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<?php class Foo { public function isFoo() { return $this instanceof Foo; } } class Bar { public function doSomething() { return Foo::isFoo(); } } $bar = new Bar; var_dump($bar->doSomething());
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
Fatal error: Uncaught Error: Non-static method Foo::isFoo() cannot be called statically in /in/5h16k:14 Stack trace: #0 /in/5h16k(19): Bar->doSomething() #1 {main} thrown in /in/5h16k on line 14
Process exited with code 255.
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 7.1.0 - 7.1.23, 7.2.0 - 7.2.33, 7.3.3 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Deprecated: Non-static method Foo::isFoo() should not be called statically in /in/5h16k on line 14 Fatal error: Uncaught Error: Using $this when not in object context in /in/5h16k:6 Stack trace: #0 /in/5h16k(14): Foo::isFoo() #1 /in/5h16k(19): Bar->doSomething() #2 {main} thrown in /in/5h16k on line 6
Process exited with code 255.
Output for 7.3.32 - 7.3.33, 7.4.26
Fatal error: Uncaught Error: Using $this when not in object context in /in/5h16k:6 Stack trace: #0 /in/5h16k(14): Foo::isFoo() #1 /in/5h16k(19): Bar->doSomething() #2 {main} thrown in /in/5h16k on line 6
Process exited with code 255.
Output for 7.0.0 - 7.0.31
Deprecated: Non-static method Foo::isFoo() should not be called statically in /in/5h16k on line 14 Notice: Undefined variable: this in /in/5h16k on line 6 bool(false)
Output for 5.6.0 - 5.6.38
Deprecated: Non-static method Foo::isFoo() should not be called statically, assuming $this from incompatible context in /in/5h16k on line 14 bool(false)
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38
Strict Standards: Non-static method Foo::isFoo() should not be called statically, assuming $this from incompatible context in /in/5h16k on line 14 bool(false)

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