gistfile1.txt

<?php

class SerializableClosure {

        private $args;
        private $code;

        function __construct($args,$code) {
                $this->args=$args;
                $this->code=$code;
        }

        public function __invoke(&$arg1=null,&$arg2=null,&$arg3=null,&$arg4=null,&$arg5=null,&$arg6=null,&$arg7=null,&$arg8=null,&$arg9=null) {
                $argstr=implode(",",$this->args);
                $paras=[];
                for ($k=1;$k<=count($this->args);$k++) $paras[]='$arg'.$k;
                $paras=implode(",",$paras);
                return eval('return (function ('.$argstr.') {'.$this->code.'})('.$paras.');');
        }

 
}
 
$closure=new SerializableClosure(['&$a','&$b'],'$a++;$b++;return $a+$b;');
$a=7;$b=5;
echo $closure($a,$b)."\n";
echo $a."/".$b."\n";

echo "====\n";

$serialize=serialize($closure);
$new_closure=unserialize($serialize);

$a=7;$b=5;
echo $new_closure($a,$b)."\n";