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[2015-07-16 12:53 UTC] olivier dot laviale at gmail dot com
Description:
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is_callable(), with _syntax_only_ activated, only checks the type of the argument, not the actual syntax. For example "+{^not&a*callable}" is considered a callable just because it is a string.
I saw this bug report: https://bugs.php.net/bug.php?id=64185&edit=2, and I get it for class names, but what about function/method names? "+{^not&a*callable}" is definitely not a callable, or the parameter "syntax_only" is incredibly misleading.
Test script:
---------------
var_dump(is_callable('+{^not&a*callable}', true, $callable_name));
var_dump($callable_name);
var_dump(is_callable(123, true));
var_dump(is_callable("123", true));
var_dump(is_callable([ "1", "2" ], true));
Expected result:
----------------
`"+{^not&a*callable}"` shouldn't be considred as a callable, neither should `[ "1", "2" ]`.
bool(false)
null
bool(false)
bool(false)
bool(false)
Actual result:
--------------
bool(true)
string(18) "+{^not&a*callable}"
bool(false)
bool(true)
bool(true)
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Last updated: Sat Oct 25 18:00:02 2025 UTC |
Maybe it could be improved if we check whether an object has __call() defined. But if it has __call() - there's no chance to know exactly what is callable, say this would work $obj->{"+{^not&a*callable}"}();. But I'd rather tend to say it is not a bug. Thanks.Yes, you can invoke methods with invalid names if __call() is implemented, I don't think it's right, but that's a fact. My point is that the following code should return `false`: var_dump(is_callable('+{^not&a*callable}', true, $callable_name)); Unless '+{^not&a*callable}' is a valid function name. Also, I strongly believe that "syntax_only" is misleading. This is not syntax check, this is type check: a string, or an array with two values.> Unless '+{^not&a*callable}' is a valid function name. Well, this is a valid function name, e.g. $func = '+{^not&a*callable}'; runkit_function_copy('strlen', $func); $func('foo'); // => 3 is_callable($func, false); // => true If is_callable($func, false) may return true, is_callable($func, true) should never return false. > Also, I strongly believe that "syntax_only" is misleading. ACK. Therefore I'm changing to doc bug.