The is_a() function in PHP checks if the object is of this class or has this class as one of its parents. The function returns TRUE if the object is of this class or has this class as one of its parents, FALSE otherwise.
Syntax
is_a(object, class)
Parameters
object − The tested object
class − The name of class
Return
The is_a() function returns TRUE if the object is of this class or has this class as one of its parents, FALSE otherwise.
Example
The following is an example −
<?php
interface ClassOne {
public function Demo();
}
class ClassTwo implements ClassOne {
public function Demo () {
print "Demo";
}
}
$obj = new ClassTwo();
if(is_a($obj, 'ClassOne')) {
echo "Correct!";
} else {
echo "Incorrect!";
}
?>Output
Correct!