学php必收藏的几个经典代码-php教程-PHP中文网

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学php必收藏的几个经典代码

PHP中文网

May 17, 2016 am 09:37 AM

php

经典循环例子

<HTML> 
<HEAD> 
<TITLE>经典循环例子</TITLE> 
</HEAD> 
<BODY> 
<? 
    for($counter = 1; $counter <= 6; $counter++)        //循环6次 
    { 
        print("<B>counter is $counter</B><BR>\n");    //打印6次 
    }     
?> 
</BODY> 
</HTML>

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for的高级运用

<HTML> 
<HEAD> 
<TITLE>for的高级运用</TITLE> 
</HEAD> 
<BODY> 
<? 
    /*  
    ** 打印必要的说明文字  
    */
    print("<B>距离星期一还有几天？</B>\n"); 
    print("<OL>\n"); 
    for($currentDate = date("U");             //定义$currentDate时间格式 
        date("l", $currentDate) != "Monday";     //判断是不是当前系统时间是Monday 
        $currentDate += (60 * 60 * 24))        //当前时间加上1天 
    { 
        /*  
        ** 打印时间名称  
        */
        print("<LI>" . date("l", $currentDate) . "\n"); 
    } 
    print("</OL>\n"); 
?> 
</BODY> 
</HTML>

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函数的简单调用:

<HTML> 
<HEAD> 
<TITLE>简单的函数</TITLE> 
</HEAD> 
<BODY> 
<FONT SIZE=5> 
<? 
    function printBold($inputText)            //定义function printBold（） 
    { 
        print("<B>" . $inputText . "</B>");    ////打印$inputText 
    } 
    print("这行没有加重！<BR>\n");            //直接打印字符串 
    printBold("这行加重了！！！");            //调用function printBold()函数 
    print("<BR>\n"); 
    print("这行没有加重！<BR>\n");            //直接打印字符串 
?> 
</FONT> 
</BODY> 
</HTML>

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有返回值的函数

<HTML> 
<HEAD> 
<TITLE>有返回值的函数</TITLE> 
</HEAD> 
<BODY> 
<FONT SIZE=5> 
<? 
    function makeBold($inputText)        //定义function makeBold()函数 
    { 
        $boldedText = "<B>"; 
        $boldedText .= $inputText; 
        $boldedText .= "</B>"; 
        return($boldedText);        //返回变量$boldedText 
    } 
    print("这行没有加重！！！<BR>\n");    //直接打印字符串     
    print(makeBold("这行被加重了！！！") . "<BR>\n");//调用function makeBold()函数 
    print("这行没有加重！！！<BR>\n");    //直接打印字符串 
?> 
</SIZE> 
</BODY> 
</HTML>

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有默认参数的函数

<HTML> 
<HEAD> 
<TITLE>有默认参数的函数</TITLE> 
</HEAD> 
<BODY> 
<FONT SIZE=5> 
<? 
    function printColored($Text, $Color="black")        //定义function函数 
    { 
        print("<FONT COLOR=\"$Color\">$Text</FONT>");    //获取字符串的内容和颜色 
    } 
    printColored("这是黑颜色的字！");            //调用function函数 
    print("<BR><BR>\n"); 
    printColored("这是蓝颜色的字！", "blue");            //调用function函数 
    print("<BR>\n"); 
?> 
</SIZE> 
</BODY> 
</HTML>

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用的规算法判断是否是整数

<HTML> 
<HEAD> 
<TITLE>判断整数</TITLE> 
</HEAD> 
<BODY> 
<? 
    function checkInteger($Number) 
    { 
        if($Number > 1) 
        { 
            /* 整数减1仍然是整数 */
            return(checkInteger($Number-1)); 
        } 
        elseif($Number < 0) 
        { 
            /* 对于一个负数，*/
            /* 可以分析它的绝对值*/
            return(checkInteger((-1)*$Number-1));//取绝对值，把负数按整数分析 
        } 
        else
        { 
            if(($Number > 0) AND ($Number < 1)) 
            { 
                return("当然不是"); 
            } 
            else
            { 
                /* 0 和 1 是整数       */
                /* 根据相关数学定义 */
                return("是的"); 
            } 
        } 
    } 
    print("<B>0是整数吗？</B>" .  
        checkInteger(0) . "<BR>\n"); 
    print("<B>7是整数吗？</B> " .  
        checkInteger(7) . "<BR>\n"); 
    print("<B>3.5呢？</B>" . checkInteger(3.5) . "<BR>\n"); 
    print("<B>那么-5呢？</B>" . checkInteger(-5) . "<BR>\n"); 
    print("<B>还有-9.2？</B>" . checkInteger(-9.2) . "<BR>\n"); 
?> 
</BODY> 
</HTML>

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初始化数组

<HTML> 
<HEAD> 
<TITLE>初始化数组</TITLE> 
</HEAD> 
<FONT SIZE=5> 
<? 
    $monthName = array(1=>"January", "February", "March",//初始化一个数组 
        "April", "May", "June", "July", "August", 
        "September", "October", "November", "December"); 
    print(" 英语的“5月”是<B> $monthName[5] </B>。<BR>\n");//打印数组中的第6个元素 
?> 
</FONT> 
</BODY> 
</HTML> 
获取数组中的元素  
<HTML> 
<HEAD> 
<TITLE>获取数组中的元素</TITLE> 
</HEAD> 
<? 
    $monthName = array( 
    /*定义$monthName[1]到$monthName[12]*/
        1=>"January", "February", "March", 
        "April", "May", "June",  
        "July", "August", "September",  
        "October", "November", "December", 
    /*定义$monthName["Jan"]到$monthName["Dec"]*/
        "Jan"=>"January", "Feb"=>"February", 
        "Mar"=>"March", "Apr"=>"April",  
        "May"=>"May", "Jun"=>"June",  
        "Jul"=>"July", "Aug"=>"August", 
        "Sep"=>"September", "Oct"=>"October",  
        "Nov"=>"November", "Dec"=>"December", 
    /*定义$monthName["Jan"]到$monthName["Dec"]*/
        "January"=>"January", "February"=>"February", 
        "March"=>"March", "April"=>"April",  
        "May"=>"May", "June"=>"June",  
        "July"=>"July", "August"=>"August", 
        "September"=>"September", "October"=>"October",  
        "November"=>"November", "December"=>"December"
        ); 
    /*打印相关的元素*/
    print("Month <B>5</B> is <B>" . $monthName[5]. "</B><BR>\n"); 
    print("Month <B>Aug</B> is <B>" . $monthName["Aug"] . "</B><BR>\n"); 
    print("Month <B>June</B> is <B>" . $monthName["June"] . "</B><BR>\n"); 
?> 
</BODY> 
</HTML>

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创建一个多维数组

<HTML> 
<HEAD> 
<TITLE>创建一个多维数组</TITLE> 
</HEAD> 
<? 
    $Cities = array(                //二维数组array（） 
        "华北地区"=>array( 
            "北京市", 
            "天津市", 
            "石家庄"
            ), 
        "西北地区"=>array( 
            "西安", 
            "拉萨"
            ) 
        ); 
    print("华北地区: ".$Cities["华北地区"][0]);    //打印$Cities["华北地区"][0] 
?> 
</BODY> 
</HTML>

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PHP 4.0实现表格状打印

<HTML> 
<HEAD> 
<TITLE>实现表格状打印</TITLE> 
</HEAD> 
<BODY> 
<? 
    /*  
    ** 数据表格化  
    */
    print("<TABLE bgcolor=&#39;ffccoo&#39; BORDER=\"1\">\n"); // 表格开始 
    for($Row=1; $Row <= 12; $Row ++) 
    { 
        print("<TR>\n"); // 开始行 
        // do each column 
        for($Column=1; $Column <= 12; $Column ++) 
        { 
            print("<TD>");//开始列 
            print($Row * $Column);//表格元素乘积 
            print("</TD>"); 
        } 
        print("</TR>\n"); // 行结束 
    } 
    print("</TABLE>\n"); // 表格结束 
?> 
</BODY> 
</HTML>

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查看系统的一些变量

<HTML> 
<HEAD> 
<TITLE>查看PHP的环境变量</TITLE> 
</HEAD> 
<BODY> 
<? 
    print("你正在用文件的名字为： "); 
    print(__FILE__); 
    print(" <BR>\n"); 
    print("<hr>"); 
    print("你的操作系统为： "); 
    print(PHP_OS); 
    print("<hr>"); 
    print("你的php的版本为： "); 
    print(PHP_VERSION) 
?> 
</BODY> 
</HTML>

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打开本地或者远程文件

<HTML> 
<HEAD> 
<TITLE>打开本地或者远程文件</TITLE> 
</HEAD> 
<BODY> 
<? 
    print("<H3>通过http协议打开文件</H3>\n"); 
    // 通过 http 协议打开文件 
    if(!($myFile = fopen("d:web/web/php/test/data.txt", "r"))) 
    { 
        print("文件不能打开"); 
        exit; 
    } 
    while(!feof($myFile))                //循环 
    { 
                            // 按行读取文件中的内容 
        $myLine = fgetss($myFile, 255); 
        print("$myLine <BR>\n"); 
    } 
    // 关闭文件的句柄 
    fclose($myFile); 
?> 
</BODY> 
</HTML> 
打开文件的几种方式比较  
<HTML> 
<HEAD> 
<TITLE>读取文件内容</TITLE> 
</HEAD> 
<BODY> 
<? 
    // 打开文件同时打印文件的每一个字符 
    if($myFile = fopen("data.txt", "r")) 
    { 
    while(!feof($myFile)) 
    { 
        $myCharacter = fgetc($myFile); 
        print($myCharacter); 
    } 
    fclose($myFile); 
    }     
?> 
<? print("<hr>");?> 
<? 
    // 打开文件同时打印文件的每一行 
    if($myFile = fopen("data.txt", "r")) 
    { 
        while(!feof($myFile)) 
        { 
            $myLine = fgets($myFile, 255); 
            print($myLine); 
        } 
    fclose($myFile); 
    }     
?> 
<? print("<hr>");?> 
<? 
    /* 打开文件同时打印文件的每一行, 
    同时去掉取回字符串中的 HTML 语言 
    */
    if($myFile = fopen("data.txt", "r")) 
    { 
        while(!feof($myFile)) 
        { 
            $myLine = fgetss($myFile, 255); 
            print($myLine); 
        } 
        fclose($myFile); 
    }     
?> 
</BODY> 
</HTML>

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访问文件常见属性

<HTML> 
<HEAD> 
<TITLE>访问文件常见属性</TITLE> 
</HEAD> 
<BODY> 
<BR> 
<? 
    print("文件的所有者（UID 值）："); 
    print(fileowner("data.txt")."<br>"); 
    print("文件的大小："); 
    print(filesize("data.txt")."<br>"); 
    print("文件的类型："); 
    print(filetype("data.txt")."<br>"); 
?> 
</BODY> 
</HTML>

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调用文本文件内容

<HTML> 
<HEAD> 
<TITLE>调用文本文件内容</TITLE> 
</HEAD> 
<BODY> 
<CENTER> 
<? 
    // 打开文件同时，打印每一行 
    $myFile = file( "data.txt"); 
    for($index = 0; $index < count($myFile); $index++) 
    { 
        print($myFile[$index]."<BR>"); 
    } 
?> 
</CENTER> 
</BODY> 
</HTML>

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创建目录函数

<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>

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浏览目录

<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=&#39;red&#39;>\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>

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PHP相关信息

<HTML> 
<HEAD> 
<TITLE>PHP相关信息</TITLE> 
</HEAD> 
<BODY> 
<? 
    phpinfo(); 
?> 
</BODY> 
</HTML> 
常用的数值判断函数  
<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>

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文件上传界面

<HTML>  
<HEAD>  
<TITLE>文件上传界面</TITLE>  
</HEAD>  
<BODY><TABLE><CENTER>  
<?  
if($UploadAction){ 
$UploadAction=0;  
$TimeLimit=60;         
/*设置超时限制时间默认时间为 30s，设置为0时为不限时 */ 
set_time_limit($TimeLimit);  
If(($Upfile != "none")&&  
($Upfile != ""))  
{  
$Filepath="d:\web\web\php\test";                            //上载文件存放路径 
$FileName=$Filepath.$Upfile_name;  
if($Upfile_size <1024)                        //上载文件大小  
{$FileSize = (string)$Upfile_size . "字节";}  
elseif($Upfile_size <(1024 * 1024))  
{ 
$FileSize = number_format((double)($Upfile_size / 1024), 1) . " KB"; 
}  
else 
{  
$FileSize = number_format((double)($Upfile_size/(1024*1024)),1)."MB";  
}  
if(!file_exists($FileName))  
{  
if(copy($Upfile,$FileName))  
{unlink($Upfile);  
echo "<br><br>\n";          
echo "文件 $Upfile_name 已上载成功！"; 
echo "<br><br>\n"; 
echo "文件位置：$FileName"; 
echo "<br><br>\n"; 
echo "文件大小：$FileSize"; 
echo "<br><br>\n"; 
}  
else 
{echo "文件 $Upfile_name上载失败！"; }  
}  
else 
{echo "文件 $Upfile_name已经存在！"; }  
}  
else 
{echo "你没有选择任何文件上载！"; }  
set_time_limit(30);                            //恢复默认超时设置  
} 
?>  
<FORM ENCTYPE = "multipart/form-data" NAME = "SubmitForm" 
ACTION = "default.php" METHOD = "POST">  
<INPUT TYPE = "hidden" NAME = "MAX_FILE_SIZE" VALUE ="1000000">  
<INPUT TYPE = "hidden" NAME = "UploadAction" VALUE = "1">  
<TR><TD><INPUT NAME = "Upfile" TYPE = "file" SIZE = "30"></TD>  
</TR><TR><TD><INPUT NAME = "submit" VALUE = "提交" TYPE = "submit"> 
<INPUT NAME = "reset" VALUE = "重置" TYPE = "reset"></TD>  
</TR></FORM></CENTER></TABLE> 
</BODY>  
</HTML>