在 PHP 中，报错：”Class ‘weibo//rests//oauth2//DateTime’ not found” 的分析与解决

1、在 Yii 2 中，报错：”Class ‘weibo//rests//oauth2//DateTime’ not found”

$urlSigner->signParams($route, false, (new DateTime())->add(new DateInterval('PT1H')));

{
    "name": "Exception",
    "message": "Class 'weibo//rests//oauth2//DateTime' not found",
    "code": 0,
    "type": "Error",
    "file": "E://wwwroot//channel-pub-api//weibo//rests//oauth2//AuthorizeAction.php",
    "line": 129,
    "stack-trace": [
        "#0 [internal function]: weibo//rests//oauth2//AuthorizeAction->run()",
        "#1 E://wwwroot//channel-pub-api//vendor//yiisoft//yii2//base//Action.php(94): call_user_func_array(Array, Array)",
        "#2 E://wwwroot//channel-pub-api//vendor//yiisoft//yii2//base//Controller.php(157): yii//base//Action->runWithParams(Array)",
        "#3 E://wwwroot//channel-pub-api//vendor//yiisoft//yii2//base//Module.php(528): yii//base//Controller->runAction('authorize', Array)",
        "#4 E://wwwroot//channel-pub-api//vendor//yiisoft//yii2//web//Application.php(103): yii//base//Module->runAction('v1/oauth2/autho...', Array)",
        "#5 E://wwwroot//channel-pub-api//vendor//yiisoft//yii2//base//Application.php(386): yii//web//Application->handleRequest(Object(yii//web//Request))",
        "#6 E://wwwroot//channel-pub-api//weibo//web//index.php(17): yii//base//Application->run()",
        "#7 {main}"
    ]
}

2、由于使用了命名空间，要解决在命名空间中查找类定义的问题，需要在类名之前加上前导 /

$urlSigner->signParams($route, false, (new /DateTime())->add(new /DateInterval('PT1H')));