PHP if Operators

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PHP 11 Comparison Operators Equal - identical

To compare two values, we need to use a comparison operator. Here are the PHP comparison operators to use in if statements:

Operator Name Example Result
== Equal $x == $y True if $x is equal to $y
=== Identical $x === $y True if $x is equal to $y, and they are of the same type
> Greater than $x > $y True if $x is greater than $y
< Less than $x < $y True if $x is less than $y
>= Greater than or equal to $x >= $y True if $x is greater than or equal to $y
<= Less than or equal to $x <= $y True if $x is less than or equal to $y 
<h2>if_Comparison_Operators_Equal_identical</h2>
<h4>The == Equal Operator</h4>
<p>Compare two variables to check if they have the same value.</p>
<?php
$x = 100;  
$y = 100;
if ($x == $y) {
  echo "$x is equal to $y";
}
?> 
<h4>The === identical Operator</h4>
<p>Compare two variables to check if they are identical.</p>
<p>The identical operator (===) checks the value and the data type, unlike the equal operator (==) that checks only the value.</p>
<?php
$x = 100;  
$y = 100;
if ($x === $y) {
  echo "$x is identical to $y";
}
?>

Example 11

Result View Example

PHP 12 Comparison Operators Not equal - NOT identical

Operator Name Example Result
!= Not equal $x != $y True if $x is not equal to $y
<> Not equal $x <> $y True if $x is not equal to $y
!== Not identical $x !== $y True if $x is not equal to $y, or they are not of the same type 
<h2>if Comparison Operators Not equal - NOT identical</h2>

<h4>The != Not equal Operator</h4>
<p>Compare two variables and write a message if they don't have the same value.</p>
<?php
$x = 100;  
$y = 50;
if ($x != $y) {
  echo "$x is not equal to $y";
}
?>
<h4>The <> Not equal Operator</h1>
<p>Compare two variables and write a message if they don't have the same value.</p>
<?php
$x = 100;  
$y = 50;
if ($x <> $y) {
  echo "$x is not equal to $y";
}
?>
<h4>The !== NOT identical Operator</h4>
<p>Compare two variables and write a message if they are NOT identical.</p>
<p>The not identical operator (!==) checks the value and the data type, unlike the not equal operator (!=) that checks only the value.</p>
<?php
$x = 100;  
$y = 50;
if ($x !== $y) {
  echo "$x is not identical to $y";
}
?>

Example 12

Result View Example

PHP 13 Comparison Operators Greater than - Less than

Operator Name Example Result
> Greater than $x > $y True if $x is greater than $y
< Less than $x < $y True if $x is less than $y 
<h2>if Comparison_Operators Greater than - Less than </h2>

<h4>Greater than</h4>
<?php
    $x = 100;  
$y = 50;

if ($x > $y) {
  echo "$x is greater than $y";
}
?>  

<h4>Less than</h4>
<?php
    $x = 100;  
$y = 50;

if ($y < $x) {
  echo "$y is less than $x";
}

Example 13

Result View Example

Greater_than_or_equal_to_-_Less_than_or_equal_to

PHP 14 Comparison Operators Greater than or equal to - Less than or equal to

Operator Name Example Result
>= Greater than or equal to $x >= $y True if $x is greater than or equal to $y
<= Less than or equal to $x <= $y True if $x is less than or equal to $y 
<h4>Greater than or equal to</h4>
<?php
$x = 100;  
$y = 100;
if ($x >= $y) {
  echo "$x is greater than, or equal to $y";
}
?>  

<h4>Less than or equal to</h4>
<?php
$x = 100;  
$y = 100;
if ($y <= $x) {
  echo "$y is less than, or equal to $x";
}
?>

Example 14

Result View Example

PHP 21 Logical Operators

Operator Name Example Result
and And $x and $y True if both $x and $y are true
&& And $x && $y True if both $x and $y are true
or Or $x or $y True if either $x or $y is true
|| Or $x || $y True if either $x or $y is true
xor Xor $x xor $y True if either $x or $y is true, but not both
! Not !$x True if $x is not true 
 <h2>Logical Operators</h2>
        <p>To check more than one condition, we can use logical operators</p>
    
        <h4>and - && And</h4>
        <?php
        $x = 100;  
        $y = 50;
        
        if ($x == 100 and $y == 50) {
            echo "Hello world! and 1";
        }
        if ($x == 100 && $y == 50) {
            echo "Hello world! and 2";
        }
        ?>
        <h4>or - || Or</h4>
        <?php
        $x = 100;  
        $y = 50;
        
        if ($x == 100 or $y == 80) {
            echo "Hello world! or 1";
        }
        if ($x == 100 || $y == 80) {
            echo "Hello world! or 2";
        }
        ?>
        <h4>xor - Xor</h4>
        <?php
        $x = 100;
        $y = 50;
        if ($x == 100 xor $y == 80) {
            echo "Hello world! Xor";
        }
        ?>  
        <h4>! Not</h4>
        <?php
        $x = 100;  

        if (!($x == 90)) {
            echo "Hello world! Not";
        }
        ?>

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