php-form/if_else.php at main · Shailesh847/php-form · GitHub

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<?php
/* $var1=17;
 if($var1>18){
     echo "eligible";
 }
 else{
    echo "not eligible";
 }*/

// $var1=7;
// $var2=7;
/*
echo $var1+=$var2; //10
echo "<br>";
echo $var1-=$var2; //7
echo "<br>";
echo $var1*=$var2; //21
echo "<br>";
echo $var1/=$var2;  //7
echo "<br>";
echo $var1%=$var2; //1
echo "<br>";
echo $var1**=$var2;  //1
echo "<br>"; */
/*
echo $var1++; //7
echo "<br>";
echo $var1--; //8
echo "<br>";
echo ++$var1; //8
echo "<br>";
echo --$var1; //7 */
//echo "<script>alert('shailesh');</script>";
// var_dump($var1==$var2); //false
// echo "<br>";
// var_dump($var1===$var2); //false it check the data type
// echo "<br>";
// var_dump($var1!=$var2); //false
// echo "<br>";
// var_dump($var1<>$var2);//not equal to is also write like this //false (!=  -->  <>)
// echo "<br>";
// var_dump($var1!==$var2); //false it check the data type and value
//echo "<br>";

// $age=27;
// echo $sch=($age>18)?'eligible' :'not eligible';
// echo "<br>";

// $str="this is first <br>";
// $str.="this is second<br>";
// $str.="this is third<br>";
// echo $str;

// $marks=60;
// if($marks>=80 && $marks<100)  //and = &&
// {
//     echo "grade A";
// }
// elseif($marks>=60 && $marks<80)
// {
//     echo "grade B";
// }
// elseif($marks>=40 && $marks<60)
// {
//     echo "grade C";
// }
// elseif($marks>=20 && $marks<40)
// {
//     echo "grade D";
// }
// else{
//     echo "fail";
// }
$day=1;
switch($day)
{
    case 1:
        echo "sunday";
        break;
    case 2:
        echo "monday";
        break;
    case 3:
        echo "tuesday";
        break;
    default:
       echo "invalid";
       break;

}
/*$_GET-when form method is get
$_POST -when form method is post
both are predefined variable in php
*/


?>