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run code in 150+ php & hhvm versions
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<?php class Test extends \ArrayObject { public $defaults = array( 'k3' => 'v3', ); public function __construct() { parent::__construct( array( 'k1' => 'v1', 'k2' => 'v2', 'k3' => null, ) ); } public function offsetGet( $index ) { if ( isset( $this[$index] ) ) { return parent::offsetGet( $index ); } elseif ( isset( $this->defaults[ $index ] ) ) { return $this->defaults[ $index ]; } else { return null; } } } $o = new Test(); var_dump( isset( $o['k1'] ) ); var_dump( isset( $o['k3'] ) );
Output for 5.3.11 - 5.3.29, 5.4.1 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(true) bool(false)
Output for 5.3.0 - 5.3.10, 5.4.0
bool(true) bool(true)
Output for 5.0.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/fnKPG on line 2 bool(true) bool(true)
Output for 4.4.2 - 4.4.9
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/fnKPG on line 2 Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/fnKPG on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/fnKPG on line 2 Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/fnKPG on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/fnKPG on line 2 Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/fnKPG on line 4
Process exited with code 255.