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Stdlib: chop() / pos() — legacy aliases of rtrim() / current() (ext/standard/string.c, array.c) #4965
Description
Category
stdlib
Problem
Zend registers legacy aliases still used in older code and php-src tests:
| Alias | Target |
|---|---|
chop() |
rtrim() |
pos() |
current() |
This compiler implements rtrim() / current() (via #3312 tracker for current) but function_exists('chop') and function_exists('pos') are false on bin/vm.php.
php-src reference
ext/standard/string.c—PHP_FUNCTION(chop)→php_rtrim()ext/standard/array.c—PHP_FUNCTION(pos)→php_current()
Repro (today)
<?php
var_dump(function_exists('chop'), function_exists('pos'));
echo chop(" hi "), "\n";
$a = [10 => 'x', 20 => 'y'];
reset($a);
echo pos($a), "\n";./script/docker-exec.sh -- bash -lc 'source script/php-env.sh
php repro.php
php bin/vm.php repro.php
'| Runtime | chop / pos exist |
Sample output |
|---|---|---|
| Zend | true / true |
hi / x |
| VM | false / false |
undefined function |
Scope (this repo)
| Module | Path |
|---|---|
| Aliases | thin wrappers in ext/standard/chop.php, pos.php delegating to rtrim / current builtins |
| Registry | ext/standard/Module.php |
| Depends on | #3312 (current() / internal pointer) for pos() behavior |
Done when
-
function_exists('chop')andfunction_exists('pos')true on VM - Repro output matches Zend once Stdlib: key()/current()/next()/prev()/reset()/end() — array internal pointer (ext/standard/array.c parity) #3312 is green
-
script/capability-matrix.phplistschop/pos -
test/compliance/cases/stdlib/chop_pos_alias.phptgreen
Activity
PurHur commentedon Jun 8, 2026
claim: PHP Compiler STD Lib — starting this run
Stdlib: register chop() as rtrim() alias (#4965) (#7696)
PurHur commentedon Jun 8, 2026
Merged via #7696.
What shipped:
chop()registered asstring_rtrim('chop')alias (php-srcext/standard/string.c).pos()was already present.Verification (Docker):
function_exists('chop')/function_exists('pos')→ true on VM and Zend./vendor/bin/phpunit --filter "chop|chop_pos"→ OK (8 tests)php bin/compile.php -l test/fixtures/aot/compile-only/chop_pos_aliases.php→ exit 0