3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Test implements Iterator { function key(){ return new Baz(); } function next(){} function valid(){ $this->count++; return $this->count < 4; } function current(){ return "foo"; } function rewind(){} } foreach(new Test as $x => $v) var_dump($x, $v);
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Return type of Test::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/XWE3L on line 11 Deprecated: Return type of Test::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/XWE3L on line 9 Deprecated: Return type of Test::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/XWE3L on line 5 Deprecated: Return type of Test::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/XWE3L on line 10 Deprecated: Return type of Test::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/XWE3L on line 12 Deprecated: Creation of dynamic property Test::$count is deprecated in /in/XWE3L on line 10 Warning: Undefined property: Test::$count in /in/XWE3L on line 10 Fatal error: Uncaught Error: Class "Baz" not found in /in/XWE3L:6 Stack trace: #0 /in/XWE3L(15): Test->key() #1 {main} thrown in /in/XWE3L on line 6
Process exited with code 255.
Output for 8.1.0 - 8.1.28
Deprecated: Return type of Test::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/XWE3L on line 11 Deprecated: Return type of Test::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/XWE3L on line 9 Deprecated: Return type of Test::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/XWE3L on line 5 Deprecated: Return type of Test::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/XWE3L on line 10 Deprecated: Return type of Test::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/XWE3L on line 12 Warning: Undefined property: Test::$count in /in/XWE3L on line 10 Fatal error: Uncaught Error: Class "Baz" not found in /in/XWE3L:6 Stack trace: #0 /in/XWE3L(15): Test->key() #1 {main} thrown in /in/XWE3L on line 6
Process exited with code 255.
Output for 8.0.0 - 8.0.30
Warning: Undefined property: Test::$count in /in/XWE3L on line 10 Fatal error: Uncaught Error: Class "Baz" not found in /in/XWE3L:6 Stack trace: #0 /in/XWE3L(15): Test->key() #1 {main} thrown in /in/XWE3L on line 6
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined property: Test::$count in /in/XWE3L on line 10 Fatal error: Uncaught Error: Class 'Baz' not found in /in/XWE3L:6 Stack trace: #0 /in/XWE3L(15): Test->key() #1 {main} thrown in /in/XWE3L on line 6
Process exited with code 255.
Output for 7.3.32 - 7.3.33
Fatal error: Uncaught Error: Class 'Baz' not found in /in/XWE3L:6 Stack trace: #0 /in/XWE3L(15): Test->key() #1 {main} thrown in /in/XWE3L on line 6
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Notice: Undefined property: Test::$count in /in/XWE3L on line 10 Fatal error: Class 'Baz' not found in /in/XWE3L on line 6
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45
Fatal error: Class 'Baz' not found in /in/XWE3L on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/XWE3L 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/XWE3L on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/XWE3L on line 3
Process exited with code 255.

preferences:
219.86 ms | 401 KiB | 312 Q