All Questions
Tagged with php-internals php
235
questions
0
votes
0
answers
94
views
Adding new reference to any item in array affects behaviour of the array
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 ...
- 16
0
votes
1
answer
58
views
in php programming where is the array data and the address being stored?
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
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
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
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
4
votes
1
answer
266
views
Where is PHP echo implemented in the source?
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 ...
- 1,877
0
votes
0
answers
424
views
PHP memory limit -1 unlinimited
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
What was PHP's "o" serialization format for?
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 ...
- 1,283
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
1
vote
1
answer
508
views
What are the limits on session names in PHP?
The PHP docs on session_name() say:
It should contain only alphanumeric characters; it should be short and descriptive (i.e. for users with enabled cookie warnings). ... The session name can't ...
- 37k
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
1
vote
1
answer
507
views
How can I overwrite an internal Zend function with a PHP extension?
Hope this isn't too silly a question to ask. I'm fairly new to C and PHP internals but looking to learn more about them.
I've recently began looking into development of PHP extensions. I'm trying to ...
- 11
0
votes
1
answer
77
views
Passing HashTable data from php.ini to an extension method: corrupted values
I am trying to make a PHP (7.4) extension use in an extension method a setting from php.ini (like myext.map=key1=val1,key2=val2;) parsed as an associative array. I want the parsing to happen in ...
- 4,284
4
votes
1
answer
700
views
Why does php allow invalid return type declerations it knows it can't allow?
As far as I can tell php has the ability to prevent a return type from being declared where it knows it's problematic.
class Foo {
public function __clone(): Baz {
return new Baz;
}
}
...
- 83