- is_callable: documentation ( source)
<?php
class x {
private $p = 'secret';
function RetVal(){
return $this->p;
}
}
class y {
private $q = 'queen';
function RetValue() {
return $this->q;
}
}
$f = function() {
return (new x)->RetVal();
};
echo $f(),"\n";
$g = function(){ return $this->p; };
$nu = $g->bindto((new x), "x");
echo $nu(),"\n";
echo $g->call((new x));
$g = function(){ return $this->q; };
echo "\n",$g->call((new y));
echo is_callable($g)? 'yes' : 'no';