intval() with negative base prefixed string does not detect base
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Nobody has claimed this yet.
Bug
Extension: standard
Status: Verified
- Dominant language
- C
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Description
Description
The following code:
<?php
$s = "-0b11111111111111111111111111111111111111111111111111111111111111111111111111111";
$v1 = intval($s, 2);
var_dump($v1);
$v2 = intval($s);
var_dump($v2);
var_dump((int) $s);
Resulted in this output:
int(-9223372036854775808)
int(0)
int(0)
But I expected this output instead:
int(-9223372036854775808)
int(-9223372036854775808)
int(0)
Similarly, if we use $base = 16
Note the 0o prefix is not supported (which is what initially led me down this rabbit hole).
PHP Version
PHP 8.3
Operating System
No response
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the PHP 8.3 example with intval() on the negative 0b-prefixed string and compare explicit base 2, implicit base detection, and integer casting. Done means deciding and testing whether implicit base detection should produce the same saturated negative integer as the explicit base case, while preserving the documented lack of 0o support.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- php
- Domain
- backend
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100