PHP Operators

PHP-Operators.php

<?php

/*
	Arthimetic Operators

	Addition [ + ]

	Subtraction [ - ]

	Maltuiplication [ * ]

	Division [ / ]

	Modulus [ % ] The rest of Division (Baqi alqesma()

	Exponentiation [ ** ] Exponent (in Arabic Al'os)  needs php 5.6 or higher...... Ex: 2 ** 2 means in Arabic 2 Os 2 and the result will be 4 and 3 ** 3 means in Arabic 3 Os 3 and the result will be 27.


*/
/*	$var1 = 1000;
	$var2 = 2000;

	echo $var1 + $var2; //3000
*/
	echo "Arthimetic Operators" . "<br>";
	echo "<hr />";

	$var1 = 4500;
	$var2 = 1000;
	$var3 = $var1 - $var2;
	$var4 = $var2 - $var1;
	$var5 = 4;
	$var6 = 5;
	$var7 = 90;
	$var8 = 3;
	$var9 = 120;
	$var10 = 7;
	echo $var1 + $var2 . "<br/>"; //5500
	echo $var3 . "<br/>"; //3500
	echo $var4 . "<br/>"; // -3500
	echo $var5 * $var6 . "<br/>"; //20
	echo $var7 / $var8 . "<br/>"; //30
	echo $var9 % $var10 . "<br/>"; //

	// phpinfo(); //To show all info about the current PHP version

	/*
		Assignment Operators

		(=) $var1 = 5; (=) is the Assignment operator
		(+=) is Assignment Operator also.
		(.=) is Assignment Operator also.
		(-=) is Assignment Operator also.
		(*=) is Assignment Operator also.
		(/=) is Assignment Operator also.

	*/

	echo "<hr />";
	echo "Assignment Operators" . "<br>";
	echo "<hr />";

	$var11 = 100;
	$var11 += 200; // Result will be 300 .... This Ex is similar to $var11 = $var11 + 200;

	$myName = "Ahmed"; // This EX is similar to $myName = "Ahmed" . " Sheta" . " VIROX"
	$myName .= " Sheta";
	$myName .= " VIROX";

	$var12 = 200;
	$var13 = 300;
	$var12 += $var13;

	$var14 = 500;
	$var14 -= 300;

	$var15 = 4;
	$var15 *= 3;
	$var15 .= " is the result.";

	$var16 = 20;
	$var16 /= 4;

	echo $var11 . "<br>";
	echo $myName . "<br>";
	echo $myNamee = "Ahmed" . " Sheta" . " VIROX" . "<br>";
	echo $var12 . "<br>";
	echo $var14 . "<br>";
	echo $var15 . "<br>";
	echo $var16 . "<br>";

	/*

		Comparison Operators

		[ == ] Equals ----> it will use to compare. It will check if the values are the same even if its data type are different. >>> $var1 = 100; $var2 = "100" so $var1 == $var2 becuase its values are the same.
		[ != ] NOT Equals ----> it's Reverse of the [ == ] Equal Operator.
		[ <> ] NOT Equals ----> the Same uses for  [ != ] it's Reverse of the [ == ] Equal Operator.
		[ === ] Identical ----> it will use to make sure the variables have the same Data Type and the Same Value.
		[ !== ] NOT Identical ----> it's Reverse of the [ === ] Identical Operator.
		[ < ] Less Than.
		[ <= ] Less Than or Equal.
		[ > ] Greather Than.
		[ >= ] Greater Than or Equal.
		
	*/
		echo "<hr />";
		echo "Comparison Operator";
		echo "<hr />";

		$a = 100;
		$b = 500;

		echo gettype($a) . "<br>" . gettype($b) . "<br>";
//		echo $a == $b; // No Result because $a doesn't equal to $b, so it will be useful with if statement or loops.

		if ($a == $b) { // if we uses (=) one equal only, it will mean Assignment, so $a = $b will return True every time.
			echo "True" . "<br>";
		} else {
			echo "False" . "<br>";
		}

		if ($a === $b) { //a & b have the same data type (integer), but have different value, so a & b are NOT identical
			echo "a & b have the Same Value, and Data type" . "<br>";
		} else {
			echo "a & b have NOT the Same Value, and Data type" . "<br>";
		}

		// another EX about [ === ] Identical Operator


		$c = 500;
		$d = "500";

		echo "The Data Type for c is " . gettype($c) . "<br>" . "The Data Type for d is " . gettype($d) . "<br>";

		if ($c === $d) {
			echo "c & d are Identical and have The same Data Type and the Same Value" . "<br>";
		} else {
			echo "c & d are NOT Identical, because the Data Type and the Value for both are NOT the same, or at least one of them" . "<br>";
		}

// Ex about [ != ] NOT Equals

		$e = 100;
		$f = 300;

		if ($e != $f) {
			echo "Yes, " . $e . " is NOT Equal to " . $f . "<br>";
		} else {
			echo "No, " . $e . " is Equal to " . $f . "<br>";
		}

// Ex about [ !== ] NOT Identical

		$g = 123;
		$h = 147;

		echo "The Data Type for g is " . gettype($c) . "<br>" . "The Data Type for h is " . gettype($d) . "<br>";
		echo "Now we know the Data Type for \$g & \$h" . "<br>"; // Use (\) before Var Name to print it's name Not its Value.
		if ($g !== $h) {
			echo "Yes, " . $g . " is NOT Identical with " . $h . "<br>"; 
		} else {
			echo "No, " . $g . " is Identical with " . $h . "<br>"; 
		}


// Ex about [ <> ] NOT Equals

		$hi = 150;
		$bye = 750;

		if ($hi <> $bye) {
			echo "True " . $hi . " is NOT Equal to " . $bye . "<br>";
		} else {
			echo "False " . $hi . " is Equal to " . $bye . "<br>";
		}

// Ex about [ < ] Less Than Operator

		$x = 550;
		$y = 750;

		if ($x < $y) {
			echo "Yes " . $x . " is Less Than " . $y . "<br>";
		} else {
			echo "No " . $x . " is Greater Than " . $y . "<br>";
		}

// Ex about [ <= ] Less Than or Equal Operator

		$z = 513;
		$k = 512;

		if ($z <= $k) {
			echo "Ooooh Yeah " . $z . " is Less Than or Equal to " . $k . "<br>";
		} else {
			echo "Ooops! No,  " . $z . " is Greater Than " . $k . " and NOT Equal to it also." ."<br>";
		}

// Ex about [ <= ] Less Than or Equal Operator

		$t = 2048;
		$r = 1024;

		if ($t > $r) {
			echo "Yes " . $t . " is Greater Than " . $r . "<br>";
		} else {
			echo "No " . $t . " is Less Than " . $r . "<br>";
		}

// Ex about [ > ] Less Than or Equal Operator

		$win = 2020;
		$lose = 2019;

		if ($win > $lose) {
			echo "Yep, " . $win . " is Greater Than " . $lose . "<br>";
		} else {
			echo "Nope, " . $win . " is Less Than " . $lose . "<br>";
		}


// Ex about [ >= ] Less Than or Equal Operator

		$q = 2.25;
		$w = 1.5;

		echo "The Data Type for \$q is " . gettype($q) . ", and the Data Type for \$w is " . gettype($w) . "<br>";

		if ($q >= $w) {
			echo "WoW! Yes, " . $q . " is Greater than or Equal to " . $w . "<br>";
		} else {
			echo "OooOoOps! No, " . $q . " is NOT Greater than or Equal to " . $w . "<br>";
		}


/*

	Increment / Decrement Operators (Used with Num and String Only)

	[ ++$var ] Pre Increment, It will increase the Value by 1 first, then Print it.
	[ $var++ ] Post Increment, It will type the Value first, then increase it by 1 and Print it. 
	[ --$var ] Pre Decrement, It will decrease the Value by 1 first, then Print it.
	[ $var-- ] Post Decrement, It will type the Value first, then decrease it by 1 and Print it. 

*/
		echo "<hr />";
		echo "Increment / Decrement Operator";
		echo "<hr />";

	$incvar = 10;

	echo ++$incvar . "<br>"; // 11 [ ++$var ] Pre Increment
	echo ++$incvar . "<br>"; // 12 [ ++$var ] Pre Increment
	echo ++$incvar . "<br>"; // 13 [ ++$var ] Pre Increment
	echo ++$incvar . "<br>"; // 14 [ ++$var ] Pre Increment

	$incvar2 = 20;

	echo ".................................." . "<br>";
	echo $incvar2++ . "<br>"; // 20 [ $var++ ] Post Increment
	echo $incvar2++ . "<br>"; // 21 [ $var++ ] Post Increment
	echo $incvar2++ . "<br>"; // 22 [ $var++ ] Post Increment
	echo $incvar2++ . "<br>"; // 23 [ $var++ ] Post Increment
	echo ".................................." . "<br>";

	$decvar = 30;

	echo --$decvar . "<br>"; // 29
	echo --$decvar . "<br>"; // 28
	echo --$decvar . "<br>"; // 27
	echo --$decvar . "<br>"; // 26
	echo --$decvar . "<br>"; // 25

	$decvar2 = 50;

	echo ".................................." . "<br>";
	echo $decvar2-- . "<br>"; // 50
	echo $decvar2-- . "<br>"; // 49
	echo $decvar2-- . "<br>"; // 48
	echo $decvar2-- . "<br>"; // 47
	echo $decvar2-- . "<br>"; // 46

/*

	Logica Operators

	[ and ] All conditions must be TRUE.
	[ && ] We must use it instead of (and). All Conditions must be TRUE.
	[ xor ] One condition only must be TRUE and the others must be FALSE.
	[ or ] At least one condition must be TRUE.
	[ || ] Means (or) and we must use it instead of (or). At least one condition must be TRUE.
	[ ! ] Means not. EX: if !(var=10)


*/
		echo "<hr />";
		echo "Logical Operators";
		echo "<hr />";

		$firname = "Ahmed";
		$midname = "Sheta";
		$lasname = "VIROX";

		if ($firname == "Ahmed" && $midname == "Sheta" && $lasname == "VIROX") {

			echo $firname . " " . $midname . " " . $lasname . "<br>";
		}

		$game1 = "Unreal";
		$game2 = "Stronghold";

		if ($game1 == "Red Alert" xor $game2 == "Stronghold") {

			echo "Best PC Games for Ahmed Sheta" . "<br>";
		} else {
			echo "Ooooh, I need my best games!!!" . "<br>";
		}

		$game3 = "Red Alert";
		$game4 = "Medal of Honor";
		$game5 = "Angry Birds";

		if ($game3 == "Red Alert" || $game4 =="Pocket Tanks" || $game5 == "Angry Birds") {

			echo "Yes, Ahmed Sheta Love Those Games" . "<br>";
		}

		$game6 = "Call of Duty";
		$game7 = "Mario";
		$game8 = "Lego Racer";

		if (!($game7 === $game8)) {

			echo "Where is Mafia Game ??" . "<br>";
		} else {
			echo "Yes, I Love Mafia Game" . "<br>";
		}

/*

	Error Operator

	[ @ ] This will ignore the Error message and will not display it, and also we can add a Custom Erro message.


*/

//           $myfile = fopen("ahmed.txt" , "r"); // file is exist
//           $myfile2 = @fopen("virox.txt", "r") or die("404! File Not Found. Help yourself and try again.");


/*

	String Operators

	[ . ] Concatenate 2 or more strings. For String Only
	[ .= ]


*/

$conct = "Conct My friend";
$conct .= " - Good Morning";

echo $conct;  //same as echo "Conct My friend" . " - Good Morning";