PHP boolval() function
Description
PHP boolval function returns the boolean value of var.
Syntax
PHP boolval function has the following syntax.
boolean boolval ( mixed $var )Parameter
PHP boolval function has the following parameter.
- var - The scalar value being converted to a boolean.
Return
Returns the boolean value of var.
Example
What is the boolean value for converted from real value.
<?php//from w w w . jav a2 s .c o m
echo '0: '.(boolval(0) ? 'true' : 'false')."\n";
echo '4: '.(boolval(4) ? 'true' : 'false')."\n";
echo '0.0: '.(boolval(0.0) ? 'true' : 'false')."\n";
echo '4.2: '.(boolval(4.2) ? 'true' : 'false')."\n";
echo '"": '.(boolval("") ? 'true' : 'false')."\n";
echo '"string": '.(boolval("string") ? 'true' : 'false')."\n";
echo '"0": '.(boolval("0") ? 'true' : 'false')."\n";
echo '"1": '.(boolval("1") ? 'true' : 'false')."\n";
echo '[1, 2]: '.(boolval([1, 2]) ? 'true' : 'false')."\n";
echo '[]: '.(boolval([]) ? 'true' : 'false')."\n";
?>
The code above generates the following result.
