Online PHP editor | output for W4FI6

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: Fatal error: Uncaught TypeError: preg_match(): Argument #2 ($subject) must be of type string, stdClass given in /in/W4FI6:2 Stack trace: #0 /in/W4FI6(2): preg_match('/^-?\\d+$/', Object(stdClass)) #1 {main} thrown in /in/W4FI6 on line 2
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.25, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33: Warning: preg_match() expects parameter 2 to be string, object given in /in/W4FI6 on line 2 bool(false) int(1) bool(false) bool(true) bool(true)
Output for 4.3.3 - 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: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/W4FI6 on line 2 Warning: preg_match() expects parameter 2 to be string, object given in /in/W4FI6 on line 2 bool(false) int(1) bool(false) bool(true) bool(true)
Output for 4.3.0 - 4.3.2: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/W4FI6 on line 2 Notice: Object to string conversion in /in/W4FI6 on line 2 int(0) int(1) bool(false) bool(true) bool(true)