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[intl] Weird numeric sort in Collator #18566
Description
Description
The following code:
<?php
$arr = [
'2023-02-04 14:00:00',
'2023-01-08 12:00:00',
'2023-01-03 12:00:00',
'2023-01-03 12:00:00',
'2021-01-03 12:00:00',
'2023-01-05 14:00:00',
'2024-01-03 12:00:00',
'2023-01-03 12:00:00',
];
$coll = Collator::create('de');
$coll->asort($arr, Collator::SORT_REGULAR);
echo json_encode($arr, JSON_PRETTY_PRINT);Resulted in this output:
{
"4": "2021-01-03 12:00:00",
"0": "2023-02-04 14:00:00",
"1": "2023-01-08 12:00:00",
"2": "2023-01-03 12:00:00",
"3": "2023-01-03 12:00:00",
"5": "2023-01-05 14:00:00",
"7": "2023-01-03 12:00:00",
"6": "2024-01-03 12:00:00"
}%
But I expected this output instead:
{
"4": "2021-01-03 12:00:00",
"2": "2023-01-03 12:00:00",
"3": "2023-01-03 12:00:00",
"7": "2023-01-03 12:00:00",
"5": "2023-01-05 14:00:00",
"1": "2023-01-08 12:00:00",
"0": "2023-02-04 14:00:00",
"6": "2024-01-03 12:00:00"
}
PHP Version
Since the dawn of time up to 8.4.7 apparently introduced in PHP6(!)
Operating System
any
Activity
arokettu commentedon May 15, 2025
The ultimate cause seems to be
collator_convert_string_to_number_if_possiblethinking that it's possible to convert to number and making them all (int)2021, (int)2023, (int)2024php-src/ext/intl/collator/collator_convert.c
Line 322 in 2e70a89
php-src/ext/intl/collator/collator_is_numeric.c
Line 207 in 2e70a89
[-]Weird numeric sort in collator[/-][+][intl] Weird numeric sort in Collator[/+]Fix phpGH-18566: [intl] Weird numeric sort in Collator