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<?php class C implements ArrayAccess { public $data = array( "foo"=>"bar" ); public function offsetExists ( $offset ): bool{ return array_key_exists((string)$offset,$this->data); } public function offsetGet ( mixed $offset ){ return $this->data[$offset]; } public function offsetSet ( $offset , $value ): void { $this->data[$offset]=$value; } public function offsetUnset ( $offset ): void { unset($this->data[$offset]); } } $o=new C(); if(array_key_exists('foo',$o)){ echo "ArrayAccess seems to work"; }else{ echo "ArrayAccess seems broken"; }
Output for 8.0.0alpha1 - beta3
Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, C given in /in/TcNR4:24 Stack trace: #0 {main} thrown in /in/TcNR4 on line 24
Process exited with code 255.
Output for 7.4.0 - 7.4.10
Fatal error: Declaration of C::offsetGet(mixed $offset) must be compatible with ArrayAccess::offsetGet($offset) in /in/TcNR4 on line 10
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.22
Fatal error: Declaration of C::offsetGet(mixed $offset) must be compatible with ArrayAccess::offsetGet($offset) in /in/TcNR4 on line 3
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/TcNR4 on line 7
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected ':', expecting '{' or ';' in /in/TcNR4 on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/TcNR4 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting '{' in /in/TcNR4 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/TcNR4 on line 3
Process exited with code 255.