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run code in 300+ PHP versions simultaneously
<?php class It implements Iterator { private $arr = [1,2,3]; public function key() { echo __METHOD__ . "\n"; return key($this->arr); } public function current() { echo __METHOD__ . "\n"; return current($this->arr); } public function rewind() { echo __METHOD__ . "\n"; reset($this->arr); } public function next() { echo __METHOD__ . "\n"; next($this->arr); } public function valid() { echo __METHOD__ . "\n"; return key($this->arr) === null; } } $it = new It; foreach ($it as $k => $v) {}
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Return type of It::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/dOr1H on line 13 Deprecated: Return type of It::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/dOr1H on line 25 Deprecated: Return type of It::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/dOr1H on line 7 Deprecated: Return type of It::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/dOr1H on line 31 Deprecated: Return type of It::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/dOr1H on line 19 It::rewind It::valid
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
It::rewind It::valid
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/dOr1H on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/dOr1H on line 5
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/dOr1H 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/dOr1H on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/dOr1H on line 3
Process exited with code 255.
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