Stdlib: sort() on float arrays with NAN — LogicException not Zend sort order (ext/standard/array.c) #10144

Category

stdlib · php-src-strict

Problem

sort($arr, SORT_REGULAR) on arrays containing float values (including NAN) must use php-src comparison semantics. VM throws LogicException: sort() only supports homogeneous string or integer arrays instead of sorting.

php-src reference

• php/php-src ext/standard/array.c — php_array_sort, php_array_multisort
• php/php-src Zend/zend_sort.c — double compare with NaN ordering

Repro (failure today — verified 2026-06-19)

test/repro/sort_float_nan.php:

<?php
$b = [3.0, NAN, 1.0];
sort($b, SORT_REGULAR);
var_export($b);
echo "\n";

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh
php test/repro/sort_float_nan.php
php bin/vm.php test/repro/sort_float_nan.php'

Scope (PHP-in-PHP first)

Remove or narrow the homogeneous int/string guard — php-src sorts mixed numeric arrays.

Done when (php-src-strict)

• Repro sorts without exception; element order matches Zend
• rsort on same input verified
• Pure int/string sort regressions unchanged
• JIT agrees when sort is JIT-lowering in scope

Verification

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && php bin/vm.php test/repro/sort_float_nan.php'

Related

• Fix __FUNCTION__/__METHOD__ in class const to empty string (#10125) #10137 array_intersect NAN · Stdlib: usort()/uasort()/uksort() — named array:/callback: rejected (ext/standard/array.c) #10048 usort named params · Epic: Self-host critical path — compiler compiles itself (M3→M5) #1492