Two Dimentional array in PHP

<?php
    $a = array(array());
    $k = 0;
    for($i=0;$i<5;$i++){
        for($j=0;$j<3;$j++){
            $a[$i][$j] = $k++ % 10;
        }
    }
    
    for($i=0;$i<5;$i++){
        for($j=0;$j<3;$j++){
            echo $a[$i][$j];
        }
        
    }
?>

Array in PHP

<?php
    //decleartion of an array    
    $num = array(1,2,4,6,3);
    //printing the array elements
    foreach($num as $ar){
        echo $ar.'<br>';
    }
?>

Create a simple addition function in PHP

<?php
    //decleartion of a function 
    function addition($x,$y){ 
        $res = $x + $y;
        return $res;
    }
    $x = 4; //initializing the variable x
    $y = 7; //initializing the variable y;
    $res = addition($x,$y); //holding the result
    echo 'The addtion of x and y is: '.$res; //printing the addition result;
?>

Giving condition in PHP

<?php
    $x = 5;
    $y = 9;
    if($x > $y) echo 'x is greater than y';
    else echo 'x is less than y';
?>

While Loop in PHP

<?php
    $var = 'I love PHP'; //initialize the string variable var
    $i=0; // initialize i = 0
    while($i<5){
        echo $var.'<br>'; //printing 5 times the string var
        $i++; //incrementing the value of i
    }
?>

For Loop in PHP

<?php
    $var = 'I love PHP';
    for($i=0; $i<5; $i++){
        echo $var.'<br>'; //printing 5 times the string var; 
    }
?>

Finding the Length of a string in PHP

<?php
    $x = 'Mohammad Rakibul Haider'; //variable x holds my name
    echo strlen($x); //printing my name's length
?>