3v4l.org

run code in 300+ PHP versions simultaneously
<?php class EmptyIterator implements Iterator, Countable { /** No operation. * @return void */ function rewind() { // nothing to do } /** @return \c false */ function valid() { return false; } /** This function must not be called. It throws an exception upon access. * @throw Exception * @return void */ function current() { throw new Exception('Accessing the value of an EmptyIterator'); } /** This function must not be called. It throws an exception upon access. * @throw Exception * @return void */ function key() { throw new Exception('Accessing the key of an EmptyIterator'); } /** No operation. * @return void */ function next() { // nothing to do } /** * @return int */ function count() { return 0; } } $ei = new EmptyIterator; echo count($ei);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Cannot declare class EmptyIterator, because the name is already in use in /in/r5nDf on line 2
Process exited with code 255.
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Fatal error: Cannot redeclare class EmptyIterator in /in/r5nDf on line 2
Process exited with code 255.
Output for 5.1.0 - 5.1.6
Fatal error: Cannot redeclare class emptyiterator in /in/r5nDf on line 2
Process exited with code 255.
Output for 5.0.5
Fatal error: Interface 'Countable' not found in /in/r5nDf on line 2
Process exited with code 255.
Output for 5.0.0 - 5.0.4
Fatal error: Class 'Countable' not found in /in/r5nDf on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/r5nDf on line 2
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/r5nDf on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/r5nDf on line 2
Process exited with code 255.
preferences:
251.16 ms | 401 KiB | 314 Q