技术&生活

tar -zxvf xhprof-0.9.2.tgz
cd xhprof-0.9.2
/usr/local/php5.3/bin/phpize
./configure --with-php-config=/usr/local/php5.3/bin/php-config
make
make install

extension=xhprof.so
[xhprof]
xhprof.output_dir=/data/tmp/ #日志文件保存路径

// start profiling
xhprof_enable();
 
// run program
//这里就是你要检测的代码段，拿kohana为例，应该是：
require SYSPATH.'core/Bootstrap'.EXT;
// stop profiler
$xhprof_data = xhprof_disable();
 
//
// Saving the XHProf run
// using the default implementation of iXHProfRuns.
//
include_once $XHPROF_ROOT . "/xhprof_lib/utils/xhprof_lib.php";
include_once $XHPROF_ROOT . "/xhprof_lib/utils/xhprof_runs.php";
 
$xhprof_runs = new XHProfRuns_Default();
 
// Save the run under a namespace "xhprof_foo".
//
// **NOTE**:
// By default save_run() will automatically generate a unique
// run id for you. [You can override that behavior by passing
// a run id (optional arg) to the save_run() method instead.]
//
$run_id = $xhprof_runs->save_run($xhprof_data, "kohana");
 
echo "---------------\n".
     "Assuming you have set up the http based UI for \n".
     "XHProf at some address, you can view run at \n".
     "http://<xhprof-ui-address >/index.php?run=$run_id&source=kohana\n".
     "---------------\n";

# cd /root/php-5.2.13/ext/
# ./ext_skel --extname=yzmf

#cd yzmf   //进入目录：/root/php-5.2.13/ext/yzmf
#vi config.m4

document.domain='domain.com'

var obj=document.getElementById('child').contentWindow

var LAZY=(function(){
	var pResizeTimer = null;
	var imgs={};
	function addEventHandler (oTarget, sEventType, fnHandler) {
		if (oTarget.addEventListener) {
			oTarget.addEventListener(sEventType, fnHandler, false);
		} else if (oTarget.attachEvent) {
			oTarget.attachEvent("on" + sEventType, fnHandler);
		} else {
			oTarget["on" + sEventType] = fnHandler;
		}
	};
	function resize(){
		if(pResizeTimer) return '';
		pResizeTimer = setTimeout(function(){
							resize_run();
							try{
								clearTimeout(pResizeTimer);
							}
							catch(e){}
							pResizeTimer=null;
						}, 100);
	}
	function resize_run(){
		var min={};
		var max={};
        min.Top = document.body.scrollTop + document.documentElement.scrollTop;
		min.Left=document.documentElement.scrollLeft;
		max.Top=min.Top+document.documentElement.clientHeight;
		max.Left=min.Left+document.documentElement.clientWidth;
 
		for(var i in imgs){
			if(imgs[i]){
				var _img=imgs[i];
				var img=document.getElementById(i);
				var width = img.clientWidth;
				var height = img.clientHeight;
				var wh=position(img);
				if(
					(wh.Top>=min.Top && wh.Top<=max.Top)
					||
					((wh.Top+height)>=min.Top && wh.Top<=max.Top)
				)
				{
					img.src=_img.src;
					delete imgs[i];
				}
 
			}
		}
	}
 
	function position(o){
		var p={Top:0,Left:0};
		while(!!o){
			p.Top+=o.offsetTop;
			p.Left+=o.offsetLeft;
			o=o.offsetParent;
		}
		return p;
	}
 
	return {
		init:function(){
			for(var i=0;i<document.images.length;i++){
				var img = document.images[i];
				var config={};
				config.id = img.id;
				config.src = img.getAttribute('_src');
				if(config.src && !config.id){
					config.id = encodeURIComponent(config.src) + Math.random();
					img.id = config.id;
				}
				if(!config.id || !config.src) continue;
				LAZY.push(config);
			}
			return LAZY;
		},
		push:function(config){
			imgs[config.id] = config;
		},
		run:function(){
			resize_run();
			addEventHandler(window,'scroll',resize);
		}
	};
})();

<img src="" _src="path/to/img.jpg" />

LAZY.init().run();

var util=util || {};
util.Event = (function(){
	var sUserAgent = navigator.userAgent;
	var fAppVersion = parseFloat(navigator.appVersion);
	var isOpera = sUserAgent.indexOf("Opera") > -1;
	var isMinOpera4 = isMinOpera5 = isMinOpera6 = isMinOpera7 = isMinOpera7_5 = false;
	var isIE = sUserAgent.indexOf("compatible") > -1
           && sUserAgent.indexOf("MSIE") > -1
           && !isOpera;
	var isWin = (navigator.platform == "Win32") || (navigator.platform == "Windows");
 
	return {
		//获得事件对象，比如util.Event.addEvent(dom,'click',function(){var e=util.Event.getEvent();})
		getEvent: function(){
			if (window.event) {
				return util.Event.formatEvent(window.event);
			} else {
				return util.Event.getEvent.caller.arguments[0];//调用此方法的函数的第一个参数
			}
		},
		//获得时间的target，也就是事件的发生地，返回dom对象
		getTarget: function(e) {
			return e.target || e.srcElement;
		},
		//阻止冒泡，比如一个div里面嵌套了一个a，这两个标签都绑定了click事件，如果你想点击a标签的时候并不想执行div上面的click时间。可以用这个方法阻止
		stopPropagation: function(e) {
			if (e.stopPropagation) {
			  e.stopPropagation();
			}
			else {
			  e.cancelBubble = true;
			}
		},
		//阻止默认行为，比如一个a标签绑定一个click事件，如果你想阻止执行此事件之后并不做跳转，可以用这个方法
		preventDefault: function(e) {
			if (e.preventDefault) {
			  e.preventDefault();
			}
			else {
			  e.returnValue = false;
			}
		},
		//阻止冒泡或者捕捉和阻止默认行为
		stopEvent: function(e) {
			this.stopPropagation(e);
			this.preventDefault(e);
		},
		//增加一个事件 util.Event.addEvent(window,'load',function(){})
		addEvent:function (oTarget, sEventType, fnHandler) {
			if (oTarget.addEventListener) {
				oTarget.addEventListener(sEventType, fnHandler, false);
			} else if (oTarget.attachEvent) {
				oTarget.attachEvent("on" + sEventType, fnHandler);
			} else {
				oTarget["on" + sEventType] = fnHandler;
			}
		},
		//取消莫事件的绑定的某个函数
		removeEvent:function (oTarget, sEventType, fnHandler) {
			if (oTarget.removeEventListener) {
				oTarget.removeEventListener(sEventType, fnHandler, false);
			} else if (oTarget.detachEvent) {
				oTarget.detachEvent("on" + sEventType, fnHandler);
			} else {
				oTarget["on" + sEventType] = null;
			}
		},
		//格式化事件对象
		formatEvent:function (oEvent) {
			if (isIE && isWin) {
				oEvent.charCode = (oEvent.type == "keypress") ? oEvent.keyCode : 0;
				oEvent.eventPhase = 2;
				oEvent.isChar = (oEvent.charCode > 0);
				oEvent.pageX = oEvent.clientX + document.body.scrollLeft;
				oEvent.pageY = oEvent.clientY + document.body.scrollTop;
				oEvent.preventDefault = function () {
					this.returnValue = false;
				};
 
				if (oEvent.type == "mouseout") {
					oEvent.relatedTarget = oEvent.toElement;
				} else if (oEvent.type == "mouseover") {
					oEvent.relatedTarget = oEvent.fromElement;
				}
 
				oEvent.stopPropagation = function () {
					this.cancelBubble = true;
				};
 
				oEvent.target = oEvent.srcElement;
				oEvent.time = (new Date).getTime();
			}
			return oEvent;
		}
	};
})();

var objError = new Error(message);

try{
   ...
}catch(error){
     throw new Error("对不起，出错啦!");
}
//或者这样：
if(some false){
      throw new Error("对不起，出错啦！");
}