SQL Prepared Statements ( Very Important Concept )

 

<?php

//database connection

$connect = mysqli_connect("localhost","root","","user");

//prepare statement

$sql = $connect->prepare("insert into datas(name)values(?)");   //?-placeholder

//binding parameters

$sql->bind_param("s",$name);    //s - string, i - integer, d - double

//setting value

$name = "phpecho";  //$_POST['name'];

$sql->execute();   //execute the query

echo "Data inserted successfully.";

?>

Video Link (Sql Prepared Statement)

Promises in JavaScript

 Create Promise

let myPromise = new Promise(function(resolve, reject) {

Condition

let success = true;

If Condition

if (success) {

    resolve("Task Completed");

}

Else Condition

else {

    reject("Task Failed");

}

Handle Success

.then(function(result) {

    console.log(result);

})

Handle Error

.catch(function(error) {

    console.log(error);

});

Full Code :

let myPromise = new Promise(function(resolve, reject) {

    let success = true;

    if (success) {

        resolve("Task Completed");

    } else {

        reject("Task Failed");

    }

});

myPromise

.then(function(result) {

    console.log(result);

})

.catch(function(error) {

    console.log(error);

});

⚡ Flow Summary

Promise created
     ↓
Check condition (success)
     ↓
If true → resolve() → then()
If false → reject() → catch()

🎯 Real-life Example

You ordered food 🍔


If delivered → 
If delivered → resolve("Food arrived")


If not → 
If not → reject("Delivery failed")

MYSQL vs MYSQLI vs PDO

 
<?php

//mysql

//$conn = mysql_connect("localhost","root","");

//$db = mysql_select_db("Your_database_name", $conn);

//mysqli

//$conn = mysqli_connect("localhost","root","","Your_database_name");

//PDO

$conn = new PDO("mysql:host=localhost;dbname=Your_database_name","root","");  

if(!$conn){

echo "Not connected";

}

else{

echo "Connected PDO";

}

?>

Video Link

HTML & CSS Coding The Web s Story

 

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Define constant in Php

If you're working with PHP, one of the most important concepts you should know is constants — and that’s where define() comes in 🚀

🔹 What is define()?
define() is a built-in PHP function used to create a constant value that cannot be changed during script execution.

🔹 Why use constants?
Constants are perfect for storing values that should remain fixed, like:

• Website name
• Database credentials
• API keys
• Company details

🔹 Basic Syntax:

define("CONSTANT_NAME", "value");


Check the video

Code 

<?php

define("channel","youtube@phpecho");

define("contact","+91-2221221221");

?>

<?php echo channel; ?>

<?php echo contact; ?>

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Start Your Tech Journey Today!

 

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