string(1) "z"
Fatal error: Uncaught TypeError: Unsupported operand types: string + int in /in/rKcVo:4
Stack trace:
#0 {main}
thrown in /in/rKcVo on line 4
Process exited with code 255.
string(1) "z"
Warning: A non-numeric value encountered in /in/rKcVo on line 4
int(1)
string(2) "ab"
Warning: A non-numeric value encountered in /in/rKcVo on line 7
int(1)