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run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(substr_compare('abcd', 'bcd', 1, null, false)); var_dump(substr_compare('abcd', 'bcd', 1)); var_dump(substr_compare('abcd', 'BCD', 1, null, true)); var_dump(substr_compare('abcd', 'BCD', 1, 3, true));
based on GSERH
Output for 5.0.0 - 5.1.2, 5.5.24 - 5.6.28, 7.0.0 - 7.1.0
int(0) int(0) int(0) int(0)
Output for hhvm-3.12.0
Warning: The length must be greater than zero in /in/F1WQG on line 2 bool(false) int(0) Warning: The length must be greater than zero in /in/F1WQG on line 5 bool(false) int(0)
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.5 - 5.4.45
Warning: substr_compare(): The length must be greater than zero in /in/F1WQG on line 2 bool(false) int(0) Warning: substr_compare(): The length must be greater than zero in /in/F1WQG on line 5 bool(false) int(0)
Output for 5.1.3 - 5.1.4
Warning: substr_compare(): The length must be greater than zero in /in/F1WQG on line 2 bool(false) int(0) Warning: substr_compare(): The length must be greater than zero in /in/F1WQG on line 5 bool(false) Warning: substr_compare(): The start position cannot exceed initial string length in /in/F1WQG on line 6 bool(false)
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: substr_compare() in /in/F1WQG on line 2
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: substr_compare() in /in/F1WQG on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: substr_compare() in /in/F1WQG on line 2