php输入和语法
来源：互联网 发布：ecnu公共数据库 编辑：程序博客网 时间：2024/06/08 00:37
<html> <head> <meta content="cntent-type" content="text/html;charset=gb2312"> <title>第一个PHP程序<?php echo"PHP语言标记使用"."<br>" ?></title> <style type="text/css"> body{ margin:0px; background:#ccc; } </style> </head> <body <?php echo'bgcolor="red"' ?>> <script type="text/javascript"> alert("客户端的时间"+(new Date())); </script> <?php echo"服务器时间".date("Y-m-d H:i:s")."<br>"; ?> <?php $sysos={1}SERVER["SERVER_SOFTWARE"]; $sysversion=PHP_VERSION; mysql_connect("localhost","root","root"); $mysqlinfo=mysql_get_server_info(); if(function_exists("gd_info")){ $gd=gd_info(); $gdinfo=$gd["GD Version"]; }else{ $gdinfo="未知"; } $freetype=$gd{"FreeType Support"}?"支持":"不支持"; $allowurl=ini_get("allow_url_fopen")?"支持":"不支持"; $max_upload=ini_get("file_uploads")?"支持":"不支持"; $max_ex_time=ini_get("max_execution_time")?ini_get("upload_max_filesize"):"Disable"; date_default_timezone_set("Etc/GMT-8"); $systemtime=date("Y-m-d H:i:s",time()); echo"<table align=center cellspacing=0 cellpadding=0>"; echo"<caption><h2>系统信息 </h2></caption>"; echo"<tr><td>Web服务: </td><td>$sysos </td></tr>"; echo"<tr><td>PHP版本: </td><td>$sysversion </td></tr>"; echo"<tr><td>MySQL版本: </td><td>$mysqlinfo </td></tr>"; echo"<tr><td>GD版本: </td><td>$gdinfo </td></tr>"; echo"<tr><td>Free Type: </td><td>$freetype </td></tr>"; echo"<tr><td>远程文件获取: </td><td>$allowurl </td></tr>"; echo"<tr><td>最大上传限制: </td><td>$max_upload </td></tr>"; echo"<tr><td>最大执行时间: </td><td>$max_ex_time </td></tr>"; echo"<tr><td>服务器时间: </td><td>$systemtime </td></tr>"; ?> <?php $expression=4; if($expression){ ?> <p align="<?php echo'center'?>">this is true</p> <?php }else{ ?> <p>this is false</p> <?php } ?> <?php echo"1.这个标记是标准PHP语言标记。"."<br>"?> <script language="php"> echo"2.这个标记是脚本风格，是最长的标记<br>"; </script> <? echo "3.这是最短的标记风格"."<br>" ?> <?=$expression ?>这也是一种简单方式，等价于<br><? echo $expression ?> <% echo"这个标记类似于ASP标签的写法<br>" %> <%=$expression %>这也是一种简单方式，等价于<% echo $expression %> <?php $var=''; if(empty($var)){ echo"<br>".'$var is either 0 or not set at all'; } if(!isset($var)){ echo'$var is not set at all'; } unset($var); if(isset($var)){ print"this var is set set so i will print"; } $hi="hello"; $hi="world"; echo"<br>$hi"; echo"<br>${$hi}"; echo"<br>$hi$hello"; echo"<br>$hi${$hi}"; $foo='bob'; $bar=&$foo; $bar="my name is tom"; echo "<br>".$bar; echo "<br>".$foo; $foo="your name is bob"; echo "<br>".$bar; echo "<br>".$foo; $bool=true; $str="string"; $int=123; var_dump($bool); var_dump($str); var_dump($int); var_dump((bool)"false"); $num=123456333999; $max=50000*$num; $flo=1.2e3; var_dump($flo); var_dump($num); var_dump($max); echo 'this is g \'simple\' string'."<br>"; $arr=array("fo1"=>"bar",12=>true); print_r($arr); echo "<br>".$arr["fo1"]; echo "<br>".$arr[12]."<br>"; class person{ var $name="jack"; function say(){ echo "\tdong method"; } } $p=new person; echo $p->name; $p->say(); ?> </body></html>
