Warning: Unsupported declare 'strict_types' in D:\phpStudy-duobanben\WWW\wx_chayouqianqi\vendor\sebastian\diff\src\LongestCommonSubsequenceCalculator.php on line 1

Parse error: syntax error, unexpected ':', expecting ';' or '{' in D:\phpStudy-duobanben\WWW\wx_chayouqianqi\vendor\sebastian\diff\src\LongestCommonSubsequenceCalculator.php on line 23