1.2.313. Crc32() Might Be Negative¶
crc32() may return a negative number, on 32 bits platforms.
According to the manual : Because PHP's integer type is signed many CRC32 checksums will result in negative integers on 32 bits platforms. On 64 bits installations, all crc32() results will be positive integers though.
<?php
// display the checksum with %u, to make it unsigned
echo sprintf('%u', crc32($str));
// turn the checksum into an unsigned hexadecimal
echo dechex(crc32($str));
// avoid concatenating crc32 to a string, as it may be negative on 32bits platforms
echo 'prefix'.crc32($str);
?>
See also crc32().
1.2.313.1. Connex PHP features¶
1.2.313.1.1. Specs¶
Short name |
Php/Crc32MightBeNegative |
Rulesets |
|
Exakat since |
0.11.0 |
PHP Version |
All |
Severity |
Major |
Time To Fix |
Slow (1 hour) |
Precision |
Very high |
Available in |