PHP全栈学习笔记7

时间  2020-01-20 标签 php 学习 笔记

PHP全栈学习笔记7

图形图像处理技术，gd库的强大支持，PHP的图像能够是PHP的强项，PHP图形化类库，jpgraph是一款很是好用的强大的图形处理工具。php

在PHP中加载GD库css

gd官方网址下载：html

http://www.boutell.com/gd

激活gd库，修改php.in文件数据库

将该文件中的“;extension=php_gd2.dll”选项前的分号“;”删除

验证GD库是否安装成功
输入“127.0.0.1/phpinfo.php”并按Enter键，检索到的安装信息，即说明GD库安装成功。windows

Jpgraph的安装与配置数组

官方网站http://www.aditus.nu/jpgraph/下载

解压到文件夹，编辑php.ini文件，修改include_path参数，如include_path = “.;F:\AppServ\www\jpgraph”，从新启动Apache。浏览器

配置Jpgraph类库的文件jpg-config.inc.php，
支持中文的配置服务器

DEFINE('CHINESE_TTF_FONT','bkai00mp.ttf');

默认图片格式的配置session

DEFINE("DEFAULT_GFORMAT","auto");

建立画布，能够经过imagecreate()函数实现ide

<?php
$im = imagecreate(200,100);
$white = imagecolorallocate($im, 255,65,150);
imagegif($im);
?>

gd库支持中文，但只能是utf-8，使用imageString()会显示乱码，只能接收utf-8编码格式，默认使用英文字体。

header()函数定义输出图像类型
imagecreatefromjpeg()函数载入图片
imagecolorallocate()函数设置输出字体颜色
iconv()函数对输出的中文字符串的编码格式进行转换
imageTTFText()函数向照片中添加文字

<?php
header("content-type:image/jpeg");
$im = imagecreateformjpeg("images/photo.jpg");
$textcolor = imagecolorallocate($im, 35,35,23);

//定义字体
$fnt="c:/windows/fonts/simhei.ttf";
//定义输出字体串
$motto = iconv("gb2312","utf-8","长白山");
// 写文字
imageTTFText($im, 220,0,200,233, $textcolor, $fnt, $motto); // 写TTF文字到图中
// 简历里jpeg图形
imageipeg($im);
imagedestory($im);
?>

使用图像处理技术生成的验证码

<?php
session_start();
header("content-type:image/png");  	  //设置建立图像的格式
$image_width=70;                      //设置图像宽度
$image_height=18;                     //设置图像高度
srand(microtime()*100000);         	  //设置随机数的种子
for($i=0;$i<4;$i++){                  //循环输出一个4位的随机数
   $new_number.=dechex(rand(0,15));
}
$_SESSION[check_checks]=$new_number;    //将获取的随机数验证码写入到SESSION变量中     

$num_image=imagecreate($image_width,$image_height);  //建立一个画布
imagecolorallocate($num_image,255,255,255);     	 //设置画布的颜色
for($i=0;$i<strlen($_SESSION[check_checks]);$i++){  //循环读取SESSION变量中的验证码
   $font=mt_rand(3,5);                            	//设置随机的字体
   $x=mt_rand(1,8)+$image_width*$i/4;               //设置随机字符所在位置的X坐标
   $y=mt_rand(1,$image_height/4);                   //设置随机字符所在位置的Y坐标
   $color=imagecolorallocate($num_image,mt_rand(0,100),mt_rand(0,150),mt_rand(0,200));  	 //设置字符的颜色
   imagestring($num_image,$font,$x,$y,$_SESSION[check_checks][$i],$color);				     //水平输出字符
}
imagepng($num_image);      			//生成PNG格式的图像
imagedestroy($num_image);  			//释放图像资源
?>
<?php
session_start();
if($_POST["Submit"]!=""){
$checks=$_POST["checks"];
if($checks==""){
echo "<script> alert('验证码不能为空');window.location.href='index.php';</script>";
}
if($checks==$_SESSION[check_checks]){
	echo "<script> alert('用户登陆成功!');window.location.href='index.php';</script>";
}else{
	echo "<script> alert('您输入的验证码不正确!');window.location.href='index.php';</script>";
}
}
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>验证码应用</title>
<style type="text/css">
<!--
.STYLE1 {
	font-size: 12px;
	color: #FFFFFF;
	font-weight: bold;
}
.style2 {font-weight: bold; font-size: 12px;}
-->
</style>
</head>
<body>
<form name="form" method="post" action="">
  <table width="1003" border="0" cellspacing="0" cellpadding="0">
    <tr>
      <td width="168" height="169" background="images/index_01.gif">&nbsp;</td>
      <td width="685" background="images/index_02.gif">&nbsp;</td>
      <td width="150" background="images/index_03.gif">&nbsp;</td>
    </tr>
    <tr>
      <td width="168" height="311" background="images/index_04.gif">&nbsp;</td>
      <td background="images/index_05.gif"><table width="675" height="169"  border="0" cellpadding="0" cellspacing="0">
        <tr>
          <td height="43" align="center" valign="baseline">&nbsp;</td>
          <td align="center" valign="middle">&nbsp;</td>
          <td align="center" valign="baseline">&nbsp;</td>
        </tr>
        <tr>
          <td width="382" height="24" align="center" valign="baseline">&nbsp;</td>
          <td width="207" height="24" valign="middle"><span class="style2">用户名</span><span class="STYLE1">
            <input  name="txt_user" id="txt_user" style="height:20px " size="10">
              </span></td>
          <td width="86" height="24" align="center" valign="baseline">&nbsp;</td>
        </tr>
        <tr>
          <td height="24" align="center" valign="baseline">&nbsp;</td>
          <td height="24" valign="middle"><span class="style2">密码</span><span class="STYLE1">
          <input  name="txt_pwd" type="password" id="txt_pwd" style="FONT-SIZE: 9pt; height:20px" size="10">
          </span></td>
          <td height="24" align="center" valign="baseline">&nbsp;</td>
        </tr>
        <tr>
          <td height="24" align="center" valign="baseline">&nbsp;</td>
          <td height="24" valign="middle"><span class="style2">验证码</span><span class="STYLE1">
          <input name="checks" size="6" style="height:20px ">
          <img src="checks.php" width="70" height="18" border="0" align="bottom"></span>&nbsp;&nbsp;</td>
          <td height="24" align="center" valign="baseline">&nbsp;</td>
        </tr>
        <tr>
          <td height="40" align="center" valign="baseline">&nbsp;</td>
          <td align="center" valign="baseline">&nbsp;&nbsp;&nbsp;&nbsp;<input type="submit" name="Submit" value="登陆"></td>
          <td align="center" valign="baseline">&nbsp;</td>
        </tr>
      </table></td>
      <td background="images/index_06.gif">&nbsp;</td>
    </tr>
    <tr>
      <td height="100">&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
  </table>
</form>
</body>
</html>

使用柱形图

<?php
include ("jpgraph/jpgraph.php");
include ("jpgraph/jpgraph_bar.php");

$datay=array(160,180,203,289,405,488,489,408,299,166,187,105);

//建立画布
$graph = new Graph(600,300,"auto");	
$graph->SetScale("textlin");
$graph->yaxis->scale->SetGrace(20);

//建立画布阴影
$graph->SetShadow();

//设置显示区左、右、上、下距边线的距离，单位为像素
$graph->img->SetMargin(40,30,30,40);

//建立一个矩形的对象
$bplot = new BarPlot($datay);

//设置柱形图的颜色
$bplot->SetFillColor('orange');	
//设置显示数字	
$bplot->value->Show();
//在柱形图中显示格式化的图书销量
$bplot->value->SetFormat('%d');
//将柱形图添加到图像中
$graph->Add($bplot);

//设置画布背景色为淡蓝色
$graph->SetMarginColor("lightblue");

//建立标题
$graph->title->Set("《PHP》");

//设置X坐标轴文字
$a=array("1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月");
$graph->xaxis->SetTickLabels($a); 

//设置字体
$graph->title->SetFont(FF_SIMSUN);
$graph->xaxis->SetFont(FF_SIMSUN); 

//输出矩形图表
$graph->Stroke();
?>

使用折线图统计

<?php
  		include ("jpgraph/jpgraph.php");
        include ("jpgraph/jpgraph_line.php");														//引用折线图LinePlot类文件
		$datay = array(8320,9360,14956,17028,13060,15376,25428,16216,28548,18632,22724,28460);		//填充的数据   
        $graph = new Graph(600,300,"auto");								//建立画布
        $graph->img->SetMargin(50,40,30,40);    						//设置统计图所在画布的位置，左边距50、右边距40、上边距30、下边距40，单位为像素
        $graph->img->SetAntiAliasing();									//设置折线的平滑状态
        $graph->SetScale("textlin");									//设置刻度样式
        $graph->SetShadow();											//建立画布阴影
        $graph->title->Set("2000年PHP图书月销售额折线图");	//设置标题
		$graph->title->SetFont(FF_SIMSUN,FS_BOLD);						//设置标题字体
        $graph->SetMarginColor("lightblue");							//设置画布的背景颜色为淡蓝色
        $graph->yaxis->title->SetFont(FF_SIMSUN,FS_BOLD);				//设置Y轴标题的字体
        $graph->xaxis->SetPos("min");
        $graph->yaxis->HideZeroLabel();
        $graph->ygrid->SetFill(true,'#EFEFEF@0.5','#BBCCFF@0.5');
        $a=array("1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月");			//X轴
        $graph->xaxis->SetTickLabels($a); 								//设置X轴
        $graph->xaxis->SetFont(FF_SIMSUN); 								//设置X坐标轴的字体
        $graph->yscale->SetGrace(20); 
   
        $p1 = new LinePlot($datay);										//建立折线图对象
        $p1->mark->SetType(MARK_FILLEDCIRCLE);							//设置数据坐标点为圆形标记
        $p1->mark->SetFillColor("red");									//设置填充的颜色
        $p1->mark->SetWidth(4);											//设置圆形标记的直径为4像素
        $p1->SetColor("blue");											//设置折形颜色为蓝色
        $p1->SetCenter();												//在X轴的各坐标点中心位置绘制折线
        $graph->Add($p1);												//在统计图上绘制折线
        $graph->Stroke();												//输出图像
?>

应用3D饼形图

<?php
include_once ("jpgraph/jpgraph.php");
include_once ("jpgraph/jpgraph_pie.php");
include_once ("jpgraph/jpgraph_pie3d.php");			//引用3D饼图PiePlot3D对象所在的类文件

$data = array(266036,295621,335851,254256,254254,685425);			//定义数组
$graph = new PieGraph(540,260,'auto');				//建立画布
$graph->SetShadow();								//设置画布阴影

$graph->title->Set("应用3D饼形图统计2000年商品的年销售额比率");			//建立标题
$graph->title->SetFont(FF_SIMSUN,FS_BOLD);			//设置标题字体
$graph->legend->SetFont(FF_SIMSUN,FS_NORMAL);			//设置图例字体

$p1 = new PiePlot3D($data);							//建立3D饼形图对象
$p1->SetLegends(array("IT数码","家电通信","家居日用","服装鞋帽","健康美容","食品烟酒"));
$targ=array("pie3d_csimex1.php?v=1","pie3d_csimex1.php?v=2","pie3d_csimex1.php?v=3",
			"pie3d_csimex1.php?v=4","pie3d_csimex1.php?v=5","pie3d_csimex1.php?v=6");
$alts=array("val=%d","val=%d","val=%d","val=%d","val=%d","val=%d");
$p1->SetCSIMTargets($targ,$alts);

$p1->SetCenter(0.4,0.5);					//设置饼形图所在画布的位置
$graph->Add($p1);							//将3D饼图形添加到图像中
$graph->StrokeCSIM();						//输出图像到浏览器

?>

应用柱形图依次统计2000年月销量

<?php
include ("jpgraph/jpgraph.php");
include ("jpgraph/jpgraph_bar.php");

$datay1=array(58,85,65,39,120,91,152,49,97,130,67);
$datay2=array(18,35,101,69,138,131,112,149,88,60,77);

$graph = new Graph(620,300,'auto');	
$graph->SetScale("textlin");
$graph->SetShadow();
$graph->SetMarginColor("yellow");							//设置画布背景色为淡蓝色
$graph->img->SetMargin(40,30,40,40);
$graph->xaxis->SetTickLabels($gDateLocale->GetShortMonth());

$graph->xaxis->title->Set('');
$graph->xaxis->title->SetFont(FF_SIMSUN,FS_BOLD);

$graph->title->Set('应用柱形图依次统计2000年月销量');
$graph->title->SetFont(FF_SIMSUN,FS_BOLD);

$bplot1 = new BarPlot($datay1);
$bplot2 = new BarPlot($datay2);

$bplot1->SetFillColor("orange");
$bplot2->SetFillColor("lightblue");

$bplot1->SetShadow();
$bplot2->SetShadow();

$bplot1->SetShadow();
$bplot2->SetShadow();

$gbarplot = new GroupBarPlot(array($bplot1,$bplot2));
$gbarplot->SetWidth(0.6);
$graph->Add($gbarplot);

$graph->Stroke();
?>

轿车的月销量统计

<?php
include ("jpgraph/jpgraph.php");
include ("jpgraph/jpgraph_line.php");
include ("jpgraph/jpgraph_scatter.php");

$datay1 = array(83,57,93,112,142,112,89,125,69,105,118,75);				//定义数组

//建立画布
$graph = new Graph(620,260);
$graph->SetMarginColor('red');
$graph->SetScale("textlin");
$graph->SetFrame(false);
$graph->SetMargin(30,5,25,20);

//建立标签标题、颜色、文字大小等属性
$graph->tabtitle->Set(' 2000年轿车的月销量统计  ' );
$graph->tabtitle->SetFont(FF_SIMSUN,FS_NORMAL,10);
$graph->tabtitle->SetColor('darkred','yellow');
// 设置X轴网格
$graph->xgrid->Show();

//应用月份作为X轴的坐标
$graph->xaxis->SetTickLabels($gDateLocale->GetShortMonth());

//建立折线对象
$p1 = new LinePlot($datay1);
$p1->SetColor("navy");

$p1->mark->SetType(MARK_IMG,'car.gif',0.8);				//载入汽车模型标记，并限制其输出大小

//输出汽车模型标记的位置
$p1->value->SetFormat('%d');
$p1->value->Show();
$p1->value->SetColor('darkred');
$p1->value->SetFont(FF_ARIAL,FS_BOLD,10);
$p1->value->SetMargin(14);					//设置汽车销量距汽车模型标记的距离

$p1->SetCenter();			//设置汽车销量及模型在X轴各坐标点居中显示
$graph->Add($p1);			//添加折线图到图像中
$graph->Stroke();			//输出图像到浏览器

?>

统计2006年、2007年、2008年、2009年农产品的产量比率

<?php
include ("jpgraph/jpgraph.php");
include ("jpgraph/jpgraph_pie.php");

//定义数组
$data1 = array(40,21,17,14,23);
$data2 = array(60,54,107,24,83);
$data3 = array(52,151,99,110,223);
$data4 = array(70,181,117,114,33);

//建立画布
$graph = new PieGraph(600,350,"auto");
$graph->SetShadow();

//设置标题名称
$graph->title->Set("统计2006年、2007年、2008年、2009年农产品的产量比率");
$graph->title->SetFont(FF_SIMSUN,FS_BOLD);
$graph->legend->SetFont(FF_SIMSUN,FS_NORMAL);

//建立饼形图对象
$size=0.13;
$p1 = new PiePlot($data1);
$p1->SetLegends(array("大豆","玉米","水稻","小麦","高梁"));
$p1->SetSize($size);
$p1->SetCenter(0.25,0.32);
$p1->value->SetFont(FF_FONT0);
$p1->title->Set("2006年");
$p1->title->SetFont(FF_SIMSUN,FS_BOLD);

$p2 = new PiePlot($data2);
$p2->SetSize($size);
$p2->SetCenter(0.65,0.32);
$p2->value->SetFont(FF_FONT0);
$p2->title->Set("2007年");
$p2->title->SetFont(FF_SIMSUN,FS_BOLD);

$p3 = new PiePlot($data3);
$p3->SetSize($size);
$p3->SetCenter(0.25,0.75);
$p3->value->SetFont(FF_FONT0);
$p3->title->Set("2008年");
$p3->title->SetFont(FF_SIMSUN,FS_BOLD);

$p4 = new PiePlot($data4);
$p4->SetSize($size);
$p4->SetCenter(0.65,0.75);
$p4->value->SetFont(FF_FONT0);
$p4->title->Set("2009年");
$p4->title->SetFont(FF_SIMSUN,FS_BOLD);

$graph->Add($p1);
$graph->Add($p2);
$graph->Add($p3);
$graph->Add($p4);

$graph->Stroke();

?>

文件系统

文件是用来存储数据的方式之一。
打开文件，关闭文件，读写文件，操做文件。

打开文件

resource fopen ( string filename, string mode [, bool use_include_path]);

关闭文件

bool fclose ( resource handle ) ;

<?php
	$f_open =fopen("../file.txt.","rb");	   //打开文件
	…    //对文件进行操做
	fclose($f_open)	 //操做完成后关闭文件				
?>

读取数据
能够读取一个字符,一行字串,整个文件
读取文件：readfile()、file()和file_get_contents()

readfile()函数
读入一个文件并将其写入到输出缓冲

int readfile(string filename)

file()函数读取整个文件的内容
file()函数将文件内容按行存放到数组中

array file(string filename)

file_get_contents()函数
将文件内容（filename）读入一个字符串

string file_get_contents(string filename[,int offset[,int maxlen]])

案例：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>读取整个文件</title>
<style type="text/css">
<!--
body,td,th {
	font-size: 12px;
}
body {
	margin-left: 10px;
	margin-top: 10px;
	margin-right: 10px;
	margin-bottom: 10px;
}
-->
</style></head>
<body>
<table border="1" cellspacing="0" cellpadding="0">
  <tr>
    <td width="250" height="25" align="right" valign="middle" scope="col">使用readfile()函数读取文件内容：</td>
    <td height="25" align="center" valign="middle" scope="col">
	<?php readfile('tm.txt'); ?>	</td>
  </tr>
  <tr>
    <td height="25" align="right" valign="middle">使用file()函数读取文件内容：</td>
    <td height="25" align="center" valign="middle">
	<?php
		$f_arr = file('tm.txt');
		foreach($f_arr as $cont){
			echo $cont."<br>";
		}
	?></td>
  </tr>
  <tr>
  	<td width="250" height="25" align="right" valign="middle" scope="col">使用file_get_contents()函数读取文件内容：</td>
	<td height="25" align="center" valign="middle" scope="col">
	<?php
	
		$f_chr = file_get_contents('tm.txt');
		echo $f_chr;
	
	?></td>
  </tr>
</table>
</body>
</html>

读取一行数据：fgets()和fgetss()

fgets()函数用于一次读取一行数据

string fgets( int handle [, int length] )

fgetss()函数是fgets()函数的变体，用于读取一行数据

string fgetss ( resource handle [, int length [, string 
allowable_tags]] )

fgets和fgetss的区别

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>fgets和fgetss的区别</title>
<style type="text/css">
<!--
body,td,th {
	font-size: 12px;
}
body {
	margin-left: 10px;
	margin-top: 10px;
	margin-right: 10px;
	margin-bottom: 10px;
}
-->
</style></head>
<body>
<table border="1" cellspacing="0" cellpadding="0">
  <tr>
    <td height="30" align="right" valign="middle" scope="col">使用fgets函数：</td>
    <td height="30" align="center" valign="middle" scope="col">
<?php
	$fopen = fopen('fun.php','rb');
	while(!feof($fopen)){
		echo fgets($fopen);
	}
	fclose($fopen);
?>	</td>
  </tr>
  <tr>
    <td height="30" align="right" valign="middle">使用fgetss函数：</td>
    <td height="30" align="center" valign="middle">
	<?php
	$fopen = fopen('fun.php','rb');
	while(!feof($fopen)){
		echo fgetss($fopen);
	}
	fclose($fopen);
?>	</td>
  </tr>
</table>
</body>
</html>

读取一个字符：fgetc() 读取任意长度的字串：fread()

string fgetc ( resource handle )

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>使用fgetc函数读取字符</title>
<style type="text/css">
<!--
body,td,th {
	font-size: 12px;
}
body {
	margin-left: 10px;
	margin-top: 10px;
	margin-right: 10px;
	margin-bottom: 10px;
}
-->
</style></head>
<body>
<pre>
<?php
	$fopen = fopen('03.txt','rb');
	while(false !== ($chr = fgetc($fopen))){
		echo $chr;
	}
	fclose($fopen);
?>
</pre>
</body>
</html>

string fread ( int handle, int length )

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>使用fread函数读取文件</title>
<style type="text/css">
<!--
body,td,th {
	font-size: 12px;
}
body {
	margin-left: 10px;
	margin-top: 10px;
	margin-right: 10px;
	margin-bottom: 10px;
}
-->
</style></head>
<body>
<?php
	$filename = "04.txt";
	$fp = fopen($filename,"rb");
	echo fread($fp,32);
	echo "<p>";
	echo fread($fp,filesize($filename));
?>
</body>
</html>

写入文件

使用fwrite()和file_put_contents()函数向文件中写入数据

fwrite()函数

int fwrite ( resource handle, string string [, int length] )

file_put_contents()函数

int file_put_contents ( string filename, string data [, int 
flags])

使用fwrite和file_put_contents函数写入数据

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>使用fwrite和file_put_contents函数写入数据</title>
<style type="text/css">
<!--
body,td,th {
	font-size: 12px;
}
body {
	margin-left: 10px;
	margin-top: 10px;
	margin-right: 10px;
	margin-bottom: 10px;
}
-->
</style></head>
<body>
<?php
	$filepath = "05.txt";
	$str = "此情可待成追忆	只是当时已惘然<br>";
	echo "用fwrite写入文件：";
	$fopen = fopen($filepath,'wb') or die('文件不存在');
	fwrite($fopen,$str);
	fclose($fopen);
	readfile($filepath);
	echo "<p>用file_put_contents写入文件：";
	file_put_contents($filepath,$str);
	readfile($filepath);
?>
</body>
</html>

操做文件

bool copy();
bool rename();
bool unlink();
int fileatime();
int filemtime();
int filesize();
array pathinfo();
string realpath();

目 录 处 理

打开/关闭目录
浏览目录
操做目录

opendir()函数

resource opendir ( string path)

closedir()函数

void closedir ( resource handle )

案例：

<?php  
$path = "D:\\55555\\www\\55\\55\\12" ;
if (is_dir($path)){						//检测是不是一个目录
	if ($dire = opendir($path))				//判断打开目录是否成功
		echo $dire;					//输出目录指针
}else{
	echo '路径错误';
	exit();
}
…									//其余操做
closedir($dire);							//关闭目录
?>

浏览目录，scandir()函数

array scandir ( string directory [, int sorting_order ])
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>浏览目录</title>
<style type="text/css">
<!--
body,td,th {
	font-size: 12px;
}
body {
	margin-left: 10px;
	margin-top: 10px;
	margin-right: 10px;
	margin-bottom: 10px;
}
-->
</style></head>
<body>
<?php  
	$path = 'E:\AppServ\www\mr\sl\13';
	if(is_dir($path)){
		$dir = scandir($path);
		foreach($dir as $value){
			echo $value."<br>";
		}
	}else{
		echo "目录路径错误！";
	}
?>
</body>
</html>

操做目录

bool mkdir
bool rmdir
string getcwd
bool chdir
float disk_free_space
string readdir
void rewinddir

高级应用
远程文件访问
文件指针
锁定文件

php.ini中配置,找到allow_url_fopen,设为ON

fopen('http://127.0.0.1/index.php','rb');

文件指针

1．rewind()函数

bool rewind ( resource handle )

2．fseek()函数

int fseek ( resource handle, int offset [, int whence] )

handle参数为要打开的文件
offset为指针位置或相对whence参数的偏移量，能够是负值
whence的值包括3种：
SEEK_SET，位置等于offset字节
SEEK_CUR，位置等于当前位置加上offset字节
SEEK_END，位置等于文件尾加上offset字节
若是忽略whence参数，系统默认为SEEK_SET

3．feof()函数

bool feof ( resource handle )

4．ftell()函数

int ftell ( resource handle )
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>文件指针函数</title>
<style type="text/css">
<!--
body,td,th {
	font-size: 12px;
}
body {
	margin-left: 10px;
	margin-top: 10px;
	margin-right: 10px;
	margin-bottom: 10px;
}
-->
</style></head>
<body>
<?php
$filename = "07.txt";
$total = filesize($filename);
if(is_file($filename)){
	echo "文件总字节数：".$total."<br>";
	$fopen = fopen($filename,'rb');
	echo "初始指针位置是：".ftell($fopen)."<br>";
	fseek($fopen,33);
	echo "使用fseek()函数后指针位置：".ftell($fopen)."<br>";
	echo "输出当前指针后面的内容：".fgets($fopen)."<br>";
	if(feof($fopen))
		echo "当前指针指向文件末尾：".ftell($fopen)."<br>";
	rewind($fopen);
	echo "使用rewind()函数后指针的位置：".ftell($fopen)."<br>";
	echo "输出前33字节的内容：".fgets($fopen,33);
	fclose($fopen);
}else{
	echo "文件不存在";
}
?>
</body>
</html>

锁定文件

bool flock ( int handle, int operation)

LOCK_SH取得共享锁定（读取程序）
LOCK_EX取得独占锁定（写入程序）
LOCK_UN释放锁定
LOCK_NB防止flock()在锁定时堵塞
operation的参数
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>使用flock函数</title>
</head>
<body>
<?php
	$filename = '08.txt';						//声明要打开的文件的名称
	$fd = fopen($filename,'w');					//以w形式打开文件
	flock($fd, LOCK_EX);						//锁定文件（毒针共享
	fwrite($fd, "hightman1");					//向文件中写入数据
	flock($fd, LOCK_UN);						//解除锁定
	fclose($fd);								//关闭文件指针
	readfile($filename);						//输出文件内容
?>
</body>
</html>

文件上传

文件上传是要经过http协议来实现的，要在php.ini文件中进行对上传文件的设置，要了解$_FILES变量和函数move_uploaded_file()函数实现上传。

要配置php.ini文件，在文件中找到file_uploads，若是值为on，说明服务器支持文件上传，若是为off，则表示不支持，upload_tmp_dir为上传文件临时位置，系统默认，也能够本身定。

upload_max_filesize为服务器容许上传的文件的最大值，默认2mb。max_execution_timePHP中一个指令所能执行的最大时间，memory_limitPHP中一个指令所分配的内存空间。

$_FILES[filename][name]
上传文件的文件名

$_FILES[filename][size]
文件大小

$_FILES[filename][tmp_name]
为临时文件名

$_FILES[filename][type]
文件的类型

$_FILES[filename][error]
上传文件的结果。若是返回0，说明文件上传成功
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>$_FIELS变量</title>
<style type="text/css">
<!--
body,td,th {
	font-size: 12px;
}
body {
	margin-left: 10px;
	margin-top: 10px;
	margin-right: 10px;
	margin-bottom: 10px;
}
-->
</style></head>
<body>
<table width="500" border="0" cellspacing="0" cellpadding="0">
<form action="" method="post" enctype="multipart/form-data">
  <tr>
    <td width="150" height="30" align="right" valign="middle">请选择上传文件：</td>
    <td width="250"><input type="file" name="upfile"/></td>
    <td width="100"><input type="submit" name="submit" value="上传" /></td>
  </tr>
</form>
</table>
<?php
	if(!empty($_FILES)){
		foreach($_FILES['upfile'] as $name => $value)
			echo $name.' = '.$value.'<br>';
	}
?>
</body>
</html>

文件上传函数

move_uploaded_file()函数上传文件

bool move_uploaded_file ( string filename, string destination )

将上传文件存储到指定的位置

单文件上传

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>单文件上传</title>
<style type="text/css">
<!--
body,td,th {
	font-size: 12px;
}
body {
	margin-left: 10px;
	margin-top: 10px;
	margin-right: 10px;
	margin-bottom: 10px;
}
--> 
</style></head>
<body>
<?php
	if(!empty($_FILES[up_file][name])){
	$fileinfo = $_FILES[up_file];
		if($fileinfo['size'] < 1000000 && $fileinfo['size'] > 0){
			move_uploaded_file($fileinfo['tmp_name'],$fileinfo['name']);
			echo '上传成功';
		}else{
			echo '文件太大或未知';
		}
	}
?>
<table width="385" height="185" border="0" cellpadding="0" cellspacing="0" background="images/bg.JPG">
  <tr>
    <td width="142" height="80">&nbsp;</td>
    <td width="174">&nbsp;</td>
    <td width="69">&nbsp;</td>
  </tr>
<form action="" method="post" enctype="multipart/form-data" name="form">
  <tr>
    <td height="30">&nbsp;</td>
    <td align="left" valign="middle"><input name="up_file" type="file" size="12" /></td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <td height="27" align="right">&nbsp;</td>
    <td align="center" valign="top">&nbsp;&nbsp;<input type="image" name="imageField" src="images/fg.bmp"></td>
    <td>&nbsp;</td>
  </tr>
  </form>
  <tr>
    <td height="48">&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
</table>

</body>
</html>

多文件上传

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>多文件上传</title>
<style type="text/css">
<!--
body,td,th {
	font-size: 12px;
}
body {
	margin-left: 10px;
	margin-top: 10px;
	margin-right: 10px;
	margin-bottom: 10px;
}
-->
</style>
</head>
<body>
请选择要上传的文件
<form action="" method="post" enctype="multipart/form-data">
  <table border="1" cellpadding="1" cellspacing="1" bordercolor="#FFFFFF" bgcolor="#CCCCCC" id="up_table" >
    <tbody id="auto">
      <tr id="show" >
        <td bgcolor="#FFFFFF">上传文件 </td>
        <td bgcolor="#FFFFFF"><input name="u_file[]" type="file"></td>
      </tr>
      <tr>
        <td bgcolor="#FFFFFF">上传文件 </td>
        <td bgcolor="#FFFFFF"><input name="u_file[]" type="file"></td>
      </tr>
      <tr>
        <td bgcolor="#FFFFFF">上传文件 </td>
        <td bgcolor="#FFFFFF"><input name="u_file[]" type="file"></td>
      </tr>
      <tr>
        <td bgcolor="#FFFFFF">上传文件 </td>
        <td bgcolor="#FFFFFF"><input name="u_file[]" type="file"></td>
      </tr>
    </tbody>
    <tr>
      <td colspan="4" bgcolor="#FFFFFF"><input type="submit" value="上传" /></td>
    </tr>
  </table>
</form>
<?php
if(!empty($_FILES[u_file][name])){
	$file_name = $_FILES[u_file][name];
	$file_tmp_name = $_FILES[u_file][tmp_name];
	for($i = 0; $i < count($file_name); $i++){
		if($file_name[$i] != ''){
			move_uploaded_file($file_tmp_name[$i],$i.$file_name[$i]);
			echo '文件'.$file_name[$i].'上传成功。改名为'.$i.$file_name[$i].'<br>';
		}
	}
}
?>
</body>
</html>

访问量：

<?php session_start();  
if($_SESSION[temp]==""){ //判断$_SESSION[temp]==""的值是否为空,其中的temp为自定义的变量
	if(($fp=fopen("counter.txt","r"))==false){ 
		echo "打开文件失败!";
	}else{ 
		$counter=fgets($fp,1024);		//读取文件中数据
		fclose($fp);                    //关闭文本文件
		$counter++;                     //计数器增长1
		$fp=fopen("counter.txt","w");   //以写的方式打开文本文件<!---->
		fputs($fp,$counter);            //将新的统计数据增长1
		fclose($fp);    
	}                   				//关闭文	
 	$_SESSION[temp]=1; 					//登陆之后,$_SESSION[temp]的值不为空,给$_SESSION[temp]赋一个值1
}
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>经过文本文件统计页面访问量</title>
</head>
<body>
<img src="gd1.php" />
</BODY>
</HTML>

<?php 
//以图形的形式输出数据库中的记录数

if(($fp=fopen("counter.txt","r"))==false){
	echo "打开文件失败!";
}else{
	$counter=fgets($fp,1024);
	fclose($fp);
    //经过GD2函数建立画布
	$im=imagecreate(240,24);
	$gray=imagecolorallocate($im,255,255,255);
	$color =imagecolorallocate($im,rand(0,255),rand(0,255),rand(0,255));    //定义字体颜色
	//输出中文字符
	$text=iconv("gb2312","utf-8","网站的访问量:");       					//对指定的中文字符串进行转换
	$font = "Fonts/FZHCJW.TTF";  
	imagettftext($im,14,0,20,18,$color,$font,$text);       					//输出中文
	//输出网站的访问次数
	imagestring($im,5,160,5,$counter,$color);
	imagepng($im);
	imagedestroy($im);
}  	

?>

限制大小的文件上传

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>限制大小的文件上传</title>
<style type="text/css">
<!--
body {
	margin-left: 00px;
	margin-top: 0px;
	margin-right: 0px;
	margin-bottom: 0px;
}
-->
</style></head>

<body>
<table width="385" height="185" border="0" cellpadding="0" cellspacing="0" background="images/bg.JPG">
  <tr>
    <td width="142" height="80">&nbsp;</td>
    <td width="174">&nbsp;</td>
    <td width="69">&nbsp;</td>
  </tr>
  <form name="form1" method="post" action="index_ok.php" enctype="multipart/form-data">
  <tr>
    <td height="30">&nbsp;</td>
    <td align="left" valign="middle"><input name="files" type="file" id="files" size="13" maxlength="150">   </td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <td height="27" align="right">&nbsp;</td>
    <td align="center" valign="top">&nbsp;&nbsp;<input type="image" name="imageField" src="images/fg.bmp"></td>
    <td>&nbsp;</td>
  </tr>
  </form>
  <tr>
    <td height="48">&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
</table>
</body>
</html>

<?php 
	if($_FILES['files']['name']==true){
		$filesize=$_FILES['files']['size'];
		if($filesize>1000000){
			echo "对不起,您上传的文件超过规定的大小!!";
			echo "<meta http-equiv=\"Refresh\" content=\"3;url=index.php\">将在3秒钟后返回前页...";
		}else{
			$path = './upfiles/'. $_FILES['files']['name'];
			if (move_uploaded_file($_FILES['files']['tmp_name'],$path)) { 
				echo "上传成功!!";
				echo "<meta http-equiv=\"Refresh\" content=\"3;url=index.php\">"; 
			}else{
				echo "文件上传失败!!";
          		echo "<meta http-equiv=\"Refresh\" content=\"3;url=index.php\">";
			}
		}
	}
?>

结言

好了，欢迎在留言区留言，与你们分享你的经验和心得。

感谢你学习今天的内容，若是你以为这篇文章对你有帮助的话，也欢迎把它分享给更多的朋友，感谢。

感谢！承蒙关照！您真诚的赞扬是我前进的最大动力！

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转载于:https://www.cnblogs.com/dashucoding/p/11140281.html

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