rfc:binary_string_comparison
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rfc:binary_string_comparison [2014/08/16 08:18] – binary marked strings mabe | rfc:binary_string_comparison [2014/08/17 19:41] – rm open issues mabe | ||
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Line 135: | Line 135: | ||
bool(false) | bool(false) | ||
+ | === sorting of strings === | ||
+ | (http:// | ||
+ | |||
+ | <? | ||
+ | | ||
+ | $arr = array(' | ||
+ | | ||
+ | echo "Sort regular: | ||
+ | sort($arr); | ||
+ | var_dump($arr); | ||
+ | | ||
+ | echo "Sort numeric: | ||
+ | sort($arr, SORT_NUMERIC); | ||
+ | var_dump($arr); | ||
+ | | ||
+ | echo "Sort binary: | ||
+ | sort($arr, SORT_STRING); | ||
+ | var_dump($arr); | ||
+ | |||
+ | Current Behavior: | ||
+ | |||
+ | Sort regular: | ||
+ | array(6) { | ||
+ | [0] => | ||
+ | string(2) " | ||
+ | [1] => | ||
+ | string(1) " | ||
+ | [2] => | ||
+ | string(2) " | ||
+ | [3] => | ||
+ | int(2) | ||
+ | [4] => | ||
+ | int(3) | ||
+ | [5] => | ||
+ | string(2) " | ||
+ | } | ||
+ | Sort numeric: | ||
+ | array(6) { | ||
+ | [0] => | ||
+ | string(2) " | ||
+ | [1] => | ||
+ | string(1) " | ||
+ | [2] => | ||
+ | int(2) | ||
+ | [3] => | ||
+ | string(2) " | ||
+ | [4] => | ||
+ | string(2) " | ||
+ | [5] => | ||
+ | int(3) | ||
+ | } | ||
+ | Sort binary: | ||
+ | array(6) { | ||
+ | [0] => | ||
+ | string(2) " | ||
+ | [1] => | ||
+ | string(2) " | ||
+ | [2] => | ||
+ | string(2) " | ||
+ | [3] => | ||
+ | string(1) " | ||
+ | [4] => | ||
+ | int(2) | ||
+ | [5] => | ||
+ | int(3) | ||
+ | } | ||
+ | |||
+ | Changed Behavior: | ||
+ | |||
+ | Sort regular: | ||
+ | array(6) { | ||
+ | [0]=> | ||
+ | string(2) " | ||
+ | [1]=> | ||
+ | string(2) " | ||
+ | [2]=> | ||
+ | string(1) " | ||
+ | [3]=> | ||
+ | int(2) | ||
+ | [4]=> | ||
+ | int(3) | ||
+ | [5]=> | ||
+ | string(2) " | ||
+ | } | ||
+ | Sort numeric: | ||
+ | array(6) { | ||
+ | [0]=> | ||
+ | string(2) " | ||
+ | [1]=> | ||
+ | string(1) " | ||
+ | [2]=> | ||
+ | string(2) " | ||
+ | [3]=> | ||
+ | int(2) | ||
+ | [4]=> | ||
+ | string(2) " | ||
+ | [5]=> | ||
+ | int(3) | ||
+ | } | ||
+ | Sort binary: | ||
+ | array(6) { | ||
+ | [0]=> | ||
+ | string(2) " | ||
+ | [1]=> | ||
+ | string(2) " | ||
+ | [2]=> | ||
+ | string(2) " | ||
+ | [3]=> | ||
+ | string(1) " | ||
+ | [4]=> | ||
+ | int(2) | ||
+ | [5]=> | ||
+ | int(3) | ||
+ | } | ||
===== Backward Incompatible Changes ===== | ===== Backward Incompatible Changes ===== | ||
- | Existing code that relies on the current behavior on non-strict string to string comparison will only produce the originally expected result if the string representation is the same. This can be easily resolved by explicitly casting one of the operands to an integer or float. | + | Existing code that relies on the current behavior on non-strict string to string comparison will only produce the originally expected result if the string representation is the same. This can be easily resolved by explicitly casting one of the operands to an integer or float respectively define the sorting algorithm. |
===== Proposed PHP Version(s) ===== | ===== Proposed PHP Version(s) ===== | ||
As this is a backwards-incompatible change, this RFC targets PHP.next. | As this is a backwards-incompatible change, this RFC targets PHP.next. | ||
- | |||
- | ===== Open Issues ===== | ||
- | How to note behavior change? | ||
- | ... Is it enough to note it in the change-log or should we trigger a E_DEPRECATED/ | ||
===== Unaffected PHP Functionality ===== | ===== Unaffected PHP Functionality ===== | ||
Line 168: | Line 278: | ||
===== References ===== | ===== References ===== | ||
- | http:// | + | * http:// |
- | http:// | + | |
- | http:// | + | |
- | https:// | + | * http:// |
+ | * https:// | ||
===== Rejected Features ===== | ===== Rejected Features ===== | ||
None so far. | None so far. |
rfc/binary_string_comparison.txt · Last modified: 2017/09/22 13:28 by 127.0.0.1