php - data not being updated -


data not being updated when trying update, showing not update data always, have session carrying reg registration table , want update reg in slam table in reg present. here reg present in both tables.

<?php session_start();  if($_server["request_method"] == "post") { $con=mysqli_connect("xyz","aaa","aaa","aaa"); if (mysqli_connect_errno($con)) {    echo "failed connect mysql: " . mysqli_connect_error(); }  $reg =  $_request["reg"]; $t1 =  $_request["t"]; $t2 = $_request['t2']; $t3 = $_request['t3']; $t4 = $_request['t4']; $t5 = $_request['t5']; $t6 = $_request['t6']; $t7 = $_request['t7']; $t8 = $_request['t8']; $t9 = $_request['t9']; $t10 = $_request['t10']; $t11 = $_request['t11'];  $t13 = $_request['t13']; $t14 = $_request['t14']; $t15 = $_request['t15']; $t16 = $_request['t16']; $t17 = $_request['t17']; $t18 = $_request['t18']; $t19 = $_request['t19']; $t20 = $_request['t20']; $t21 = $_request['t21']; $t22 = $_request['t22']; $t23 = $_request['t23']; $t24 = $_request['t24']; $t25 = $_request['t25']; $t26 = $_request['t26']; $t27 = $_request['t27']; $t28 = $_request['t28']; $t29 = $_request['t29']; $t30 = $_request['t30']; $t31 = $_request['t31']; $t32 = $_request['t32']; $t33 = $_request['t33']; $t34 = $_request['t34']; $t35 = $_request['t35']; $t36 = $_request['t36']; $t37 = $_request['t37']; $t38 = $_request['t38'];  $sql="update slambook set iam = '$t1' ,pals = '$t2',birthday = '$t3' ,mobile = '$t4' ,zodiac ='$t5' ,address = '$t6',email ='$t7',site = '$t8',id = '$t9' ,hang = '$t10',food = '$t11',colour = '$t13',outfit = '$t14',novel = '$t15',singer = '$t16',song = '$t17',movie = '$t18',actor = '$t19',aim = '$t20',memor = '$t21',you = '$t22',date = '$t23',city = '$t24',frienship = '$t25',nuts = '$t26',besties = '$t27',destiny = '$t28',y = '$t29',moment = '$t30',achieve = '$t31',dream = '$t32',experience = '$t33',imagination = '$t34',regrets = '$t35',stupid = '$t36',belief = '$37',about = '$38' reg=$reg";   $retval = mysqli_query($con,$sql); if(!$retval ) {   die('could not update data: ' . mysql_error()); }   echo "updated data successfully\n"; mysqli_close($con); } else { ?>


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