php / php/php-src

Allow class constants in strings

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Feature Status: Requires RFC
Dominant language
C
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Description

Description

Strings should allow class constants (and class) https://3v4l.org/hTnNv

<?php
echo "{$foo::$Bar}\n"; // ok
echo "{$foo::Bar}\n"; // parse error
echo "{$foo::class}\n"; // parse error

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First steps

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  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the 3v4l.org reproduction and compare the accepted {$foo::$Bar} form with the failing {$foo::Bar} and {$foo::class} forms. Trace the PHP interpreter's string interpolation and parsing entry points, then verify that both requested forms parse and produce the expected values without regressing the existing form.

Written by the indexing model from the issue text.

Assessment

Tech stack
php
Domain
compilers
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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