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PHP Basic

PHP Intro

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PHP Install

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PHP Syntax

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PHP Comments

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PHP Variables

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PHP echo / print

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PHP Data Types

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PHP Strings

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PHP Numbers

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PHP Casting

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PHP Math

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PHP Constants

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PHP Magic Constants

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PHP Operators

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PHP if...Else...Elseif

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PHP switch

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PHP Loops

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PHP Functions

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PHP Arrays

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PHP Superglobals

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PHP RegEx

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PHP Form

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PHP Advanced

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PHP OOP

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MySQL Database

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PHP XML

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PHP Reference

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Text lesson

PHP if Operators

Comparison Operators

If statements typically include conditions that compare two values.

Example

Verify if $t

$t = 14;

if ($t == 14) {
  echo "Have a good day!";
}

To compare two values, we use comparison operators.

Here are the PHP comparison operators used in if statements:

Operator	Name	Result
==	Equal	Returns true if the values are identical
===	Identical	Returns true if the values and their data types are identical
!=	Not equal	Returns true if the values are different
<>	Not equal	Returns true if the values are unequal
!==	Not identical	Returns true if the values or data types differ
>	Greater than	Returns true if the first value is greater than the second value.
<	Less than	Returns true if the first value is less than the second value.
>=	Greater than or equal to	Returns true if the first value is greater than or equal to the second value.
<=	Less than or equal to	Returns true if the first value is less than or equal to the second value.

Logical Operators

To evaluate multiple conditions, we can use logical operators, such as the && operator:

Example

Check if $a is greater than $b and if $a is less than $c.

$a = 200;
$b = 33;
$c = 500;

if ($a > $b && $a < $c ) {
  echo "Both conditions are true";
}

Here are the PHP logical operators that can be used in if statements:

Operator	Name	Description
and	And	True if both conditions are true
&&	And	True if both conditions are true
or	Or	True if either condition is true
\|\|	Or	True if either condition is true
xor	Xor	True if either condition is true, but not both
!	Not	True if condition is not true

We can compare multiple conditions within a single if statement.

Example

Check if $a is one of the values: 2, 3, 4, 5, 6, or 7.

$a = 5;

if ($a == 2 || $a == 3 || $a == 4 || $a == 5 || $a == 6 || $a == 7) {
  echo "$a is a number between 2 and 7";
}