--TEST-- substr_compare() --FILE-- 0); var_dump(substr_compare("abcde", "cd", 1, 2) < 0); var_dump(substr_compare("abcde", "abc", 5, 1)); var_dump(substr_compare("abcde", "abcdef", -10, 10) < 0); var_dump(substr_compare("abcde", "abc", 0, 0)); echo "Test\n"; try { substr_compare("abcde", "abc", 0, -1); } catch (\ValueError $e) { echo $e->getMessage() . "\n"; } var_dump(substr_compare("abcde", "abc", -1, NULL, -5) > 0); ?> --EXPECT-- bool(true) bool(true) int(0) int(0) int(0) bool(true) bool(true) int(-1) bool(true) int(0) Test substr_compare(): Argument #4 ($length) must be greater than or equal to 0 bool(true)