PHP程序设计经典300例不知道怎么转载，原⽂源⾃:来⾃：php100钟泽锋第⼀例<?php$s_html="<b>⽂字加粗</b>";echo $s_html;?>第⼆例<?php$s_javascript=<<<start<script type="text/javascript">alert("");</script>start;echo $s_javascript;?>第三列<?php$a="name";$$a="hello php";echo $name;?>第四例<?php$color="";echo "<ul>";for($i=1;$i<=10;$i++){if($i%2==0){$color="red";}else{$color="yellow";}echo "<li style='background:".$color.";width:200px'>第".$i."⾏</li></ul>";}?>第五例index.php页⾯：<form action="check.php" method="post">⽤户名：<input type="text" name="user" /><br />密码：<input type="password" name="pass"/><br /><input type="submit" value="提交"/><input type="reset" value="重置"/></form>check.php页⾯：<?phpif(isseet($_POST)){if($_POST['name']=='admin' && $_POST['pass']=='admin'){echo"⽤户登录成功";}else{echo"⽤户登录失败";}?>第6列<?phpecho "index.php<br><br>";echo "_FILE_:"._FILE_."<br>";echo "request_uti:".$_SERVER["request_urt"]."<br>";echo "script_name:".$_SERVER["script_name"]."<br>";echo "php_self:".$_SERVER["php_self"]."<br>";echo "script_filename:".$_SERVER["script_filename"]."<br>";?>第7列<?php$str="0123456789abcdefghijklmnopqrstuvwxyz";$n=5; //字符长度$len=strlen($str)-1;for($i=0;$i<$n;$i++){$s = $s.$str[rand(0,$len)];}echo $s."<br/>";?>第8列<?php$a='';echo "直接输出:".$a;echo "<br/>";echo "直接输出:".'$a';echo "<br/>";echo "直接输出:"."$a";?>第9列index.php页⾯：<?phpecho "常见的原⼦操作";echo "<a href='check.php?action=add'>执⾏增加操作</a><br/>"; echo "<a href='check.php?action=del'>执⾏删除操作</a><br>"; echo "<a href='check.php?action=search'>执⾏查找操作</a><br>"; echo "<a href='check.php?action=update'>执⾏更新操作</a><br>"; ?>check.php页⾯：<?php$action=$_GET["action"];switch($action){case "add";echo "<script>alert('现在可以实现增加功能！');</script>"; break;case "del";echo "<script>alert('现在可以实现删除功能！');</script>"; break;case "search";echo "<script>alert('现在可以实现查找功能！');</script>";case "update";echo "<script>alert('现在可以实现更新功能！');</script>"; break;}?>第10列index.php页⾯：<html><head><title></title></head><body><form action="check.php" method="post">message<input type="text" name="name" value="123456"/><input type="submit" value="提交" /></form></body></html>check.php页⾯：<?php$urlar=parse_url($_SERVER['http_referer']);print("<pre>");print_r($urlar);print_r($_SERVER['http_referer']);if($urlar['host']!="172.0.0.1"){echo "页⾯失效";echo "<script>alert('链接失效');location='index.php';</secript>"; exit;}echo "可以正常访问页⾯";?>第11例index.php页⾯：<form name="myform" accept="date.php" method="post">年龄计算器<br />出⽣年份：<input type="text" name="year" value=""/><br />出⽣⽉份：<input type="text" name="month" value=""/><br />出⽣那天的号数：<input type="text" name="day" value=""/><br /> <input type="submit" value="提交"/><input type="reset" value="重置"/></form>date.php页⾯：<?php$year=$_POST['year'];//获取年份$month=$_POST['month'];//获取⽉份$day=$_POST['day'];//获取⽇期$bithday=mktime(0,0,0,$month,$day,$year);//转化为时间戳毫秒数$nowUNIX=time();//获取现在的时间戳毫秒数$age=$nowUNIX-$bithday;$age=floor($age / (365*24*60*60));//时间戳毫秒数转化为年⽉⽇echo "<script language='javascript' type='text/javascript'>";echo "alert('您的年龄为：".$age."');";echo "</script>";?><div id="">⽤户选择图⽚</div><div id="contains"><select name="mymenu" id="change" onchange="check(this)"> <option value="images/1.jpg">图⽚1</option><option value="images/2.jpg">图⽚2</option><option value="images/3.jpg">图⽚3</option></select><img id="shoetime" src="images/1.jpg"/></div><script type="text/javascript">function check(obj){var src=obj.value;$("shoetime").src=src;}function $(obj){return document.getElementById(obj);}</script>第13例<?phpdate_default_timezone_set('PRC');echo "中国北京时间：";echo date("y-m-d h:i:s")."<br>";date_default_timezone_set('America/New_York');echo "美国纽约时间:";echo date("y-m-d h:i:s")?>第14例<!--论坛发帖内容长度验证--></form><script type="text/javascript">function check(){if(document.myform.text.value==""){alert("内容不能为空")；return false;}return true;}</script><?phpif(!empty($_POST['text'])){$str=$_POST['text'];preg_match_all("/./us",$str,$match);$num=count($match[0]);if($num<=10){echo "<script>alert('输⼊的长度⼩于10');</script";}else{echo "<script>alert('发布成功');</script";}第15例<!--在⽹页中引⼊头部⽂件和底部⽂件-->index.php页⾯<?php include("header.php") ?><div style="background: url('images/3.jpg') no-repeat;width: 900px;height: 300px;"> </div> <?php include("footer.php") ?>header.php页⾯<title>⽂件引⽤</title><style>*{margin: 0px;padding: 0px;}div{margin: auto;}</style><div style="background: url('images/1.jpg') no-repeat;width: 900px;height: 250px;"></div> footer.php页⾯<div style="background: url('images/2.jpg') no-repeat;width: 900px;height: 31px;"> </div>第16例：<!--在⽹页主体中动态却换内容 --><title>⽂件引⽤</title><div style="color: red;"><center><a href="index.php?id=index">⾸页</a><a href="index.php?id=second">简介</a></center></div><?phpswitch($_GET['id'])//判断页⾯传⼊的id{case "index";require("main.php");//引⽤主页⽂件break;case "second";require("main2.php");break;default:require("main.php");}?>第17例：检测⽂件后缀<br /><input type="file" name="file" value=""/><br /> <!--⽂件域--><input type="submit" value="检测"/></form><?php$pic=$_POST['file'];$pics=explode('.',$pic);//转换为数组$num=count($pics); //获取数组长度echo '<br />上传⽂件的扩展名为：'.$pics[$num-1]; //获取扩展名内容?>第18例：<?php/* 测试脚本运⾏时间*/header("Content-Type:text/html;charset=utf-8");$stime=microtime(true);echo "本php脚本运⾏的时间为：";$etime=microtime(true);$total=$etime-$stime;$str_total=var_export($total,true);if(substr_count($str_total,"E")){$float_tloal=floatval(substr($str_total,5));$total=$float_tloal/100000;echo "$total".'秒';}?>第19例：<!--模拟实现登录链接数据库--><form action="index.php" method="post">选择链接⽅式：<select name="host"><option value="localhost" selected="" >localhost</option><option value="127.0.0.1">127.0.0.1</option></select><br />⽤户名：<input type="text" value="" name="user"/><br />密码：<input type="password" value="" name="pwd"/><br /><input type="submit" value="链接"/><input type="reset" value="重置"/></form><?phpif(isset($_POST['host'])){$conn=mysql_connect($_POST['host'],$_POST['user'],$_POST['pwd'])or die("数据库链接失败"); if($conn){echo "<script>alert('数据库链接成功')<script>";}}?>第20例：<select name="database" size="10"><option value="0" selected="">请选择</option><?php$conn=mysql_connect("localhost","root","123456");$re=mysql_query("show databases");while($arr=mysql_fetch_assoc($re)){ ?><option value="<?php echo $arr['Database'];?>"><?php echo $arr['Database']."<br/>";?></option><?php}?></select><input type="submit" value="确定"/></form><?php$conn=mysql_connect("localhost","root","123456");$database=$_POST['database'];if(isset($_POST['database'])){if($database=="0"){echo "<script>alert('没有选择数据库')<script>";}else{mysql_select_db($database);echo "<script>alert('选择".$database."数据库链接成功')<script>";}}?>第21例check.php页⾯：<?php//图⽚上传到服务器function fileext($filename){return substr(strrchr($filename,'.'),1); //获取扩展名}function random($length){ //⽣成随机⽂件名函数$hash='CR-';$chars='abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz'; $max=strlen($chars)-1;mt_srand((double)microtime()*1000000);for($i=0;$i<$length;$i++){$hash.=$chars(mt_rand(0,$max));}return $hash;}form.php页⾯：<form action="upload.php" method="post" enctype="multipart/form-data"><!--定义method属性--><table border="0" cellspacing="0" cellpadding="0" align="center" width="300px"><tr><td width="55" height="20" align="center"><input type="hidden" name="MAX_FILE_SIZE" value="2000000"/>⽂件：</td><td height="16"><input type="file" name="file" value="浏览"/></td></tr><tr><td align="center" colspan="2"><br /><input type="submit" name="B1" value="上传"/></td></tr></table></form>upload.php页⾯：<?phpinclude("check.php");$uploaddir="./files?";$type=array("jpg","gif","bmp","jpeg","pan");//设置允许上传⽂件的类型if(!in_array(strtolower(fileext($_FILES['file']['name'])),$type))//判断上传⽂件的类型是否在范围内{$text=implode(",",$type);echo "您只能上传以下类型⽂件：",$text,"<br/>";}else{$filename=explode(".",$_FILES['file']['name']);//获取⽂件名do{$filename[0]=random(10);$name=implode(".",$filename);$uploadfile=$upload.$name;}while(file_exists($uploadfile));if(is_uploaded_file($_FILES['file']['tmp_name'])){if(move_uploaded_file($_FILES['file']['tmp_name'],$uploadfile)){echo "<center>您的⽂件已经上传完毕上传图⽚预览：</center><br/><center><img src='$uploadfile'></center"; echo "<br/><center><a href='javascript:history.go(-1)'>继续上传</a></center>";}else{echo "上传失败";}}}?>第22例<!--在外部⽂件中读取并显⽰⽤户协议--><table width="100" border="0" cellpadding="1" cellspacing="1" bgcolor="#cccccc"><tr><td bgcolor="#ffffff"><!--写⽂本内容要加载区--></tr></table><form action="zhuce.php" method="post" name="register" id="form"><input type="hidden" name="action" id="action" value="agree"/><input type="submit" name="submit" value="同意"/></form><form action="" method="post" name="form" id="from"><a href="index.php"><input type="reset" name="reset1" id="reset1" value="不同意"/></a></form>第23例<!--不区分⼤⼩写输⼊的⽤户登录名--><form action="check.php" method="post"><table width="250px" border="0" align="center" cellpadding="3" cellspacing="1" bgcolor="#cccccc"> <tbody><tr><td colspan="2" height="25" bgcolor="#f7f7f7" align="center">⽤户登录——不区分⼤⼩写</td></tr></tbody><tr><td width="20%" height="25" align="right" bgcolor="#f7f7f7">⽤户名：</td><td height="25" bgcolor="#f7f7f7"><input style="" name="username" type="text" id="username"/></td></tr><tr><td height="25" align="right" bgcolor="#f7f7f7">密码：</td><td height="25" bgcolor="#f7f7f7"><input type="password" name="userpwd" id="password"/></td></tr><tr align="center"><td height="25" colspan="2" align="right" bgcolor="#f7f7f7"></td></tr></table><table width="100%" border="0" cellpadding="0" cellspacing="0"><tr><td width="39%" align="right"><span style="word-spacing: 0px; margin:0px ; margin-bottom: 0px;" ><input type="submit" name="login" id="login" value="登录"/></span></td><td width="61%"><input type="reset" name="reset" id="reset" value="重置"/></td></tr></table></form>第24例倒计时某些赛事header("Content-Type:text/html;charset=utf-8");$i=time();$x=strtotime("2015-04-5 00:00:00");;$d=round(($x-$i)/3600/24);echo "<b>距离清明节还有：<font color='red'>".$d."</form>天</b>"; ?>第25例index.php页⾯：读取外部⽂本并分页function m_substr($str,$start,$length){$str_length=$start=$length;$tmp_str="";for($i-0;$i<$str_length;$i++){if(ord(substr($str,$i,1))==0x0a){$tmp_str.='<br/>';}if(ord(substr($str,$i,1))>0x0a){$tmp_str.=substr($str,$i,2);$i++;}else{$tmp_str.=substr($str,$i,1);}}retun $tmp_str;}?><body><div id="header"><b>⽂本⽂件内容分页显⽰</b></div><div id="content"><div id="show"><p><?php/*此处省略⾃定义函数m_substr()具体实现*/if(isset($_GET['page'])){$page=$_GET['page'];}else{$page=1;}$counter=file_get_contents("example.txt");$length=strlen($counter);$page_count=ceil($length/400);$str=m_substr($counter,0,($page-1)*400);$str1=m_substr($counter,0,$page*400);echo substr($str1,strlen($str),strlen($str1)-strlen($str)); ?></p></div><center><span><?phpecho "当前页：".$page."/".$page_count." ";{echo "<a herf=index.php?page=".($page-1).">上⼀页</a>"; }if($page<$page_count){echo "<a herf=index.php?page=".($page+1).">下⼀页</a>"; }echo "<a herf=index.php?page=".$page_count.">尾页</a>"; ?></span></center></div><div id="footer"><br />⽂本分页</div></body>第26例会员信息分页显⽰conn.php页⾯：<?phpheader("Content-Type:text/html;charset=utf-8");mysql_connect("localhost","root","") or die("数据库连接有误!");mysql_select_db("student") or die("数据库选择有误!");mysql_query("set names 'utf8'");?><?php//user.php页⾯：$page=isset($_GET['page'])?$_GET['page']:1;$pagesize=5; //显⽰条数$sql="select count(*) from student";$result=mysql_query($sql);$maxrows=mysql_result($result,0,0);$maxpage=ceil($maxrows/$pagesize);if($page>$maxpage){$page=$maxpage;}if($page<1){$page=1;}$offset=($page-1)*$pagesize;$sql="select * from student limit{$offset},$pagesize";$result=mysql_query($sql);while($rows=mysql_fetch_assoc($result)){echo "<tr>";echo "<td>{$rows['id']}</td>";echo "<td>{$rows['username']}</td>";echo "<td>{$rows['email']}</td>";echo "<td>".date("Y-m-d H:i:s",$rows['datetime']+8*3600)."</td>";echo "</tr>";}?>第27例：检测⽤户输⼊⽇期的合法性<form action="index.php" method="poost"><b>检测⽤户输⼊⽇期的合法性</b>⽤户名：<input type="text" name="username" value=""/><br />⽣⽇⽇期：<input type="text" name="userdate" value="" size="18"/><br /><input type="submit" value="检测"/><input type="reset" value="重置"/></form><?phpif(!empty($_POST['username'])){$arr=explode("-",$_POST['userdate']);if(checkdate($arr[1],$arr[2],$arr[0])){echo "<script>alert('⽇期".$_POST['userdate']."格式正确')</script>"; }else{echo "<script>alert('⽇期".$_POST['userdate']."格式不对')</script>"; }}?>第28例延迟php脚本的执⾏时间<?phpheader("Content-Type:text/html;charset=utf-8");echo "脚本载⼊时间：".date('Y-m-d H:i:s');sleep(5); //脚本等待5秒后执⾏echo "<br/><br/>";echo "执⾏完毕时间：".date('Y-m-d H:i:s');?>第29例使⽤php动态创建嵌套⽂件夹<?phpheader("Content-Type:text/html;charset=utf-8");function createfolder($path){if(!file_exists($path)){createfolder(dirname($path));mkdir($path,0777);}}createfolder("aa/bb/cc");//模拟测试?>第30例⽤户成绩查询<?phpheader("Content-Type:text/html;charset=utf-8");?><form action="index.php" method="post" ><b>输⼊分数</b><br />分数：<input type="text" name="result" value=""/><br /><input type="submit" value="查询"/><input type="reset"/></form><?phpif(!empty($_POST['result'])){$result=$_POST['result'];if($result>=80&&$result<=100){echo "<script>alert('您的成绩为优秀')</script>";}else if($result>=60&&$result<80){echo "<script>alert('您的成绩为合格')</script>";}else{echo "<script>alert('您的成绩为不合格')</script>";}}?>第31例⽤户输⼊⽇期查询备忘录<?phpheader("Content-Type:text/html;charset=utf-8");?><form action="index.php" method="post"><b>输⼊⽇期：</b><br /><input type="text" name="date"/><br /><input type="submit" value="查询"/><input type="reset"/></form><?phpif(!empty($_POST['date'])){$date=$_POST['date'];$rc=array(); //数组$rc['5-1']='查看⽹站 ';$rc['5-2']='同学聚会';$rc['5-3']='购物';$rc['5-4']='出差';$rc['5-5']='发邮件';foreach($rc as $key=>$value){if($key==$date){echo "<script>alert('".$key."⽇备忘录：".$value."')</script>"; }else{echo "<script>alert('⽆备忘录')</script>";break;}}}?>第32例隔⾏换⾊<?phpheader("Content-Type:text/html;charset=utf-8");echo "<center><b>隔⾏换⾊</b></center>";$color="";echo '<table border="1" width="200" height="200" align="center" cellspacing="0">'; for($i=0;$i<5;$i++){if($i%2==0){$color="red";}else{$color="blue";}echo "<tr bgcolor='".$color."'>";//输出⾏并把颜⾊赋值给背景for($j=0;$j<5;$j++){echo "<td>".$j."</td>";}echo "</tr>";}echo "</table>";?>第33例输出倒序乘法表<?phpheader("Content-type:text/html;charset=utf-8");for($i=9;$i>=1;$i--){for($j=$i;$j>=1;$j--){echo "$i*$j=".($i*$j)." ";}echo "<br/>";}?>第34例表格计算器<?phpheader("Content-Type:text/html;charset=utf-8");?><form action="index.php" method="post">结果：<input type="text" name="sum" id="sum" size="15"/><br />数字1：<input type="text" name="num1" size="10"/><br />运算符：<select name="sub"><option value="+">+</option><option value="-">-</option><option value="*">*</option><option value="/">/</option></select><br />数字2<input type="text" name="num2" id="num2" size="10"/><br /><input type="submit" value="计算"/><input type="reset"/></form><?phpif(!empty($_POST['num1'])){$num1=$_POST['num1'];$num2=$_POST['num2'];$sub=$_POST['sub'];$sum=0;switch($sub){case "+":$sum=$num1+$num2;break;case "-":$sum=$num1-$num2;break;case "*":$sum=$num1*$num2;break;case "/":$sum=$num1/$num2;break;}echo "<script>alert('计算出结果为：".$sum."');</script>";echo "<script>document.getElementById('sum').value='".$sum."'</script>";}?>第35例php动态表格⽣成器<style type="text/css">body{background:#ccc;}</style><form action="35.php" method="post"><b>输⼊⾏列⽣成表格</b><br><br>输⼊⾏：<input type="text" name="cols"><br><br>输⼊列：<input type="text" name="rows"><br><br><input type="submit" value="⽣成表格"><input type="reset" value="重置⾏列"></form><?phpheader("Content-Type:text/html;charset=utf-8");if(!empty($_POST['cols'])){echo"<center><b>⽤户动态输出表格.⾏".$_POST['cols'].",列".$_POST['rows']."</b></center>"; $color="";echo "<table border='1' width='200px' height='200px' align='center' cellspacing='0'>";for($i = 0 ; $i < $_POST['cols'] ; $i++){if($i%2==0){$color="red";}else{$color="blue";}echo "<tr bgcolor='".$color."'>";for($j = 0 ;$j < $_POST['rows'] ; $j++){echo "<td>".$j."</td>";}echo "</tr>";}echo "</table>";}?>第36例：使⽤分⽀语句加载不同⽹页主体<div id="header"><!--页⾯导航条--><ul><li><a href="?id=shop1">基本商品</a></li><li><a href="?id=shop2">推荐商品</a></li><li><a href="?id=shop3">分类商品</a></li></ul></div><div id="content"><!--此处动态更改主体内容--></div><?php$shop_id=$_GET['id'];switch($shop_id){case "shop1"://如果ID为shop1require("shop1.php");break;case "shop2":require("shop2.php");break;case "shop3":require("shop3.php");break;default://默认的选择require("shop1.php");}?>第37例：php万年历<?phpheader("Content-type:text/html;charset=utf-8");date_default_timezone_set("Asia/Shanghai");//设置⽇期时区为中国时区$today = time();$year =@$_GET["year"];$month = @$_GET["month"];if($year=='') $year = date("Y",$today);if($month=='') $month = date("m",$today);if((int)$month==0){$year-=1;$month=12;}$time = mktime(0,0,0,$month,1,$year);//格式化当前⽇期$year = date('Y',$time);$month = date('m',$time);$days = date('t',$time);//当前⽉份⼀共有⼏天$fstdw = date('N',$time);//当前⽉份第⼀天为星期⼏echo "<table border=1 width=260 cellspacing=0 cellpadding=0 align=center bgcolor=#cccccc>"; echo "<tr><td colspan=7 class="title">";$str = "<a href=?year=".($year-1)."&month=".$month.">";$str .= "«</a> ".$year."年 ";$str .= "<a href=?year=".($year+1)."&month=".$month.">";$str .= "»</a> ";$str .= "<a href=?year=".$year."&month=".($month-1).">";$str .= "«</a> ".$month."⽉ ";$str .= "<a href=?year=".$year."&month=".($month+1).">";$str .= "» </a>";echo $str;echo "</td></tr>";echo"<tr>";$str = "<td>⼀</td>";$str .= "<td>⼆</td>";$str .= "<td>三</td>";$str .= "<td>四</td>";$str .= "<td>五</td>";$str .= "<td>六</td>";$str .= "<td>七</td>";echo $str;echo "</td>";$rows = ceil(($days + $fstdw-1)/7);$cd = 1;for($i=0;$i<$rows;$i++){echo "<tr>";。
