3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Obj implements ArrayAccess { public $container = [ "one" => 1, "two" => 2, "three" => 3, ]; public function offsetSet($offset, $value): void { if (is_null($offset)) { $this->container[] = $value; } else { $this->container[$offset] = $value; } } public function offsetExists($offset): bool { return isset($this->container[$offset]); } public function offsetUnset($offset): void { unset($this->container[$offset]); } public function offsetGet($offset): mixed { return isset($this->container[$offset]) ? $this->container[$offset] : null; } } $o = new Obj(); if (array_key_exists('a', $o)) { echo "has-a"; } else { echo "NO-a"; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, Obj given in /in/S0GNX:32 Stack trace: #0 {main} thrown in /in/S0GNX on line 32
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Deprecated: array_key_exists(): Using array_key_exists() on objects is deprecated. Use isset() or property_exists() instead in /in/S0GNX on line 32 NO-a
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33
NO-a
Output for 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/S0GNX on line 10
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
Parse error: syntax error, unexpected '[' in /in/S0GNX on line 4
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/S0GNX on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/S0GNX 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/S0GNX on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/S0GNX on line 3
Process exited with code 255.
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