfc1867_callback

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