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<?php echo "Numeric strings will be converted into an integer\n"; var_dump(array( 1 => 1, '1' => '1', 's1' => 's1', )); echo "Booleans will be converted into an integer:\n"; var_dump(array( 0 => 0, 1 => 1, true => true, false => false, )); echo "NULL will be converted into an empty string:\n"; var_dump(array( '' => '', null => null, )); echo "A resource will be converted into an integer:\n"; var_dump(array( new stdClass => 'new stdClass', ));
Output for 8.3.0 - 8.3.6
Numeric strings will be converted into an integer array(2) { [1]=> string(1) "1" ["s1"]=> string(2) "s1" } Booleans will be converted into an integer: array(2) { [0]=> bool(false) [1]=> bool(true) } NULL will be converted into an empty string: array(1) { [""]=> NULL } A resource will be converted into an integer: Fatal error: Uncaught TypeError: Cannot access offset of type stdClass on array in /in/UhMaE:26 Stack trace: #0 {main} thrown in /in/UhMaE on line 26
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Numeric strings will be converted into an integer array(2) { [1]=> string(1) "1" ["s1"]=> string(2) "s1" } Booleans will be converted into an integer: array(2) { [0]=> bool(false) [1]=> bool(true) } NULL will be converted into an empty string: array(1) { [""]=> NULL } A resource will be converted into an integer: Fatal error: Uncaught TypeError: Illegal offset type in /in/UhMaE:26 Stack trace: #0 {main} thrown in /in/UhMaE on line 26
Process exited with code 255.
Output for 4.3.9 - 4.3.11, 4.4.0 - 4.4.9, 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, 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
Numeric strings will be converted into an integer array(2) { [1]=> string(1) "1" ["s1"]=> string(2) "s1" } Booleans will be converted into an integer: array(2) { [0]=> bool(false) [1]=> bool(true) } NULL will be converted into an empty string: array(1) { [""]=> NULL } A resource will be converted into an integer: Warning: Illegal offset type in /in/UhMaE on line 26 array(0) { }
Output for 4.3.2 - 4.3.8
Numeric strings will be converted into an integer array(2) { [1]=> string(1) "1" ["s1"]=> string(2) "s1" } Booleans will be converted into an integer: array(2) { [0]=> bool(false) [1]=> bool(true) } NULL will be converted into an empty string: array(1) { [""]=> NULL } A resource will be converted into an integer: array(0) { }
Output for 4.3.0 - 4.3.1
Numeric strings will be converted into an integer array(2) { [1]=> string(1) "1" ["s1"]=> string(2) "s1" } Booleans will be converted into an integer: array(2) { [0]=> int(0) [1]=> int(1) } NULL will be converted into an empty string: array(1) { [""]=> NULL } A resource will be converted into an integer: array(0) { }

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