failed to execute cmd: " dot -Tpng". stderr: `sh: dot: command not found ' xhprof为facebook的php性能分析工具使用实例如下：http://localhost/xhprof/examples/sample.php http://localhost/xhprof/xhprof_html/callgraph.php?run php、xhprof、dot 8年前 6816 浏览
