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<?php function arr($array) { var_dump(key($array)); var_dump(current($array)); } $a = array('a' => 1, 'b' => 2, 'c' => 3); arr($a); next($a); arr($a); var_dump(key($array)); var_dump(current($array));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(1) "a" int(1) string(1) "b" int(2) Warning: Undefined variable $array in /in/U2mTH on line 14 Fatal error: Uncaught TypeError: key(): Argument #1 ($array) must be of type array, null given in /in/U2mTH:14 Stack trace: #0 /in/U2mTH(14): key(NULL) #1 {main} thrown in /in/U2mTH on line 14
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
string(1) "a" int(1) string(1) "b" int(2) Notice: Undefined variable: array in /in/U2mTH on line 14 Warning: key() expects parameter 1 to be array, null given in /in/U2mTH on line 14 NULL Notice: Undefined variable: array in /in/U2mTH on line 15 Warning: current() expects parameter 1 to be array, null given in /in/U2mTH on line 15 NULL
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.3.32 - 7.3.33, 7.4.26
string(1) "a" int(1) string(1) "b" int(2) Warning: key() expects parameter 1 to be array, null given in /in/U2mTH on line 14 NULL Warning: current() expects parameter 1 to be array, null given in /in/U2mTH on line 15 NULL
Output for 5.2.4 - 5.2.17
string(1) "a" int(1) string(1) "b" int(2) Warning: key(): Passed variable is not an array or object in /in/U2mTH on line 14 bool(false) Warning: current(): Passed variable is not an array or object in /in/U2mTH on line 15 bool(false)
Output for 4.3.2 - 4.3.11, 4.4.0, 4.4.2 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.3
string(1) "a" int(1) string(1) "a" int(1) Warning: key(): Passed variable is not an array or object in /in/U2mTH on line 14 bool(false) Warning: current(): Passed variable is not an array or object in /in/U2mTH on line 15 bool(false)
Output for 4.4.1
string(1) "a" int(1) string(1) "b" int(2) Notice: Undefined variable: array in /in/U2mTH on line 14 Warning: key(): Passed variable is not an array or object in /in/U2mTH on line 14 bool(false) Notice: Undefined variable: array in /in/U2mTH on line 15 Warning: current(): Passed variable is not an array or object in /in/U2mTH on line 15 bool(false)
Output for 4.3.0 - 4.3.1
string(1) "a" int(1) string(1) "a" int(1) Warning: key() [http://www.php.net/function.key]: Passed variable is not an array or object in /in/U2mTH on line 14 bool(false) Warning: current() [http://www.php.net/function.current]: Passed variable is not an array or object in /in/U2mTH on line 15 bool(false)
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