Syntax
bool is_bool ( mixed var )
Popis
Príkaz jazyka PHP
Finds whether the given variable is a boolean.
Returns TRUE if var is a boolean, FALSE otherwise.
Príklad
<?php
$a =
false;
$b = 0;
// Since $a is a boolean, this is true
if (is_bool($a)) {
echo "Yes, this is a boolean";
}
// Since $b is not a boolean, this is not true
if (is_bool($b)) {
echo "Yes, this is a boolean";
}
?>
Pozri aj
is_float, is_int, is_string, is_object, is_array