php call constant with using a variable - 


  // include.php परिभाषित करें ('OPTION_0', 'जनसंख्या का सार'); परिभाषित करें ('OPTION_1', 'पासपोर्ट अनुरोध / विस्तार'); परिभाषित करें ('OPTION_2', 'अनुरोध लॉगिंग रियायत'); //form.php & lt; चुनें नाम = "सॉर्ट" & gt; & Lt; विकल्प मान = "0" & ​​gt; & lt;? Php echo (O_0)? & Gt; & lt; / विकल्प & gt; & Lt; विकल्प मान = "1" & gt; & lt;? Php इको (O_1)? & Gt; & lt; / विकल्प & gt; & Lt; विकल्प मान = "2" & gt; & lt;? Php इको (O_2? & Gt; & lt; / विकल्प & gt; & lt; / select & gt; //show.php extract ($ _ POST); // चर $ सॉर्ट का मान है 1,2 या 3 प्रतिध्वनि ("यह आपकी पसंद है"); गूंज (OPTION_। $ सॉर्ट); // मैं निरंतर उदा का उपयोग करना चाहता हूं जैसे OPTION_2

मैं मान गूंजना चाहता हूं मिलान के निरंतर। तो जब मैं form.php में दूसरा मान चुनता है तो यह 1 के मान को सॉर्ट करता है, अब मैं स्थिरांक OPTION_1 का उपयोग करना चाहता हूं।

क्या कोई मेरी मदद कर सकता है?

< / Div>

बस फ़ंक्शन का उपयोग करें: 

  प्रतिध्वनि स्थिरांक ('OPTION_'। $ सॉर्ट); < / Code>

निरंतर () उपयोगी है अगर आपको निरंतर के मूल्य को पुनः प्राप्त करने की आवश्यकता है, लेकिन इसका नाम नहीं पता है। यह एक चर में संग्रहीत है या फ़ंक्शन द्वारा लौटा है। / P>


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