Questions tagged [php-internals]
How the PHP programming language works underneath, and questions about the underlying C code.
php-internals
58
questions with no upvoted or accepted answers
5
votes
0
answers
288
views
PHP, Compile foreach and opline
I'm trying to figure out how a foreach statement is interpreted by PHP. That led me to use gdb while executing a dummy foreach script.
I end up in zend_compile.c, in the zend_compile_foreach() ...
- 1,217
4
votes
0
answers
268
views
PHP5 zval container vs PHP7 zval container. How references & variables are stored now?
I am following a tutorial & reading through some articles on how variables are stored in PHP using zval (zend value) container. Most of those articles seem to be following & getting ...
- 113
4
votes
0
answers
320
views
What userland strings get automatically interned by PHP?
I was trying to get a better understanding of PHP's internal mechanisms of string interning - more specifically:
What are the rules PHP uses to determine whether (or not) the string created in ...
- 6,475
4
votes
1
answer
638
views
How to overload functions from a PHP extension?
I've been going through some PHP extension tutorials, but I can't find any information about how to overload existing function.
For example, I want to change the fopen() to something like
...
- 750
3
votes
1
answer
1k
views
Why does set_exception_handler(func) not catch exceptions?
An exception is thrown in my shutdown function and not caught within a try/catch block, for example:
<?php
set_exception_handler(function($e){
echo "exception handled"; // not echoed
});
...
- 88.6k
2
votes
0
answers
174
views
How to call a PHP function from zend_compile.c?
I can't figure out how to call an existing PHP function, everytime I end up either with a segmentation fault or a Fatal error.
Disclaimer: I'm not experienced at all in low level programming, just ...
- 754
2
votes
0
answers
341
views
how to allocate & deallocate memory in php?
I'm trying to allocate memory dynamically in my code and release them ,I tried to use zend_mm but I couldn't add it to php 7,I'm using php 7.4 and xampp server , if it is impossible please tell my the ...
- 21
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
2
votes
0
answers
2k
views
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
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
2
votes
1
answer
190
views
Confusion using xdebug_debug_zval between refcount and is_ref
I'm using xdebug_debug_zval in order to understand how references changed between PHP 5 and PHP 7.
<?php
$array = array('k1', 'k2', 'k3');
echo PHP_VERSION. '<br/>';
foreach ($array as &$...
- 459
2
votes
0
answers
305
views
Linking Lame.h with PHP extension
I'm trying to develop my first php extension. It uses Lame , so I've installed liblame-dev
lame.h is located at /usr/include/lame/
In my config.m4
LIBNAME=lame
PHP_ADD_LIBRARY($LIBNAME)
It ...
- 371
1
vote
0
answers
35
views
Are PHP zvals mutable?
I've been reading about memory management in PHP and learned that variables in PHP copy the reference to zvals as long as you don't do a write operation (copy on write paradigm).
https://www....
- 338
1
vote
0
answers
267
views
How to create a php extension function with a return type-hint plus annotation
I'm trying to fix some php 8.1 deprecation notices in a PHP extension, which I believe involves either adding return type-hints (where possible, whilst maintaining some backwards-compatibility to php7....
- 612