<?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());
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.
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)
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)