rfc:deprecate_curly_braces_array_access
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| rfc:deprecate_curly_braces_array_access [2019/07/02 17:17] – Improve RFC introduction and discussion sections theodorejb | rfc:deprecate_curly_braces_array_access [2019/08/10 23:19] (current) – derick | ||
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| ====== PHP RFC: Deprecate curly brace syntax for accessing array elements and string offsets ====== | ====== PHP RFC: Deprecate curly brace syntax for accessing array elements and string offsets ====== | ||
| * Date: 2019-03-12 | * Date: 2019-03-12 | ||
| - | * Author: Andrey Gromov < | + | * Author: Andrey Gromov < |
| - | * Status: | + | * Status: |
| * Discussion: https:// | * Discussion: https:// | ||
| - | * Target version: PHP 7.4 | + | * Targets: PHP 7.4 |
| - | * Implementation: | + | * Implementation: |
| ===== Introduction ===== | ===== Introduction ===== | ||
| Line 54: | Line 54: | ||
| {$one, $two} = $array; // Parse error: syntax error, unexpected ',' | {$one, $two} = $array; // Parse error: syntax error, unexpected ',' | ||
| </ | </ | ||
| - | |||
| - | Finally, supporting the curly brace syntax prevents using this syntax | ||
| - | for more valuable features in the future (e.g. array/ | ||
| - | offset access, " | ||
| Line 71: | Line 67: | ||
| < | < | ||
| - | Warning: Array and string offset access syntax with curly braces is deprecated in test.php | + | Deprecated: Array and string offset access syntax with curly braces is deprecated in test.php line 3 |
| int(2) | int(2) | ||
| </ | </ | ||
| Line 95: | Line 91: | ||
| should be used instead of relying on syntax that can be used for both strings | should be used instead of relying on syntax that can be used for both strings | ||
| and arrays (and thus doesn' | and arrays (and thus doesn' | ||
| + | |||
| + | |||
| + | ==== How frequently is the curly brace syntax used? ==== | ||
| + | Nikita Popov checked the top 2k Composer packages, and found ~2.2k | ||
| + | individual uses of the curly brace array syntax. Compared to the 888.3k | ||
| + | total array accesses in the data set, usage of the alternative syntax is | ||
| + | about 0.25%. However, even this number is inflated somewhat due to | ||
| + | duplicate packages (for example, there are two packages that mirror the | ||
| + | WordPress Core repository, each with 182 usages). 92% of usages in the | ||
| + | top 2k packages are in just 25 unique projects. | ||
| ==== Will it be too much work for people to migrate code away from the curly brace syntax? ==== | ==== Will it be too much work for people to migrate code away from the curly brace syntax? ==== | ||
| A migration script has been implemented alongside the deprecation patch: | A migration script has been implemented alongside the deprecation patch: | ||
| - | https:// | + | https://gist.github.com/theodorejb/763b83a43522b0fc1755a537663b1863 |
| Line 107: | Line 113: | ||
| ===== Vote ===== | ===== Vote ===== | ||
| - | Deprecate curly brace array and string offset syntax in PHP 7.4? Yes/No. | + | Started 3 July 2019. Ends 17th July 2019 |
| + | <doodle title=" | ||
| + | | ||
| + | | ||
| + | </ | ||
| ===== Future Scope ===== | ===== Future Scope ===== | ||
| Remove the feature entirely (replacing the deprecation warning | Remove the feature entirely (replacing the deprecation warning | ||
| with a compiler error) in PHP 8 or another future release. | with a compiler error) in PHP 8 or another future release. | ||
| - | |||
| ===== References ===== | ===== References ===== | ||
| + | Current discussion: https:// | ||
| + | |||
| Discussion about deprecation in June 2008: https:// | Discussion about deprecation in June 2008: https:// | ||
| Discussion about deprecation in November 2005: https:// | Discussion about deprecation in November 2005: https:// | ||
rfc/deprecate_curly_braces_array_access.1562087867.txt.gz · Last modified: 2019/07/02 17:17 by theodorejb