uopz_flags

(PECL uopz 2 >= 2.0.2, PECL uopz 5, PECL uopz 6, PECL uopz 7)

uopz_flagsGet or set flags on function or class

Descripción

uopz_flags(string $function, int $flags = PHP_INT_MAX): int
uopz_flags(string $class, string $function, int $flags = PHP_INT_MAX): int

Get or set the flags on a class or function entry at runtime

Parámetros

class

The name of a class

function

The name of the function. If class is given and an empty string is passed as function, uopz_flags() gets or sets the flags of the class entry.

flags

A valid set of ZEND_ACC_ flags. If omitted, uopz_flags() acts as getter.

Valores devueltos

If setting, returns old flags, else returns flags

Errores/Excepciones

As of PHP 7.4.0, if the parameter flags is passed, uopz_flags() throws a RuntimeException, if OPcache is enabled, and the class entry of class or the function entry of function is immutable.

Historial de cambios

Versión Descripción
PECL uopz 5.0.0 The flags parameter is now optional. Formerly, ZEND_ACC_FETCH had to be passed to use uopz_flags() as getter.

Ejemplos

Ejemplo #1 uopz_flags() example

<?php
class Test {
public function
method() {
return
__CLASS__;
}
}

$flags = uopz_flags("Test", "method");

var_dump((bool) (uopz_flags("Test", "method") & ZEND_ACC_PRIVATE));
var_dump((bool) (uopz_flags("Test", "method") & ZEND_ACC_STATIC));

var_dump(uopz_flags("Test", "method", $flags|ZEND_ACC_STATIC|ZEND_ACC_PRIVATE));

var_dump((bool) (uopz_flags("Test", "method") & ZEND_ACC_PRIVATE));
var_dump((bool) (uopz_flags("Test", "method") & ZEND_ACC_STATIC));
?>

El resultado del ejemplo sería:

bool(false)
bool(false)
int(1234567890)
bool(true)
bool(true)

Ejemplo #2 "Unfinalize" a Class

<?php
final class MyClass
{
}

$flags = uopz_flags(MyClass::class, '');
uopz_flags(MyClass::class, '', $flags & ~ZEND_ACC_FINAL);
var_dump((new ReflectionClass(MyClass::class))->isFinal());
?>

El resultado del ejemplo sería:

bool(false)
add a note

User Contributed Notes 2 notes

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1
ASchmidt at Anamera dot net
5 years ago
If the method name is set to an empty string, then the flags for the CLASS itself will be affected, instead of an individual method. This can be used to remove the "final" attribute from a class.
<?php
declare(strict_types=1);

final class
MyClass { function mymethod() {} };
uopz_flags(MyClass::class, '', 0);
?>

Note: Although not documented, setting the method to NULL will also target the CLASS flags, however, that syntax will clash with strict types because of the developer's improper function signature.
up
0
ASchmidt at Anamera dot net
3 years ago
To clarify the above hint:
"...the class entry of class or the function entry of function is immutable"

Neither PHP class or function definitions have any "immutable" keyword - so this note is confusing, as it implies that a PHP programmer has any control over this. In reality, the "immutable" state mentioned is an internally-controlled optimization/shared memory feature of OPcache.

Consequently, if one has a need to set (alter) the flags of a PHP class or function by means of "uopz_flags()", then it is necessary to EXCLUDE the PHP script of the referenced class or function from OPcache, using the "opcache.blacklist_filename" INI parameter.
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