php - how to store the value from html dropdwon list to use in the same page -

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मेरे पास यह कोड है - 

  & lt; form method = "post" action = " generate.php "& gt; & lt; नाम चुनें = "परीक्षा" आईडी = "टेस्ट" & gt; & Lt;? Php $ i = 0; foreach ($ testName $ नाम के रूप में) {? & gt; & Lt; विकल्प मान = "& lt;? Php echo $ name;? & Gt;" & gt; & lt;? Php गूंज $ टेस्टनाम [$ i];? & Gt; & lt; / विकल्प & gt; & Lt;? Php $ i ++; }? & Gt; & Lt; / चयन & gt; & Lt; इनपुट प्रकार = "सबमिट करें" name = "submit" value = "उत्पन्न" & gt; & Lt; / प्रपत्र & gt;   
 मैं उपयोगकर्ता द्वारा चुने गए मान को उसी तरीके से कैसे संग्रहीत कर सकता हूँ जिसे मैं उसी php पृष्ठ में उपयोग कर सकता हूं?   
 
 
 = "छिपा" & gt;   
 और चयन तत्व पर एक  onchange  ईवेंट को कॉल करें।  
  & lt; नाम चुनें = "test" id = "test" onchange = "परीक्षण ()" & gt;   
 समान जेएस फ़ंक्शन लिखें,  
  & lt; स्क्रिप्ट & gt; फ़ंक्शन टेस्ट () {var चयनितवॉल = $ ("# टेस्ट")। Val (); // चयनित मूल्य $ मिलता है ("# छिपा")। वेल (चयनित); // छिपा हुआ फ़ील्ड का मान सेट करें} & lt; / script & gt;

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