Posted on: 19.08.2020 Posted by: Alex D Comments: 0

Logical operators (AND, OR, NOT) in (IF, THEN) for JS and PHP

Logical operators AND, OR, NO for JS

Logical operators AND for JS – &&

if (true && true) document.write("It works!<br>");

Logical operators OR for JS – ||

if (true || false) document.write("It works!<br>");

Logical operators NO for JS- !

if (!false) document.write("It works!<br>");

Logical operators AND, OR, NO for PHP

Logical operators AND for PHP

IF (true AND true) echo "It works!";
IF (true && true) echo "It works!";

Logical operators OR for PHP

IF (true OR false) echo "It works!";
IF (true || false) echo "It works!";

Logical operators NO for PHP

IF ( !false ) echo "It works!";

Additional Information

Ternary operator if.

let result = condition ? value1 : value2;
let accessAllowed = (age > 18) ? true : false;
<?php
 
  $min = ($foo < $bar) ? $foo : $bar;
 
?>

Zero, empty quotes, NULL for the Java programming language Script and PHP are FALSE.

var a = 0; //false
var b = ""; //false
var c = null; //false
if ( !a ) document.write("It false!<br>");

Comparison Operators

$i == $y //equally
$i === $y //is equal and has the same data type
$i != $y //not equal
$i <> $y //not equal
$i !== $y //not equal or are they of different types
$i < $y //smaller
$i > $y //more
$i <= $y //less or equal
$i >= $y //more or equal
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