Boolean
The boolean data type (bool) is used to represent logical values. A boolean variable can only have two possible values: true or false. Booleans are fundamental for decision-making and conditional operations within PHP programs.
main.php
1234<?php $isActive = true; $isLogged = false; ?>
Outputting Boolean Values
You can output boolean values (true or false) using the echo function. When you use echo with true, PHP automatically outputs "1", as true converts to this string:
main.php
1234<?php $isLoggedIn = true; echo $isLoggedIn; // Outputs "1" ?>
When you use echo with false, nothing is output, as false converts to an empty string:
main.php
1234<?php $isLoggedIn = false; echo $isLoggedIn; // Does not output anything ?>
This approach allows for convenient output of boolean values without manually converting them to strings.
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Can you show an example of using echo with a boolean value in PHP?
Why does true output "1" and false output nothing in PHP?
Are there other ways to display boolean values as strings in PHP?
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Pyyhkäise näyttääksesi valikon
The boolean data type (bool) is used to represent logical values. A boolean variable can only have two possible values: true or false. Booleans are fundamental for decision-making and conditional operations within PHP programs.
main.php
1234<?php $isActive = true; $isLogged = false; ?>
Outputting Boolean Values
You can output boolean values (true or false) using the echo function. When you use echo with true, PHP automatically outputs "1", as true converts to this string:
main.php
1234<?php $isLoggedIn = true; echo $isLoggedIn; // Outputs "1" ?>
When you use echo with false, nothing is output, as false converts to an empty string:
main.php
1234<?php $isLoggedIn = false; echo $isLoggedIn; // Does not output anything ?>
This approach allows for convenient output of boolean values without manually converting them to strings.
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