Bug #80938 [Com]: ParseError with class_exists & property promotion
Edit report at https://bugs.php.net/bug.php?id=80938&edit=1
ID: 80938
Comment by: danack@php.net
Reported by: jr at rushlow dot dev
Summary: ParseError with class_exists & property promotion
Status: Not a bug
Type: Bug
Package: Class/Object related
PHP Version: 7.4.16
Block user comment: N
Private report: N
New Comment:
https://3v4l.org/oEW4q even
Previous Comments:
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[2021-04-05 16:22:56] jr at rushlow dot dev
That makes sense. But to put it another way for clarity - calling class_exists() on a class that is
not correctly defined for the PHP version used a runtime cannot be done?
If that is the case - should we change the docs to reflect this?
"class_exists â Checks if the class has been defined" -> https://www.php.net/manual/en/function.class-exists.php
I'll start a thread in internals (to further discuss options) if the above is true as it would
seem that one can no longer use class_exists() in code bases that support multiple PHP versions.
Granted I may be missing something obvious :)
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[2021-04-05 16:22:25] danack@php.net
Incidentally, the reproduce code gives a different error https://3v4l.org/oEW4q:
Fatal error: Uncaught Error: Undefined constant "PromoteConstructorProperty" in
/in/oEW4q:11
class_exists(PromoteConstructorProperty);
should probably be:
class_exists(PromoteConstructorProperty::class);
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[2021-04-05 16:05:30] nikic@php.net
class_exists() with autoload:true (the default) will load the class. If the class declaration
doesn't parse, you get an error, as usual.
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[2021-04-05 16:03:13] jr at rushlow dot dev
Description:
------------
Calling class_exists() on a class that uses constructor property promotion results in a ParseError.
Property promotion is only available in PHP8.0+ but one would expect that you could use
class_exists() regardless class implementation.
Test script:
---------------
// See https://github.com/rushlow-development/attribute-test
for a simple reproducer w/ composer && phpunit
<?php
class PromoteConstructorProperty
{
public function __construct(
public string $var
) {
}
}
$bool = class_exists(PromoteConstructorProperty);
Expected result:
----------------
$bool = true
Actual result:
--------------
ParseError: syntax error, unexpected 'public' (T_PUBLIC), expecting variable (T_VARIABLE)
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