yii determines whether to submit in get mode

Yii2 provides several functions to determine the submission method, in the Yii::$app component.

(Recommended learning: yii framework)

Yii::$app->request->isPost

is used to judge post submission, if it returns 1

Yii::$app->request->isGet

is used to judge get submission, if If it is, return 1

Yii:$app->request->isAjax

for judging ajax submission, if it is, return 1

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