Monday 4 June 2018
comparison operator in php
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>comparison operator..</title>
</head>
<body>
<?php
$a=10;
$b=5;
$c=10;
if($a === $b)
{
echo " <p style='color:green'>success </p>" ;
}
else
{
echo "<p style='color:red'> failure </p>" ;
}
echo "<h1> >= Operator </h1>";
echo "a>=b =".($a>=$b);
echo "<h1> <= Operator </h1>";
echo "a<=b =".($a<=$b);
echo "<h1> == Operator </h1>";
echo "a==b =".($a==$b);
echo "<h1> != Operator </h1>";
echo "a!=b =".($a!=$b);
echo "<h1> === Operator </h1>";
echo "a===c =".($a===$c);
?>
</body>
</html>
Assignment Operator in php
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>assignment operator</title>
</head>
<body>
<?php
$x=4;
echo "<h1> = operator </h1> ";
$y=$x;
echo "value of y = ".$y;
echo "<br/>value of x = ".$x;
echo "<h1> += operator </h1> ";
$y+=$x; // y=y+x
echo "value of y = ".$y;
echo "<br/>value of x = ".$x;
echo "<h1> -= operator </h1> ";
$y-=$x; // y=y-x
echo "value of y = ".$y;
echo "<br/>value of x = ".$x;
echo "<h1> *= operator </h1> ";
$y*=$x; // y=y*x
echo "value of y = ".$y;
echo "<br/>value of x = ".$x;
echo "<h1> /= operator </h1> ";
$y/=$x; // y=y/x
echo "value of y = ".$y;
echo "<br/>value of x = ".$x;
?>
</body>
</html>
Airthmetic Operator in PHP
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Airthmatic operator</title>
</head>
<body>
<?php
$a=10;
$b=5;
echo "<h1>Addtion </h1>";
echo "a + b = ".($a+$b);
echo "<h1>Subtraction </h1>";
echo "a - b = ".($a-$b);
echo "<h1>Multiplication </h1>";
echo "a * b = ".($a*$b);
echo "<h1>Division </h1>";
echo "a / b = ".($a/$b);
echo "<h1>Modulus </h1>";
echo "a % b = ".($a%$b);
echo "<h1>Exponent </h1>";
//echo "a ^ b = ".($a**$b);
echo "a ^ b = ".pow($a,$b);
?>
</body>
</html>
variable scope in php
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>variable scope..</title>
</head>
<body>
<h1>variable scope </h1>
<?php
echo "<h2>Local variable </h2>";
function myfun1()
{
$x=15; //local .......
echo "value of inside the function x = ".$x;
}
myfun1();
//echo "value of outside the function x = ".$x;
echo "<h2>Global variable </h2>";
$y=10;
$z=20;
function myfun2()
{
//echo "value of y inside the function = ".$y;
}
myfun2();
echo "value of y outside the function = ".$y;
echo "<h2>Global keyword </h2>";
function myfun3()
{
global $y,$z;
$y=$y+$z;
echo "value of y inside the function = ".$y;
}
myfun3();
echo "<h2>static variable </h2>";
function myfun4()
{
static $a=0;
$a++;
echo "value of a inside the function = ".$a."<br/>";
}
myfun4();
myfun4();
myfun4();
?>
</body>
</html>
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