Try this one, it is working fine. You were missing some required headers.
This url doesn't give any result without this header User-Agent
<?php
$url='https://www.nseindia.com/live_market/dynaContent/live_watch/get_quote/ajaxGetQuoteJSON.jsp?symbol=tcs';
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_HTTPHEADER,array(
"Accept-Encoding:UTF-8",
"Content-type: application/json",
"User-Agent:Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.82 Safari/537.36"));
$result=curl_exec($ch);
curl_close($ch);
$result_array =json_decode($result, true);
print_r($result_array);
Output:
Array
(
[futLink] => /live_market/dynaContent/live_watch/get_quote/GetQuoteFO.jsp?underlying=TCS&instrument=FUTSTK&expiry=27APR2017&type=-&strike=-
[otherSeries] => Array
(
[0] => EQ
)
[lastUpdateTime] => 12-APR-2017 16:00:00
[tradedDate] => 12APR2017
[data] => Array
(
[0] => Array
(
[extremeLossMargin] => 5.00
[cm_ffm] => 1,27,324.62
[bcStartDate] => -
[change] => -27.30
[buyQuantity3] => -
[sellPrice1] => 2,393.25
[buyQuantity4] => -
[sellPrice2] => -
[priceBand] => No Band
[buyQuantity1] => -
[deliveryQuantity] => 3,31,274
[buyQuantity2] => -
[sellPrice5] => -
[quantityTraded] => 5,25,269
[buyQuantity5] => -
[sellPrice3] => -
[sellPrice4] => -
[open] => 2,422.50
[low52] => 2,051.90
[securityVar] => 3.85
[marketType] => N
[pricebandupper] => 2,661.20
[totalTradedValue] => 12,624.32
[faceValue] => 1.00
[ndStartDate] => -
[previousClose] => 2,419.30
[symbol] => TCS
[varMargin] => 7.50
[lastPrice] => 2,392.00
[pChange] => -1.13
[adhocMargin] => -
[companyName] => Tata Consultancy Services Limited
[averagePrice] => 2,403.40
[secDate] => 12APR2017
[series] => EQ
[isinCode] => INE467B01029
[indexVar] => -
[pricebandlower] => 2,177.40
[totalBuyQuantity] => -
[high52] => 2,744.80
[purpose] => INTERIM DIVIDEND RS 6.50 PER SHARE
[cm_adj_low_dt] => 15-NOV-16
[closePrice] => 2,393.25
[isExDateFlag] =>
[recordDate] => 24-JAN-17
[cm_adj_high_dt] => 12-AUG-16
[totalSellQuantity] => 565
[dayHigh] => 2,428.00
[exDate] => 23-JAN-17
[sellQuantity5] => -
[bcEndDate] => -
[css_status_desc] => Listed
[ndEndDate] => -
[sellQuantity2] => -
[sellQuantity1] => 565
[buyPrice1] => -
[sellQuantity4] => -
[buyPrice2] => -
[sellQuantity3] => -
[applicableMargin] => 12.50
[buyPrice4] => -
[buyPrice3] => -
[buyPrice5] => -
[dayLow] => 2,383.00
[deliveryToTradedQuantity] => 63.07
[totalTradedVolume] => 5,25,269
)
)
[optLink] => /marketinfo/sym_map/symbolMapping.jsp?symbol=TCS&instrument=-&date=-&segmentLink=17&symbolCount=2
)