PHP Conditional Statements

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fdgdfgdg PHP Conditional Statements

Conditional statements are use to create the step by step program flow and control the program execution.

In PHP conditional statements are:

  • if statement – executes some code only if a specified condition is true
  • if…else statement – executes some code if a condition is true and another code if the condition is false
  • if…elseif….else statement – specifies a new condition to test, if the condition is false
  • switch statement – selects one of many blocks of code to be executed

 PHP – The if Statement

The if statement is use to display  some code only if a condition is true.

Syntax

if (condition) {
code will display if condition is true.

}

“Have a good day!” if the current time (HOUR) is less than 20:

<?php
$t = date(“H”);

if ($t < “20”) {
echo “Have a good day!”;
}
?>

 PHP – The if…else Statement

Use the if….else statement to execute some code if a condition is true and another code if the condition is false.

Syntax

if (condition) {
code will display if condition return true;
} else {
  code will display if condition return false;
}

The example below will output “Have a good day!” if the current time is less than 20, and “Have a good night!” otherwise:

<?php
$t = date(“H”);

if ($t < “20”) {
echo “Have a good day!”;
} else {
echo “Have a good night!”;
}
?>

 PHP – The if…elseif….else Statement

Use the if….elseif…else statement to specify a new condition to test, if the first condition is false.

Syntax

if (condition) {
code will executed if condition is true;
} elseif (condition) {
  code will executed if condition is true;
} else {
code will display if condition is false;
}

The example below will output “Have a good morning!” if the current time is less than 10, and “Have a good day!” if the current time is less than 20. Otherwise it will output “Have a good night!”:

<?php
$t = date(“H”);

if ($t < “10”) {
echo “Have a good morning!”;
} elseif ($t < “20”) {
echo “Have a good day!”;
} else {
echo “Have a good night!”;
}
?>

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