PHP Comparison Operators (original) (raw)

Summary: in this tutorial, you will learn how to use PHP comparison operators to compare two values.

Introduction to PHP comparison operators #

A comparison operator allows you to compare two values and returns true if the comparison is truthful and false otherwise.

The following table shows the comparison operators in PHP:

Equal To Operator (==) #

The equal to operator returns true if both values are equal; otherwise, it returns false.

The following example returns true because 10 is equal to 10:

`<?php

$x = 10; $y = 10;

var_dump($x == $y); // bool(true)`Code language: PHP (php)

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The following example returns false because 10 is not equal 20:

` <?php

$x = 20; $y = 10; var_dump($x == $y); // bool(false)`Code language: PHP (php)

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The following example compares the number 20 with a string '20', it also returns true.

`<?php

$x = '20'; $y = 20; var_dump($x == $y); // bool(true)`Code language: PHP (php)

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If you want to compare two values with the consideration of type, you can use the identical operator (===).

Not equal to operator (!=, <>) #

The not equal to (!=, <>) operator returns true if the lefthand value is not equal to the righthand value; otherwise, it returns false. For example:

`<?php

$x = 20; $y = 10;

var_dump($x != $y); // bool(true)`Code language: PHP (php)

Try it

Output:

bool(true)Code language: JavaScript (javascript)

Identical operator (===) #

The identical operator returns true if both values are equal and have the same type; otherwise returns false.

The following example uses the identical operator to compare a string and a number. It returns false because these values have different types:

`<?php

$x = '20'; $y = 20; var_dump($x === $y); // bool(false)`Code language: PHP (php)

Try it

Not identical operator (!==) #

The not identical operator (!==) returns true if the values are not equal or they do not have the same type; otherwise, it returns false. For example:

`<?php

$x = 20; $y = 10;

var_dump($x != $y); // bool(true)

$x = 20; $y = '20'; var_dump($x != $y); // bool(false)`Code language: PHP (php)

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Greater than (>) #

The greater-than operator returns true if the lefthand value is greater than the righthand value; otherwise, it returns false:

`<?php

$x = 10; $y = 20;

var_dump($x > $y); // bool(false) var_dump($y > $x); // bool(true)`Code language: PHP (php)

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Greater than or equal to (>=) #

The greater than or equal to operator returns true if the lefthand value is greater than or equal to the righthand value; otherwise, it returns false. For example:

`<?php

$x = 20; $y = 20;

var_dump($x >= $y); // bool(true) var_dump($y >= $x); // bool(true)`Code language: PHP (php)

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Less than (<) #

The less-than operator returns true if the lefthand value is less than the righthand value; otherwise, it returns false. For example:

`<?php

$x = 20; $y = 10;

var_dump($x < $y); // bool(false) var_dump($y < $x); // bool(true)`Code language: PHP (php)

Try it

Less than or equal to (<=) #

If the lefthand value is less than or equal to the righthand value, the less than or equal to operator returns true; otherwise, it returns false. For example:

`<?php

$x = 20; $y = 20;

var_dump($x <= $y); // bool(true) var_dump($y <= $x); // bool(true)`Code language: PHP (php)

Try it

In this tutorial, you have learned how to use the PHP comparison operators to compare two values of the same or different types.

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