php - Why would I bother using accessor functions? -

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इस सवाल का पहले से ही एक उत्तर है: < 38 उत्तर

यह एक्सेसर फ़ंक्शन है: 

  & lt;? Php वर्ग वर्गनाम {सार्वजनिक $ विशेषता; फ़ंक्शन __get ($ नाम) {वापसी $ this- & gt; $ name; }} $ A = नया वर्गनाम; $ A- & gt; विशेषता = "अन्ना"; $ Name = $ a- & gt; विशेषता; $ नाम गूंज;

?>

?>

और यह एक्सेसर फ़ंक्शंस के बिना सिर्फ एक नियमित वर्ग है: 

  & lt;? Php वर्ग वर्गनाम {सार्वजनिक $ विशेषता; } $ A = नया वर्गनाम; $ A- & gt; विशेषता = "अन्ना"; $ Name = $ a- & gt; विशेषता; $ नाम गूंज; ? & Gt;

दोनों ही एक ही परिणाम प्रदान करते हैं मैं इसे प्राप्त नहीं कर पाया, किस मामले में मुझे एक्सेसर फ़ंक्शन का उपयोग करना चाहिए?

1) यह केवल आप नियंत्रण कैसे कर सकते हैं कि संपत्ति और किसके पास पहुंच हो सकती है। (एक्सेसर्स का इस्तेमाल करते समय यह संपत्ति निजी होनी चाहिए।)

2) आप कौन-कौन और कैसे इसे पहुंचा है, उसके आधार पर मूल्य में परिवर्तन हो सकता है

3) जब कोई संपत्ति होती है, तब आप किसी को सूचित कर सकते हैं उपयोग किया गया

कोई और भी बहुत कुछ ...


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