PHP实用小程序（四）

<HTML>

<HEAD>

<TITLE>访问文件时间属性</TITLE>

</HEAD>

<BODY>

<?

    $LastAccess = fileatime("data.txt");

    print("文件最后的存取时间为：");

    print(date("l F d, Y", $LastAccess));

    print("<br>");

?>

<?

    $LastA = filectime("data.txt");

    print("文件最后的改变时间：");

    print(date("l F d, Y", $LastA));

    print("<br>");

?>

<?

    $LastB = filemtime("data.txt");

    print("文件最后的修改时间：");

    print(date("l F d, Y", $LastB));

    print("<br>");

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>创建目录函数</TITLE>

</HEAD>

<BODY>

<?

    if(mkdir("myDir1", 0777))       //创建目录的函数

    {

        print("目录创建成功");        //目录建立成功

    }

    else

    {

        print("目录建立失败!");       //目录建立失败

    }

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>浏览目录</TITLE>

</HEAD>

<BODY>

<?

    // 使用表格浏览目录的结构

    print("<TABLE BORDER=\"1\">\n");

    // 创建表格的头

    print("<TR><font color='red'>\n");

    print("<TH>文件名</TH>\n");

    print("<TH>文件的大小</TH>\n");

    print("</font></TR>\n");

    $myDirectory = opendir(".");        // 建立操作目录的句柄

    // 读出目录中的每一个子项

    while($entryName = readdir($myDirectory))

    {

        print("<TR>");

        print("<TD>$entryName</TD>");

        print("<TD ALIGN=\"right\">");

        print(filesize($entryName));

        print("</TD>");

        print("</TR>\n");

    }

    closedir($myDirectory);         // 关闭目录

    print("</TABLE>\n");

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>取得浏览器的信息</TITLE>

</HEAD>

<BODY>

<?php

function list_array ($array)        //定义函数

    {

         while (list ($key, $value) = each ($array))

         {

         $str= "<b>$key:</b> $value<br>\n";

         }

        return $str;

    }

 echo "$HTTP_USER_AGENT<hr>\n";

 $browser = get_browser();

 print("<br>");

 echo list_array ((array) $browser);

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>PHP相关信息</TITLE>

</HEAD>

<BODY>

<?

    phpinfo();

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>常用的数值判断函数</TITLE>

</HEAD>

<BODY>

<?

    //判断数组

    $colors = array("red", "blue", "green");

    if(is_array($colors))

    {

        print("colors is an array"."<br>");

    }

    //双精度数判断

    $Temperature = 15.23;

    if(is_double($Temperature))

    {

        print("Temperature is a double"."<br>");

    }

    //整数判断

    $PageCount = 2234;

    if(is_integer($PageCount))

    {

        print("$PageCount is an integer"."<br>");

    }

    //对象判断

    class widget

    {

        var $name;

        var $length;

    }

    $thing = new widget;

    if(is_object($thing))

    {

        print("thing is an object"."<br>");

    }

    //字符判断

    $Greeting = "Hello";

    if(is_string($Greeting))

    {

        print("Greeting is a string"."<br>");

    }

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>数组排序的使用</TITLE>

</HEAD>

<BODY>

<?

    // 构造一个数组变量

    $users = array("bob"=>"Yobert",

        "steve"=>"Btephen",

        "jon"=>"Aonathon");

    for(reset($users); $index=key($users); next($users))

    {

        print("$index : $users[$index] <BR>\n");

    }

    print("<hr>");

    // 使数组排序

    asort($users);

    // 打印排序后的数组

    for(reset($users); $index=key($users); next($users))

    {

        print("$index : $users[$index] <BR>\n");

    }

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>常用数组函数</TITLE>

</HEAD>

<BODY>

<?

    $colors = array("red", "green", "blue","yellow");

    print("数组的个数：".count($colors)."<br>");//数组的个数

    print("数组的当前值：".current($colors)."<br>");//当前的值

    end($colors);

    print("数组的最后一个的值：".current($colors)."<br>");

    print("<hr>");

    $slice = each($colors);//

    print("each()函数的使用："."<br>");

    print($slice[0] . "====" . $slice[1] . "<BR>\n");

    print($slice['key'] . "====" . $slice['value'] . "<BR>\n");

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>常用字符串函数(一)</TITLE>

</HEAD>

<BODY>

<?

    $first = "abc";

    $second = "aBc";

    if(strcmp($first, $second) == 0)//字串比较

    {

        print("字符串相等:"."<hr>");

    }

    else

    {

        print("字符串不相等"."<hr>");

    }

?>

<?

    print("a short string ".strlen("a short string")."<hr>");//字串长度

?>

<?

    $text = "hello world";

    print(strpos($text, "w")."<hr>");//寻找字串中某字元最先出现处

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>常用字符串函数(二)</TITLE>

</HEAD>

<BODY>

<?

    $text = "My dog's name is Angus.";

    //print Angus

    print(substr($text, 17, 5)."<hr>");//取出子串

?>

<?

    //切开字串

    // create a demo string

    $line = "leon\tatkinson\tleon@clearink.com";

    // loop while there are still tokens

    for($token = strtok($line, "\t");

        $token != "";

        $token = strtok("\t"))

    {

        print("token: $token<BR>\n");

    }

?>

<?

    //传回字串中某字串开始处至结束的字串

    $text = "Although this is string, it's not very long.";

    print("<hr>".strstr($text, ","));

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>常用字符串函数(三)</TITLE>

</HEAD>

<BODY>

<?

    //颠倒字串

    print("abcdefg  颠倒  ");

    print(strrev("abcdefg")."<hr>");

    //小写字串

    print("小写: ".strtolower("Hello World")."<hr>");

    //大写字串

    print("大写: ".strtoupper("Hello World")."<hr>");

    //去空格

    $text = "     whitespace      ";

    print("\"" . trim($text) . "\"");

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>编码和解码函数</TITLE>

</HEAD>

<BODY>

<?

    $data = "VGhpcyBpcyBhIAptdWx0aS1saW5lIG1lc3NhZ2UK";//解码前的值

    print ($data);

    print(base64_decode($data));               //进行解码

?>

<?

    print("<hr>");

    $text = "这是一个多行信息\n";

    print ($text);

    print(base64_encode($text));               //编码

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>常用数学函数(一)</TITLE>

</HEAD>

<BODY>

<?

    print(abs(-13));//打印绝对值

?>

<?

    // 从 -1 到1打印acos函数的值

    print("<TABLE BORDER=\"1\">\n");

    print("<TR><TH>x</TH><TH>acos(x)</TH></TR>\n");

    for($index = -1; $index <= 1; $index += 0.25)

    {

        print("<TR>\n");

        print("<TD>$index</TD>\n");

        print("<TD>" . acos($index) . "</TD>\n");

        print("</TR>\n");

    }

    print("</TABLE>\n");

?>

<?

    //  从 -1 到 1打印asin函数的值

    print("<TABLE BORDER=\"1\">\n");

    print("<TR><TH>x</TH><TH>asin(x)</TH></TR>\n");

    for($index = -1; $index <= 1; $index += 0.25)

    {

        print("<TR>\n");

        print("<TD>$index</TD>\n");

        print("<TD>" . asin($index) . "</TD>\n");

        print("</TR>\n");

    }

    print("</TABLE>\n");

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>常用时间函数(二)</TITLE>

</HEAD>

<BODY>

<?

    print("pi=".pi());

    print("<br>");

    print("sin(0.5 * pi())=".sin(0.5 * pi()));

    print("<br>");

    print("cos(2 * pi())=".cos(2 * pi()));

    print("<br>");

    //打印从1到100中间的10个随机的数

    for($index = 0; $index < 10; $index++)

    {

        print(rand(1,100) . "<BR>\n");

    }

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>日期检查函数</TITLE>

</HEAD>

<BODY>

<?

    if(checkdate(2,18,1970))//检查日期函数

    {

        print("2,18,1970  :"."这是一个正确的日期格式");

    }

    else

    {

        print("这不是一个正确的日期格式");

    }

    if(checkdate(52,18,1970))//检查日期函数

    {

        print("这是一个正确的日期格式");

    }

    else

    {

        print("52,18,1970  :"."这不是一个正确的日期格式");

    }

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>常用时间函数(一)</TITLE>

</HEAD>

<BODY>

<?

    print(date("h:i A l"));

    print("<BR>\n");

    print(date("F dS, Y"));

?>

<?

    $current_date = getdate(time());

    print("<hr>");

    printf("%d:%d:%d",

        $current_date["hours"],

        $current_date["minutes"],

        $current_date["seconds"]);

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>常用时间函数(二)</TITLE>

</HEAD>

<BODY>

<?

    print("开始时间:". microtime() . "<BR>\n");

    for($index = 0; $index < 10; $index++)

    {

        print("tick ");

    }

    print("<br>"."停止: " . microtime() . "<BR>\n");

?>

<?

    $CurrentHour = date("h");

    print("从现在开始50小时以后为: ");

    print(date("h:i A l F dS, Y",

        mktime($CurrentHour+50)));

    print("<BR>\n");

?>

<?

    $CurrentTime = time();

    print($CurrentTime);

?>

</BODY>

</HTML>

<HTML>

<HEAD>

<TITLE>程序暂停函数</TITLE>

</HEAD>

<BODY>

<?

    print(microtime());

    sleep(10);      //程序暂停10s

    print("<br>\n");

    print(microtime());

    print("<hr>");

    print(microtime());

    usleep(30);     //暂定30ms

    print("<br>\n");

    print(microtime());

?>

</BODY>

</HTML>

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PHP实用小程序（四）

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