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PHP Code for retrieve and write data from a table

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PHP Code for retrieve and write data from a table

by Shanmugalingam » Mon Jun 08, 2015 8:11 am

Hi,
I want some php codes to check, the index No in the database, if the index No available again check the registered column to check whether he or she already registered, If not, write to that column "yes" and show his/her details, If that column says yes show a message "You are already registered"
I already created a database with necessary fields. and their is field called status. in that field the program automatically should fill "yes" or a massage like " You are already registered".
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Shanmugalingam

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Re: PHP Code for retrieve and write data from a table

by XainPro » Tue Jun 09, 2015 1:21 pm

By all of your detail i think you are trying to build a login system
check login system simple tutrial here


http://www.wikihow.com/Create-a-Secure- ... -and-MySQL
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XainPro

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Re: PHP Code for retrieve and write data from a table

by softinx » Fri Sep 25, 2015 11:42 am

Thanks for asking the nice question. I also faced the same problem because at that time I was preparing for my job interview so I go the solution
Code: Select all
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "SELECT id, firstname, lastname FROM MyGuests";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // output data of each row
    while($row = $result->fetch_assoc()) {
        echo "id: " . $row["id"]. " - Name: " . $row["firstname"]. " " . $row["lastname"]. "<br>";
    }
} else {
    echo "0 results";
}
$conn->close();
?>
from http://www.w3schools.com/php/php_mysql_select.asp
For best interview questions of php with answer I got the help and crack my interview..Hope it will help you also https://intellipaat.com/interview-question/php-interview-questions/
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softinx

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Re: PHP Code for retrieve and write data from a table

by tekclasses » Tue Dec 27, 2016 11:43 am

Code: Select all
<?php
$connect=mysql_connect('localhost', 'root', 'password');

mysql_select_db("name");
//here u select the data you want to retrieve from the db

$query="select * from tablename";

$result= mysql_query($query);

//here you check to see if any data has been found and you define the width of the table

If($result){

echo "<table width ='340' align='left'>
      <tr color ='#5D9951>";
$i=0;

    If(mysql_num_rows($result)>0)
    {
         //here you fetch the data from the database and print it in the respective columns   
        while($i<mysql_num_fields($result))
        {   
             echo "<th>".mysql_field_name($result, $i)."</th>";
             $i++;
        }
        echo "</tr>";

        $color=1;

        while($rows=mysql_fetch_array($result, MYSQL_ASSOC))
        {   
            If ($color==1){
                echo "<tr color='#'#cccccc'>";

                foreach ($rows as $data){
                    echo "<td align='center'>".$data. "</td>";
                }

                $color=2;
            }
            $color=1;
        }
     } else {
        echo"no results found";
        echo "</table>";
    } else {
        echo "error running query:".MYSQL_error();
}
?>


For More Info https://goo.gl/Qgg02u
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tekclasses

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