Questions tagged [php-internals]
How the PHP programming language works underneath, and questions about the underlying C code.
php-internals
268
questions
0
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Tag a data to curl HTTP request in PHP C++ extension
I have a PHP C++ extension that monitors the web requests and captures the required request details with Call stacks.
Here from my PHP C++ extension whenever curl_exec(..) happens and a HTTP ...
- 608
2
votes
1
answer
265
views
Getting function argument value from PHP extension in c++
I have created php extension in c++.In version php 5.6 can able to get currently executed function details. I was getting the arguments value as follows,
if (real_execute_data->function_state....
- 87
1
vote
0
answers
43
views
What is the role of uninitialized_zval in the PHP kernel?
uninitialized_zval appears in multiple places in the PHP kernel, but I don't know what it does. For example, in the ZEND_ASSIGN_DIM_SPEC_CV_UNUSED_OP_DATA_CONST_HANDLER handler:
...
- 15
5
votes
2
answers
1k
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Which PHP functions are affected by allow_url_fopen?
In PHP, the allow_url_fopen flag controls whether or not remote URLs can be used by various file system functions, in order to access remote files.
It is recommended security best practice nowadays ...
- 1,283
1
vote
1
answer
410
views
What goes in the PHP root buffer and what happens if it gets bigger than 10K
I have a long-running PHP script that seems to have a memory leak and that got me diving into how PHP garbage collection works. I had some questions about it and maybe there are some people on here ...
- 93
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votes
1
answer
88
views
Object Iteration [closed]
I know that iteration over an object is equal to iterating over the visible properties of the class.
class MyClass
{
public $var1 = 'value 1';
public $var2 = 'value 2';
public $var3 = '...
- 638
0
votes
1
answer
202
views
How to read this function in C?
While reading about PHP Zend Engine internals, I came across function
zend_parse_parameters() which is used as the following
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &number) ...
- 13
2
votes
0
answers
2k
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The Zend Engine API version 320170718 which is installed, is newer
I am currently experiencing a problem with xdebug. I wanted to do a
php bin/console cache:clear
for my Symfony application but it got me this error:
Warning: Xdebug MUST be loaded as a Zend ...
- 107
3
votes
2
answers
343
views
Which is faster between (string)$value and "$value" when casting to a string
In PHP, assuming $value = 12345;(an integer), which is faster when casting $value from an integer to a string;
$value = (string)$value;
or
$value = "$value";
This is a kind of performance measure ...
- 1,100
2
votes
2
answers
293
views
PHP7 hashtable internal structure
There is very efficient assoc. array C language implementation used in php source code.
/*
* HashTable Data Layout
* =====================
*
* +=============================+
* ...
- 682
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45
views
what is the functionality of `/* $Id$ */` in php-src files
It's included in many files.
For example:
/* $Id: php_cli.c 306938 2011-01-01 02:17:06Z felipe $ */
Is this helping debug process or something else? Any tool related?
- 108
1
vote
2
answers
248
views
Fetch the function return value in PHP extension C++
I have created an php extension in c++ which tracks the call graph of each request(centos7-64 bit,PHP5.6).And now,I want to get the function return value of each function.
It can be done by using ...
- 87
2
votes
0
answers
207
views
What is the proper way to add elements to an empty array passed to an extension function in PHP 7.3?
I'm trying to port an old PHP extension of mine working for PHP 5.4 to PHP 7.3 (7.3.0 RC3 more precisely).
I'm building the extension using Visual Studio 2017 on Windows 10 Pro x64, building both for ...
2
votes
0
answers
166
views
Apache, mod_php, and MINIT
When running PHP programs using mod_php, when does PHP call its extension's MINIT functions? Does this happen
When the apache web server restarts?
Whenever apache spins up a new thread pool to ...
- 165k
0
votes
1
answer
722
views
var_dump(object) results "*RECURSION*"
I'm write simple extension with class definition
extension.h
zend_class_entry * ExampleClass_class;
zend_class_entry * get_ExampleClass_class();
extension.c
#include "php.h"
#include "extension.h"
...
- 1,341