PHP boolval() Function

Example

Return the boolean value of different variables:

<?php
echo "0: " .(boolval(0) ? 'true' : 'false') . " ";
echo "4: " .(boolval(42) ? 'true' : 'false') . " ";
echo '"": ' .(boolval("") ? 'true' : 'false') . " ";
echo '"Hello": ' .(boolval("Hello") ? 'true' : 'false') . " ";
echo '"0": ' .(boolval("0") ? 'true' : 'false') . " ";
echo "[3, 5]: " .(boolval([3, 5]) ? 'true' : 'false') . " ";
echo "[]: " .(boolval([]) ? 'true' : 'false') . " ";
?>

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Definition and Usage

The boolval() function returns the boolean value of a variable.

Syntax

boolval(variable);

Parameter Values

Parameter	Description
variable	Required. Specifies the variable to check. Must be a scalar type

Technical Details

Return Value:	The boolean value of the variable
Return Type:	Boolean
PHP Version:	5.5+

❮ PHP Variable Handling Reference