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1 vote
0 answers
86 views

I am attempting to hook into the functions within the PDO class. I declared the zend_execute_internal function and hooked it by setting the address of my custom function, but in the code of New Relic ...
0 votes
1 answer
75 views

I am making a big PHP array and then remove most of the beginning of it. As we know it won't free the memory only mark removed items as Undef, as explained by Nikita here. However when I put more ...
0 votes
0 answers
127 views

I've seen many questions about this (one of them here) $a = array('a', 'b', 'c', 'd'); foreach ($a as &$v) { } foreach ($a as $v) { } print_r($a); and I get the answers, you shouldn't be ...
0 votes
1 answer
77 views

i am new to php . i want to know the place where the array data and the address of array are being stored ? are they storing in heap and stack , respectivelylike C# ? I read many articles but I could ...
1 vote
0 answers
50 views

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....
0 votes
0 answers
30 views

Title. Since you can enable escape analysis, there should also be an opcode that uses stack allocation instead of heap, right? Or how would that work?
1 vote
0 answers
315 views

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....
1 vote
1 answer
306 views

Searching for it I found this blog post: https://www.npopov.com/2017/04/14/PHP-7-Virtual-machine.html Does it cover "everything" needed to add a new opcode, or all the places I'd need to ...
4 votes
0 answers
320 views

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 ...
Fuze's user avatar
  • 113
2 votes
0 answers
209 views

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 ...
Bloops's user avatar
  • 773
0 votes
1 answer
231 views

My question is about HashTable: The PHP VERSION debugged is PHP-7.0.12, I couldn't find out where the zval's str member is updated within the macro "ZVAL_COPY_VALUE(z, v)" when I add one new ...
4 votes
1 answer
294 views

You can lookup built-in functions by searching for e.g. PHPAPI(stream_copy_to_stream) and find the implementation in ext/standard/streamsfuncs.c. How to do that for a language construct like echo? I ...
0 votes
0 answers
465 views

In PHP 5.4 How much memory is allocated to a script, when we set memory_limit to -1 ? Memory exhausted error will not come until all memory is exhausted . But will this affect my other processes too? ...
9 votes
1 answer
3k views

The list of backwards-incompatible changes for PHP 7.4 contain the following note: Serialization The o serialization format has been removed. As it is never produced by PHP, this may only break ...
4 votes
1 answer
483 views

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 ...

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