php - Using ? and : operators compared to { and } -

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इस सवाल का पहले से ही एक उत्तर है: < / P>

  • 54 जवाब

    मैंने कई स्थितियों में देखा है स्टैक ओवरफ्लो पर, मैं लोगों को उन उदाहरणों का उपयोग कर देखता हूं जो: 

      $ Var = isset ($ _ सत्र ['कुंजी'])? $ _SESSION ['कुंजी']: शून्य;   
     वास्तविक संरचना और प्रतिनिधित्व क्या है? क्या कोई निष्पादन सुधार सर्वर एक साधारण  अगर  और  else  स्टेटमेंट की तुलना में इन ऑपरेटरों का उपयोग करने के साथ-साथ है? या यह आम तौर पर व्यक्तिगत प्रोग्रामिंग प्राथमिकता के नीचे है?   
     
     
     यह सिर्फ छोटा कोड बनाने के लिए है यह समतुल्य है:  
      यदि (कुछ कंडिशन) // do जर सत्य है तो / अन्यथा   
     या आपके कोड के लिए ...  
      यदि ($ _SESSION ['कुंजी']) $ Var = $ _SESSION ['कुंजी']; और $ var = नल;

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