查看闭包函数的函数体

function my_closure_dump(Closure $c) {
    $str = ‘function (‘;
    $r = new \ReflectionFunction($c);
    $params = array();
    foreach($r->getParameters() as $p) {
        $s = ‘‘;
        if($p->isArray()) {
            $s .= ‘array ‘;
        } else if($p->getClass()) {
            $s .= $p->getClass()->name . ‘ ‘;
        }
        if($p->isPassedByReference()){
            $s .= ‘&‘;
        }
        $s .= ‘$‘ . $p->name;
        if($p->isOptional()) {
            $s .= ‘ = ‘ . var_export($p->getDefaultValue(), TRUE);
        }
        $params []= $s;
    }
    $str .= implode(‘, ‘, $params);
    $str .= ‘){‘ . PHP_EOL;
    $lines = file($r->getFileName());
    for($l = $r->getStartLine(); $l < $r->getEndLine(); $l++) {
        $str .= $lines[$l];
    }
    return $str;
}