View the function body of the closure function Function image Inverse function Logarithmic function

When debugging, if you encounter a closure, you would like to know which closure it is. However, IDE generally does not display the function body of the closure. So I copied a function from the Internet to display the content of the closure function

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

The above introduces the function body of viewing closure function, including functions and viewing aspects. I hope it will be helpful to friends who are interested in PHP tutorials.