array(3) {
[0]=>
int(23)
[1]=>
int(1)
[2]=>
int(22)
}
int(22)
Fatal error: Uncaught TypeError: array_keys(): Argument #1 ($array) must be of type array, int given in /in/nDZlX:7
Stack trace:
#0 /in/nDZlX(7): array_keys(23)
#1 {main}
thrown in /in/nDZlX on line 7
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
array(3) {
[0]=>
int(23)
[1]=>
int(1)
[2]=>
int(22)
}
int(22)
Warning: array_keys() expects parameter 1 to be array, int given in /in/nDZlX on line 7
NULL
array(3) {
[0]=>
int(23)
[1]=>
int(1)
[2]=>
int(22)
}
int(22)
Warning: array_keys() expects parameter 1 to be array, integer given in /in/nDZlX on line 7
NULL